commit:     5027081b510a47cbccec3cabd2dc6504b0484821
Author:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
AuthorDate: Mon Jun  6 08:41:37 2022 +0000
Commit:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
CommitDate: Mon Jun  6 08:41:37 2022 +0000
URL:        https://gitweb.gentoo.org/repo/proj/prefix.git/commit/?id=5027081b

toolchain.eclass: sync with gx86

Signed-off-by: Fabian Groffen <grobian <AT> gentoo.org>

 eclass/toolchain.eclass | 1327 +++++++++++++++++++++++++++--------------------
 1 file changed, 751 insertions(+), 576 deletions(-)

diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass
index a07f9b680e..ed8c227c4a 100644
--- a/eclass/toolchain.eclass
+++ b/eclass/toolchain.eclass
@@ -1,23 +1,33 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-# Maintainer: Toolchain Ninjas <[email protected]>
-# @SUPPORTED_EAPIS: 5 6 7
+# @ECLASS: toolchain.eclass
+# @MAINTAINER:
+# Toolchain Ninjas <[email protected]>
+# @SUPPORTED_EAPIS: 7 8
+# @BLURB: Common code for sys-devel/gcc ebuilds
+
+case ${EAPI} in
+       7) inherit eutils ;;
+       8) ;;
+       *) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+if [[ ! ${_TOOLCHAIN_ECLASS} ]]; then
+_TOOLCHAIN_ECLASS=1
 
 DESCRIPTION="The GNU Compiler Collection"
 HOMEPAGE="https://gcc.gnu.org/";
 
-# TODO: Please audit this inherit list on future EAPI bumps and ideally
-# conditonalise them where possible.
-inherit eutils flag-o-matic gnuconfig libtool multilib pax-utils 
toolchain-funcs prefix
+inherit edo flag-o-matic gnuconfig libtool multilib pax-utils toolchain-funcs 
prefix
 
 tc_is_live() {
        [[ ${PV} == *9999* ]]
 }
 
 if tc_is_live ; then
-       EGIT_REPO_URI="https://gcc.gnu.org/git/gcc.git";
-       # naming style:
+       EGIT_REPO_URI="https://gcc.gnu.org/git/gcc.git 
https://github.com/gcc-mirror/gcc";
+       # Naming style:
        # gcc-10.1.0_pre9999 -> gcc-10-branch
        #  Note that the micro version is required or lots of stuff will break.
        #  To checkout master set gcc_LIVE_BRANCH="master" in the ebuild before
@@ -25,20 +35,12 @@ if tc_is_live ; then
        EGIT_BRANCH="releases/${PN}-${PV%.?.?_pre9999}"
        EGIT_BRANCH=${EGIT_BRANCH//./_}
        inherit git-r3
+elif [[ -n ${TOOLCHAIN_USE_GIT_PATCHES} ]] ; then
+       inherit git-r3
 fi
 
 FEATURES=${FEATURES/multilib-strict/}
 
-case ${EAPI:-0} in
-       0|1|2|3|4*) die "Need to upgrade to at least EAPI=5" ;;
-       5*|6) inherit eapi7-ver ;;
-       7) ;;
-       *) die "I don't speak EAPI ${EAPI}." ;;
-esac
-
-EXPORT_FUNCTIONS pkg_pretend pkg_setup src_unpack src_prepare src_configure \
-       src_compile src_test src_install pkg_postinst pkg_postrm
-
 #---->> globals <<----
 
 export CTARGET=${CTARGET:-${CHOST}}
@@ -58,50 +60,116 @@ is_crosscompile() {
 # The target prefix defaults to the host prefix, except for cross compilers, 
which targets the empty prefix by default.
 : ${TPREFIX:=$(is_crosscompile || echo "${EPREFIX}")}
 
-# General purpose version check.  Without a second arg matches up to minor 
version (x.x.x)
+# @FUNCTION: tc_version_is_at_least
+# @USAGE: ver1 [ver2]
+# @DESCRIPTION:
+# General purpose version check. Without a second argument, matches
+# up to minor version (x.x.x).
 tc_version_is_at_least() {
        ver_test "${2:-${GCC_RELEASE_VER}}" -ge "$1"
 }
 
-# General purpose version range check
+# @FUNCTION: tc_version_is_between
+# @USAGE: ver1 ver2
+# @DESCRIPTION:
+# General purpose version range check.
 # Note that it matches up to but NOT including the second version
 tc_version_is_between() {
        tc_version_is_at_least "${1}" && ! tc_version_is_at_least "${2}"
 }
 
+# @ECLASS_VARIABLE: TOOLCHAIN_GCC_PV
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Used to override GCC version. Useful for e.g. live ebuilds or snapshots.
+# Defaults to ${PV}.
+
+# @ECLASS_VARIABLE: TOOLCHAIN_USE_GIT_PATCHES
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Used to force fetching patches from git. Useful for non-released versions
+# of GCC where we don't want to keep creating patchset tarballs for a new
+# release series (e.g. suppose 12.0 just got released, then adding snapshots
+# for 13.0, we don't want to create new patchsets for every single 13.0 
snapshot,
+# so just grab patches from git each time if this variable is set).
+
+# @ECLASS_VARIABLE: TOOLCHAIN_PATCH_DEV
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Indicate the developer who hosts the patchset for an ebuild.
+
+# @ECLASS_VARIABLE: GCC_PV
+# @INTERNAL
+# @DESCRIPTION:
+# Internal variable representing (spoofed) GCC version.
 GCC_PV=${TOOLCHAIN_GCC_PV:-${PV}}
+
+# @ECLASS_VARIABLE: GCC_PVR
+# @INTERNAL
+# @DESCRIPTION:
+# Full GCC version including revision.
 GCC_PVR=${GCC_PV}
 [[ ${PR} != "r0" ]] && GCC_PVR=${GCC_PVR}-${PR}
 
+# @ECLASS_VARIABLE: GCC_RELEASE_VER
+# @INTERNAL
+# @DESCRIPTION:
 # GCC_RELEASE_VER must always match 'gcc/BASE-VER' value.
 # It's an internal representation of gcc version used for:
 # - versioned paths on disk
 # - 'gcc -dumpversion' output. Must always match <digit>.<digit>.<digit>.
 GCC_RELEASE_VER=$(ver_cut 1-3 ${GCC_PV})
 
+# @ECLASS_VARIABLE: GCC_BRANCH_VER
+# @INTERNAL
+# @DESCRIPTION:
+# GCC branch version.
 GCC_BRANCH_VER=$(ver_cut 1-2 ${GCC_PV})
+# @ECLASS_VARIABLE: GCCMAJOR
+# @INTERNAL
+# @DESCRIPTION:
+# Major GCC version.
 GCCMAJOR=$(ver_cut 1 ${GCC_PV})
+# @ECLASS_VARIABLE: GCCMINOR
+# @INTERNAL
+# @DESCRIPTION:
+# Minor GCC version.
 GCCMINOR=$(ver_cut 2 ${GCC_PV})
+# @ECLASS_VARIABLE: GCCMICRO
+# @INTERNAL
+# @DESCRIPTION:
+# GCC micro version.
 GCCMICRO=$(ver_cut 3 ${GCC_PV})
 
+# @ECLASS_VARIABLE: GCC_CONFIG_VER
+# @INTERNAL
+# @DESCRIPTION:
 # Ideally this variable should allow for custom gentoo versioning
 # of binary and gcc-config names not directly tied to upstream
-# versioning. In practive it's hard to untangle from gcc/BASE-VER
+# versioning. In practice it's hard to untangle from gcc/BASE-VER
 # (GCC_RELEASE_VER) value.
 GCC_CONFIG_VER=${GCC_RELEASE_VER}
 
 # Pre-release support. Versioning schema:
 # 1.0.0_pre9999: live ebuild
-# 1.2.3_alphaYYYYMMDD: weekly snapshots
+# 1.2.3_pYYYYMMDD (or 1.2.3_preYYYYMMDD for unreleased major versions): weekly 
snapshots
 # 1.2.3_rcYYYYMMDD: release candidates
-if [[ ${GCC_PV} == *_alpha* ]] ; then
-       # weekly snapshots
-       SNAPSHOT=${GCCMAJOR}-${GCC_PV##*_alpha}
+if [[ ${GCC_PV} == *_pre* ]] ; then
+       # Weekly snapshots
+       SNAPSHOT=${GCCMAJOR}-${GCC_PV##*_pre}
+elif [[ ${GCC_PV} == *_p* ]] ; then
+       # Weekly snapshots
+       SNAPSHOT=${GCCMAJOR}-${GCC_PV##*_p}
 elif [[ ${GCC_PV} == *_rc* ]] ; then
-       # release candidates
+       # Release candidates
        SNAPSHOT=${GCC_PV%_rc*}-RC-${GCC_PV##*_rc}
 fi
 
+# Require minimum gcc version to simplify assumptions.
+# Normally we would require gcc-6+ (based on sys-devel/gcc)
+# but we still have sys-devel/gcc-apple-4.2.1_p5666.
+tc_version_is_at_least 4.2.1 || die "${ECLASS}: ${GCC_RELEASE_VER} is too old."
+
 PREFIX=${TOOLCHAIN_PREFIX:-${EPREFIX}/usr}
 
 LIBPATH=${TOOLCHAIN_LIBPATH:-${PREFIX}/lib/gcc/${CTARGET}/${GCC_CONFIG_VER}}
@@ -116,7 +184,7 @@ fi
 
 
DATAPATH=${TOOLCHAIN_DATAPATH:-${PREFIX}/share/gcc-data/${CTARGET}/${GCC_CONFIG_VER}}
 
-# Dont install in /usr/include/g++-v3/, but in gcc internal directory.
+# Don't install in /usr/include/g++-v3/, but instead to gcc's internal 
directory.
 # We will handle /usr/include/g++-v3/ with gcc-config ...
 
STDCXX_INCDIR=${TOOLCHAIN_STDCXX_INCDIR:-${LIBPATH}/include/g++-v${GCC_BRANCH_VER/\.*/}}
 
@@ -126,46 +194,33 @@ LICENSE="GPL-3+ LGPL-3+ || ( GPL-3+ libgcc libstdc++ 
gcc-runtime-library-excepti
 IUSE="test vanilla +nls"
 RESTRICT="!test? ( test )"
 
-tc_supports_dostrip() {
-       case ${EAPI:-0} in
-               5*|6) return 1 ;;
-               7) return 0 ;;
-               *) die "Update apply_patches() for ${EAPI}." ;;
-       esac
-}
-
-tc_supports_dostrip || RESTRICT+=" strip" # cross-compilers need controlled 
stripping
-
 TC_FEATURES=()
 
 tc_has_feature() {
        has "$1" "${TC_FEATURES[@]}"
 }
 
-if [[ ${PN} != "kgcc64" && ${PN} != gcc-* ]] ; then
-       # --enable-altivec was dropped before gcc-4. We don't set it.
-       # We drop USE=altivec for newer gccs only to avoid rebuilds
-       # for most stable users. Once gcc-10 is stable we can drop it.
-       if ! tc_version_is_at_least 10; then
-               IUSE+=" altivec"
-       fi
-       IUSE+=" debug +cxx +nptl" TC_FEATURES+=(nptl)
+# Prefix: allow gcc-apple post 4.2.1
+if [[ ${PN} != "kgcc64" && ${PN} != gcc-* ]] ||
+       [[ ${PN} == "gcc-apple" && tc_version_is_at_least 12.1 ]] ; then
+       IUSE+=" debug +cxx +nptl" TC_FEATURES+=( nptl )
        [[ -n ${PIE_VER} ]] && IUSE+=" nopie"
        [[ -n ${SPECS_VER} ]] && IUSE+=" nossp"
-       # fortran support appeared in 4.1, but 4.1 needs outdated mpfr
-       tc_version_is_at_least 4.2 && IUSE+=" +fortran" TC_FEATURES+=(fortran)
-       tc_version_is_at_least 3 && IUSE+=" doc hardened multilib objc"
-       tc_version_is_between 3 7 && IUSE+=" awt gcj" TC_FEATURES+=(gcj)
-       tc_version_is_at_least 3.3 && IUSE+=" pgo"
-       tc_version_is_at_least 4.0 &&
-               IUSE+=" objc-gc" TC_FEATURES+=(objc-gc)
-       tc_version_is_at_least 4.1 && IUSE+=" libssp objc++"
-       tc_version_is_at_least 4.2 && IUSE+=" +openmp"
+       IUSE+=" +fortran" TC_FEATURES+=( fortran )
+       IUSE+=" doc hardened multilib objc"
+       tc_version_is_between 3 7 && IUSE+=" awt gcj" TC_FEATURES+=( gcj )
+       IUSE+=" pgo"
+       IUSE+=" objc-gc" TC_FEATURES+=( objc-gc )
+       IUSE+=" libssp objc++"
+       IUSE+=" +openmp"
+
        tc_version_is_at_least 4.3 && IUSE+=" fixed-point"
        tc_version_is_at_least 4.7 && IUSE+=" go"
+
        # sanitizer support appeared in gcc-4.8, but <gcc-5 does not
        # support modern glibc.
-       tc_version_is_at_least 5 && IUSE+=" +sanitize"
+       tc_version_is_at_least 5 && IUSE+=" +sanitize"  TC_FEATURES+=( sanitize 
)
+
        # Note:
        #   <gcc-4.8 supported graphite, it required forked ppl
        #     versions which we dropped.  Since graphite was also experimental 
in
@@ -173,28 +228,24 @@ if [[ ${PN} != "kgcc64" && ${PN} != gcc-* ]] ; then
        #   <gcc-5 supported graphite, it required cloog
        #   <gcc-6.5 supported graphite, it required old incompatible isl
        tc_version_is_at_least 6.5 &&
-               IUSE+=" graphite" TC_FEATURES+=(graphite)
+               IUSE+=" graphite" TC_FEATURES+=( graphite )
+
        tc_version_is_between 4.9 8 && IUSE+=" cilk"
        tc_version_is_at_least 4.9 && IUSE+=" ada"
-
-       # Don't enable USE=vtv starting from gcc-10. Once gcc-10
-       # stable everywhere disable by default on older versions
-       # as well.
-       if tc_version_is_at_least 10; then
-               IUSE+=" vtv"
-       elif tc_version_is_at_least 4.9; then
-               IUSE+=" +vtv"
-       fi
+       tc_version_is_at_least 4.9 && IUSE+=" vtv"
        tc_version_is_at_least 5.0 && IUSE+=" jit"
        tc_version_is_between 5.0 9 && IUSE+=" mpx"
        tc_version_is_at_least 6.0 && IUSE+=" +pie +ssp +pch"
+
        # systemtap is a gentoo-specific switch: bug #654748
        tc_version_is_at_least 8.0 &&
-               IUSE+=" systemtap" TC_FEATURES+=(systemtap)
+               IUSE+=" systemtap" TC_FEATURES+=( systemtap )
+
        tc_version_is_at_least 9.0 && IUSE+=" d"
        tc_version_is_at_least 9.1 && IUSE+=" lto"
-       tc_version_is_at_least 10 && IUSE+=" zstd" TC_FEATURES+=(zstd)
-       tc_version_is_at_least 11 && IUSE+=" valgrind" TC_FEATURES+=(valgrind)
+       tc_version_is_at_least 10 && IUSE+=" cet"
+       tc_version_is_at_least 10 && IUSE+=" zstd" TC_FEATURES+=( zstd )
+       tc_version_is_at_least 11 && IUSE+=" valgrind" TC_FEATURES+=( valgrind )
        tc_version_is_at_least 11 && IUSE+=" custom-cflags"
 fi
 
@@ -209,17 +260,15 @@ fi
 #---->> DEPEND <<----
 
 RDEPEND="sys-libs/zlib
-       nls? ( virtual/libintl )"
-
-tc_version_is_at_least 3 && RDEPEND+=" virtual/libiconv"
-
-if tc_version_is_at_least 4 ; then
-       GMP_MPFR_DEPS=">=dev-libs/gmp-4.3.2:0= >=dev-libs/mpfr-2.4.2:0="
-       if tc_version_is_at_least 4.3 ; then
-               RDEPEND+=" ${GMP_MPFR_DEPS}"
-       elif tc_has_feature fortran ; then
-               RDEPEND+=" fortran? ( ${GMP_MPFR_DEPS} )"
-       fi
+       virtual/libiconv
+       nls? ( virtual/libintl )
+"
+
+GMP_MPFR_DEPS=">=dev-libs/gmp-4.3.2:0= >=dev-libs/mpfr-2.4.2:0="
+if tc_version_is_at_least 4.3 ; then
+       RDEPEND+=" ${GMP_MPFR_DEPS}"
+elif tc_has_feature fortran ; then
+       RDEPEND+=" fortran? ( ${GMP_MPFR_DEPS} )"
 fi
 
 tc_version_is_at_least 4.5 && RDEPEND+=" >=dev-libs/mpc-0.8.1:0="
@@ -245,24 +294,28 @@ BDEPEND="
 DEPEND="${RDEPEND}"
 
 if tc_has_feature gcj ; then
-       GCJ_DEPS=">=media-libs/libart_lgpl-2.1"
-       GCJ_GTK_DEPS="
-               x11-base/xorg-proto
-               x11-libs/libXt
-               x11-libs/libX11
-               x11-libs/libXtst
-               =x11-libs/gtk+-2*
-               virtual/pkgconfig
+       DEPEND+="
+               gcj? (
+                       app-arch/zip
+                       app-arch/unzip
+                       >=media-libs/libart_lgpl-2.1
+                       awt? (
+                               x11-base/xorg-proto
+                               x11-libs/libXt
+                               x11-libs/libX11
+                               x11-libs/libXtst
+                               =x11-libs/gtk+-2*
+                               x11-libs/pango
+                               virtual/pkgconfig
+                       )
+               )
        "
-       tc_version_is_at_least 3.4 && GCJ_GTK_DEPS+=" x11-libs/pango"
-       tc_version_is_at_least 4.2 && GCJ_DEPS+=" app-arch/zip app-arch/unzip"
-       DEPEND+=" gcj? ( awt? ( ${GCJ_GTK_DEPS} ) ${GCJ_DEPS} )"
 fi
 
 if tc_has_feature sanitize ; then
        # libsanitizer relies on 'crypt.h' to be present
-       # on target. glibc used to provide it unconditionally.
-       # Nowadays it's a standalone library: #802648
+       # on target. glibc user to provide it unconditionally.
+       # Nowadays it's a standalone library: bug #802648
        DEPEND+=" sanitize? ( virtual/libcrypt )"
 fi
 
@@ -272,40 +325,86 @@ if tc_has_feature systemtap ; then
 fi
 
 if tc_has_feature zstd ; then
-       DEPEND+=" zstd? ( app-arch/zstd )"
+       DEPEND+=" zstd? ( app-arch/zstd:= )"
+       RDEPEND+=" zstd? ( app-arch/zstd:= )"
 fi
 
 if tc_has_feature valgrind; then
        BDEPEND+=" valgrind? ( dev-util/valgrind )"
 fi
 
-case ${EAPI:-0} in
-       5*|6) DEPEND+=" ${BDEPEND}" ;;
-esac
-
 # Prefix: our version is 1.9, so can't go with gx86's 2.3
-PDEPEND=">=sys-devel/gcc-config-1.7"
+PDEPEND=">=sys-devel/gcc-config-1.9"
 
 #---->> S + SRC_URI essentials <<----
 
+# @ECLASS_VARIABLE: TOOLCHAIN_PATCH_SUFFIX
+# @DESCRIPTION:
+# Used to override compression used for for patchsets.
+# Default is xz for EAPI 8+ and bz2 for older EAPIs.
+if [[ ${EAPI} == 8 ]] ; then
+       : ${TOOLCHAIN_PATCH_SUFFIX:=xz}
+else
+       # Older EAPIs
+       : ${TOOLCHAIN_PATCH_SUFFIX:=bz2}
+fi
+
+# @ECLASS_VARIABLE: TOOLCHAIN_SET_S
+# @DESCRIPTION:
+# Used to override value of S for snapshots and such. Mainly useful
+# if needing to set GCC_TARBALL_SRC_URI.
+: ${TOOLCHAIN_SET_S:=yes}
+
 # Set the source directory depending on whether we're using
 # a live git tree, snapshot, or release tarball.
-S=$(
-       if tc_is_live ; then
-               echo ${EGIT_CHECKOUT_DIR}
-       elif [[ -n ${SNAPSHOT} ]] ; then
-               echo ${WORKDIR}/gcc-${SNAPSHOT}
-       else
-               echo ${WORKDIR}/gcc-${GCC_RELEASE_VER}
-       fi
-)
+if [[ ${TOOLCHAIN_SET_S} == yes ]] ; then
+       S=$(
+               if tc_is_live ; then
+                       echo ${EGIT_CHECKOUT_DIR}
+               elif [[ -n ${SNAPSHOT} ]] ; then
+                       echo ${WORKDIR}/gcc-${SNAPSHOT}
+               else
+                       echo ${WORKDIR}/gcc-${GCC_RELEASE_VER}
+               fi
+       )
+fi
 
 gentoo_urls() {
-       local devspace="HTTP~vapier/dist/URI HTTP~rhill/dist/URI
-       HTTP~zorry/patches/gcc/URI HTTP~blueness/dist/URI
-       HTTP~tamiko/distfiles/URI HTTP~sam/distfiles/URI 
HTTP~slyfox/distfiles/URI"
+       # slyfox's distfiles are mirrored to sam's devspace
+       declare -A devspace_urls=(
+               [soap]=HTTP~soap/distfiles/URI
+               [sam]=HTTP~sam/distfiles/sys-devel/gcc/URI
+               [slyfox]=HTTP~sam/distfiles/URI
+               [tamiko]=HTTP~tamiko/distfiles/URI
+               [zorry]=HTTP~zorry/patches/gcc/URI
+               [vapier]=HTTP~vapier/dist/URI
+               [blueness]=HTTP~blueness/dist/URI
+       )
+
+       # Newer ebuilds should set TOOLCHAIN_PATCH_DEV and we'll just
+       # return the full URL from the array.
+       if [[ -n ${TOOLCHAIN_PATCH_DEV} ]] ; then
+               local devspace_url=${devspace_urls[${TOOLCHAIN_PATCH_DEV}]}
+               if [[ -n ${devspace_url} ]] ; then
+                       local 
devspace_url_exp=${devspace_url//HTTP/https:\/\/dev.gentoo.org\/}
+                       devspace_url_exp=${devspace_url_exp//URI/$1}
+                       echo ${devspace_url_exp}
+                       return
+               fi
+       fi
+
+       # But we keep the old fallback list for compatibility with
+       # older ebuilds (overlays etc).
+       local devspace="
+               HTTP~soap/distfiles/URI
+               HTTP~sam/distfiles/URI
+               HTTP~sam/distfiles/sys-devel/gcc/URI
+               HTTP~tamiko/distfiles/URI
+               HTTP~zorry/patches/gcc/URI
+               HTTP~vapier/dist/URI
+               HTTP~blueness/dist/URI"
        devspace=${devspace//HTTP/https:\/\/dev.gentoo.org\/}
-       echo mirror://gentoo/$1 ${devspace//URI/$1}
+       echo ${devspace//URI/$1} mirror://gentoo/$1
 }
 
 # This function handles the basics of setting the SRC_URI for a gcc ebuild.
@@ -330,19 +429,19 @@ gentoo_urls() {
 #      PATCH_GCC_VER
 #                      This should be set to the version of the gentoo patch 
tarball.
 #                      The resulting filename of this tarball will be:
-#                      
gcc-${PATCH_GCC_VER:-${GCC_RELEASE_VER}}-patches-${PATCH_VER}.tar.bz2
+#                      
gcc-${PATCH_GCC_VER:-${GCC_RELEASE_VER}}-patches-${PATCH_VER}.tar.xz
 #
 #      PIE_VER
 #      PIE_GCC_VER
 #                      These variables control patching in various updates for 
the logic
-#                      controlling Position Independant Executables. PIE_VER 
is expected
+#                      controlling Position Independent Executables. PIE_VER 
is expected
 #                      to be the version of this patch, and PIE_GCC_VER the 
gcc version of
 #                      the patch:
 #                      An example:
 #                                      PIE_VER="8.7.6.5"
 #                                      PIE_GCC_VER="3.4.0"
 #                      The resulting filename of this tarball will be:
-#                      
gcc-${PIE_GCC_VER:-${GCC_RELEASE_VER}}-piepatches-v${PIE_VER}.tar.bz2
+#                      
gcc-${PIE_GCC_VER:-${GCC_RELEASE_VER}}-piepatches-v${PIE_VER}.tar.xz
 #
 #      SPECS_VER
 #      SPECS_GCC_VER
@@ -354,7 +453,7 @@ gentoo_urls() {
 #                                      SPECS_VER="8.7.6.5"
 #                                      SPECS_GCC_VER="3.4.0"
 #                      The resulting filename of this tarball will be:
-#                      
gcc-${SPECS_GCC_VER:-${GCC_RELEASE_VER}}-specs-${SPECS_VER}.tar.bz2
+#                      
gcc-${SPECS_GCC_VER:-${GCC_RELEASE_VER}}-specs-${SPECS_VER}.tar.xz
 #
 #      CYGWINPORTS_GITREV
 #                      If set, this variable signals that we should apply 
additional patches
@@ -365,7 +464,7 @@ gentoo_urls() {
 #                      with a Cygwin target.
 get_gcc_src_uri() {
        export PATCH_GCC_VER=${PATCH_GCC_VER:-${GCC_RELEASE_VER}}
-       export UCLIBC_GCC_VER=${UCLIBC_GCC_VER:-${PATCH_GCC_VER}}
+       export MUSL_GCC_VER=${MUSL_GCC_VER:-${PATCH_GCC_VER}}
        export PIE_GCC_VER=${PIE_GCC_VER:-${GCC_RELEASE_VER}}
        export HTB_GCC_VER=${HTB_GCC_VER:-${GCC_RELEASE_VER}}
        export SPECS_GCC_VER=${SPECS_GCC_VER:-${GCC_RELEASE_VER}}
@@ -375,10 +474,10 @@ get_gcc_src_uri() {
        if tc_is_live ; then
                : # Nothing to do w/git snapshots.
        elif [[ -n ${GCC_TARBALL_SRC_URI} ]] ; then
-               # pull gcc tarball from another location. Frequently used by 
gnat-gpl.
+               # Pull gcc tarball from another location. Frequently used by 
gnat-gpl.
                GCC_SRC_URI="${GCC_TARBALL_SRC_URI}"
        elif [[ -n ${SNAPSHOT} ]] ; then
-               
GCC_SRC_URI="ftp://gcc.gnu.org/pub/gcc/snapshots/${SNAPSHOT}/gcc-${SNAPSHOT}.tar.xz";
+               
GCC_SRC_URI="https://gcc.gnu.org/pub/gcc/snapshots/${SNAPSHOT}/gcc-${SNAPSHOT}.tar.xz";
        else
                if tc_version_is_between 5.5 6 || tc_version_is_between 6.4 7 
|| tc_version_is_at_least 7.2 ; then
                        
GCC_SRC_URI="mirror://gnu/gcc/gcc-${GCC_PV}/gcc-${GCC_RELEASE_VER}.tar.xz"
@@ -387,18 +486,18 @@ get_gcc_src_uri() {
                fi
        fi
 
-       [[ -n ${UCLIBC_VER} ]] && \
-               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${UCLIBC_GCC_VER}-uclibc-patches-${UCLIBC_VER}.tar.bz2)"
        [[ -n ${PATCH_VER} ]] && \
-               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${PATCH_GCC_VER}-patches-${PATCH_VER}.tar.bz2)"
+               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${PATCH_GCC_VER}-patches-${PATCH_VER}.tar.${TOOLCHAIN_PATCH_SUFFIX})"
+       [[ -n ${MUSL_VER} ]] && \
+               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${MUSL_GCC_VER}-musl-patches-${MUSL_VER}.tar.${TOOLCHAIN_PATCH_SUFFIX})"
 
        [[ -n ${PIE_VER} ]] && \
-               
PIE_CORE=${PIE_CORE:-gcc-${PIE_GCC_VER}-piepatches-v${PIE_VER}.tar.bz2} && \
+               
PIE_CORE=${PIE_CORE:-gcc-${PIE_GCC_VER}-piepatches-v${PIE_VER}.tar.${TOOLCHAIN_PATCH_SUFFIX}}
 && \
                GCC_SRC_URI+=" $(gentoo_urls ${PIE_CORE})"
 
        # gcc minispec for the hardened gcc 4 compiler
        [[ -n ${SPECS_VER} ]] && \
-               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${SPECS_GCC_VER}-specs-${SPECS_VER}.tar.bz2)"
+               GCC_SRC_URI+=" $(gentoo_urls 
gcc-${SPECS_GCC_VER}-specs-${SPECS_VER}.tar.${TOOLCHAIN_PATCH_SUFFIX})"
 
        if tc_has_feature gcj ; then
                if tc_version_is_at_least 4.5 ; then
@@ -436,9 +535,40 @@ toolchain_pkg_pretend() {
 #---->> pkg_setup <<----
 
 toolchain_pkg_setup() {
-       # we dont want to use the installed compiler's specs to build gcc
+       # We don't want to use the installed compiler's specs to build gcc
        unset GCC_SPECS
-       unset LANGUAGES #265283
+
+       # bug #265283
+       unset LANGUAGES
+
+       # See 
https://www.gnu.org/software/make/manual/html_node/Parallel-Output.html
+       # Avoid really confusing logs from subconfigure spam, makes logs far
+       # more legible.
+       MAKEOPTS="--output-sync=line ${MAKEOPTS}"
+}
+
+#---->> src_unpack <<----
+
+# @FUNCTION: toolchain_fetch_git_patches
+# @INTERNAL
+# @DESCRIPTION:
+# Fetch patches from Gentoo's gcc-patches repository.
+toolchain_fetch_git_patches() {
+       local 
gcc_patches_repo="https://anongit.gentoo.org/git/proj/gcc-patches.git 
https://github.com/gentoo/gcc-patches";
+
+       # If we weren't given a patchset number, pull it from git too.
+       einfo "Fetching patchset from git as PATCH_VER is unset"
+       EGIT_REPO_URI=${gcc_patches_repo} EGIT_BRANCH="master" \
+               EGIT_CHECKOUT_DIR="${WORKDIR}"/patch.tmp \
+               git-r3_src_unpack
+
+       mkdir "${WORKDIR}"/patch || die
+       mv "${WORKDIR}"/patch.tmp/${PATCH_GCC_VER}/gentoo/* "${WORKDIR}"/patch 
|| die
+
+       if [[ -n ${MUSL_VER} || -d "${WORKDIR}"/musl ]] && [[ ${CTARGET} == 
*musl* ]] ; then
+               mkdir "${WORKDIR}"/musl || die
+               mv "${WORKDIR}"/patch.tmp/${PATCH_GCC_VER}/musl/* 
"${WORKDIR}"/musl || die
+       fi
 
        # yuck, but how else to do it portable?
        local realEPREFIX=$(python -c 'import os; 
print(os.path.realpath("'"${EPREFIX}"'"))')
@@ -450,37 +580,25 @@ toolchain_pkg_setup() {
        fi
 }
 
-#---->> src_unpack <<----
-
 toolchain_src_unpack() {
        if tc_is_live ; then
                git-r3_src_unpack
+
+               if [[ -z ${PATCH_VER} ]] && ! use vanilla ; then
+                       toolchain_fetch_git_patches
+               fi
+       elif [[ -z ${PATCH_VER} && -n ${TOOLCHAIN_USE_GIT_PATCHES} ]] ; then
+               toolchain_fetch_git_patches
        fi
 
-       default_src_unpack
+       default
 }
 
 #---->> src_prepare <<----
 
-# 'epatch' is not available in EAPI=7. Abstract away patchset application
-# until we eventually get all gcc ebuilds on EAPI=7 or later.
-tc_apply_patches() {
-       [[ ${#@} -lt 2 ]] && die "usage: tc_apply_patches <message> 
<patches...>"
-
-       einfo "$1"; shift
-
-       case ${EAPI:-0} in
-               # Note: even for EAPI=6 we used 'epatch' semantics. To avoid
-               # breaking existing ebuilds use 'eapply' only in EAPI=7 or 
later.
-               5*|6) epatch "$@" ;;
-               7) eapply "$@" ;;
-               *) die "Update apply_patches() for ${EAPI}." ;;
-       esac
-}
-
 toolchain_src_prepare() {
        export BRANDING_GCC_PKGVERSION="Gentoo ${GCC_PVR}"
-       cd "${S}"
+       cd "${S}" || die
 
        do_gcc_gentoo_patches
        do_gcc_PIE_patches
@@ -490,11 +608,7 @@ toolchain_src_prepare() {
                BRANDING_GCC_PKGVERSION="${BRANDING_GCC_PKGVERSION}, commit 
${EGIT_VERSION}"
        fi
 
-       case ${EAPI:-0} in
-               5*) epatch_user;;
-               6|7) eapply_user ;;
-               *) die "Update toolchain_src_prepare() for ${EAPI}." ;;
-       esac
+       eapply_user
 
        if ( tc_version_is_at_least 4.8.2 || _tc_use_if_iuse hardened ) \
                   && ! use vanilla ; then
@@ -509,11 +623,11 @@ toolchain_src_prepare() {
        sed -i -e "/\"\/System\/Library\/Frameworks\"\,/i\ \   
\"${EPREFIX}/MacOSX.sdk/System/Library/Frameworks\"\, 
\"${EPREFIX}/Frameworks\"\, " \
                "${S}"/gcc/config/darwin-c.c || die "sed gcc/config/darwin-c.c 
failed"
 
-       # make sure the pkg config files install into multilib dirs.
-       # since we configure with just one --libdir, we can't use that
-       # (as gcc itself takes care of building multilibs).  #435728
+       # Make sure the pkg-config files install into multilib dirs.
+       # Since we configure with just one --libdir, we can't use that
+       # (as gcc itself takes care of building multilibs). bug #435728
        find "${S}" -name Makefile.in \
-               -exec sed -i 
'/^pkgconfigdir/s:=.*:=$(toolexeclibdir)/pkgconfig:' {} +
+               -exec sed -i 
'/^pkgconfigdir/s:=.*:=$(toolexeclibdir)/pkgconfig:' {} + || die
 
        setup_multilib_osdirnames
        gcc_version_patch
@@ -546,7 +660,7 @@ toolchain_src_prepare() {
 
        gnuconfig_update
 
-       # update configure files
+       # Update configure files
        local f
        einfo "Fixing misc issues in configure files"
        for f in $(grep -l 'autoconf version 2.13' $(find "${S}" -name 
configure)) ; do
@@ -555,12 +669,12 @@ toolchain_src_prepare() {
                        || eerror "Please file a bug about this"
                eend $?
        done
-       sed -i 's|A-Za-z0-9|[:alnum:]|g' "${S}"/gcc/*.awk #215828
+       # bug #215828
+       sed -i 's|A-Za-z0-9|[:alnum:]|g' "${S}"/gcc/*.awk || die
 
-       # Prevent new texinfo from breaking old versions (see #198182, #464008)
-       if tc_version_is_at_least 4.1; then
-               tc_apply_patches "Remove texinfo (bug #198182, bug #464008)" 
"${FILESDIR}"/gcc-configure-texinfo.patch
-       fi
+       # Prevent new texinfo from breaking old versions (see #198182, bug 
#464008)
+       einfo "Remove texinfo (bug #198182, bug #464008)"
+       eapply "${FILESDIR}"/gcc-configure-texinfo.patch
 
        # >=gcc-4
        if [[ -x contrib/gcc_update ]] ; then
@@ -574,12 +688,28 @@ toolchain_src_prepare() {
 
 do_gcc_gentoo_patches() {
        if ! use vanilla ; then
-               if [[ -n ${PATCH_VER} ]] ; then
-                       tc_apply_patches "Applying Gentoo patches ..." 
"${WORKDIR}"/patch/*.patch
+               if [[ -n ${PATCH_VER} || -d "${WORKDIR}"/patch ]] ; then
+                       einfo "Applying Gentoo patches ..."
+                       eapply "${WORKDIR}"/patch/*.patch
                        BRANDING_GCC_PKGVERSION="${BRANDING_GCC_PKGVERSION} 
p${PATCH_VER}"
                fi
-               if [[ -n ${UCLIBC_VER} ]] ; then
-                       tc_apply_patches "Applying uClibc patches ..." 
"${WORKDIR}"/uclibc/*.patch
+
+               if [[ -n ${MUSL_VER} || -d "${WORKDIR}"/musl ]] && [[ 
${CTARGET} == *musl* ]] ; then
+                       if [[ ${CATEGORY} == cross-* ]] ; then
+                               # We don't want to apply some patches when 
cross-compiling.
+                               if [[ -d "${WORKDIR}"/musl/nocross ]] ; then
+                                       rm -fv 
"${WORKDIR}"/musl/nocross/*.patch || die
+                               else
+                                       # Just make an empty directory to make 
the glob below easier.
+                                       mkdir -p "${WORKDIR}"/musl/nocross || 
die
+                               fi
+                       fi
+
+                       local shopt_save=$(shopt -p nullglob)
+                       shopt -s nullglob
+                       einfo "Applying musl patches ..."
+                       eapply "${WORKDIR}"/musl/{,nocross/}*.patch
+                       ${shopt_save}
                fi
        fi
 }
@@ -588,7 +718,8 @@ do_gcc_PIE_patches() {
        want_pie || return 0
        use vanilla && return 0
 
-       tc_apply_patches "Applying pie patches ..." 
"${WORKDIR}"/piepatch/*.patch
+       einfo "Applying PIE patches ..."
+       eapply "${WORKDIR}"/piepatch/*.patch
 
        BRANDING_GCC_PKGVERSION="${BRANDING_GCC_PKGVERSION}, pie-${PIE_VER}"
 }
@@ -598,7 +729,7 @@ do_gcc_CYGWINPORTS_patches() {
        use elibc_Cygwin || return 0
 
        local p d="${WORKDIR}/gcc-${CYGWINPORTS_GITREV}"
-       # readarray -t is available since bash-4.4 only, #690686
+       # readarray -t is available since bash-4.4 only, bug #690686
        local patches=( $(
                for p in $(
                        sed -e '1,/PATCH_URI="/d;/"/,$d' < "${d}"/gcc.cygport
@@ -606,21 +737,23 @@ do_gcc_CYGWINPORTS_patches() {
                        echo "${d}/${p}"
                done
        ) )
-       tc_apply_patches "Applying cygwin port patches ..." ${patches[*]}
+       einfo "Applying cygwin port patches ..."
+       eapply -- "${patches[@]}"
 }
 
 # configure to build with the hardened GCC specs as the default
 make_gcc_hard() {
        local gcc_hard_flags=""
 
-       # If we use gcc-6 or newer with pie enable to compile older gcc we need 
to pass -no-pie
-       # to stage1; bug #618908
+       # If we use gcc-6 or newer with PIE enabled to compile older gcc,
+       # we need to pass -no-pie to stage1; bug #618908
        if ! tc_version_is_at_least 6.0 && [[ $(gcc-major-version) -ge 6 ]] ; 
then
                einfo "Disabling PIE in stage1 (only) ..."
                sed -i -e "/^STAGE1_LDFLAGS/ s/$/ -no-pie/" "${S}"/Makefile.in 
|| die
        fi
 
-       # Gcc >= 6.X we can use configurations options to turn pie/ssp on as 
default
+       # For gcc >= 6.x, we can use configuration options to turn PIE/SSP
+       # on as default
        if tc_version_is_at_least 6.0 ; then
                if _tc_use_if_iuse pie ; then
                        einfo "Updating gcc to use automatic PIE building ..."
@@ -630,16 +763,21 @@ make_gcc_hard() {
                fi
                if _tc_use_if_iuse hardened ; then
                        # Will add some hardened options as default, like:
-                       # -fstack-clash-protection
-                       # -z now
-                       # see *_all_extra-options.patch gcc patches.
+                       # * -fstack-clash-protection
+                       # * -z now
+                       # See gcc *_all_extra-options.patch patches.
                        gcc_hard_flags+=" -DEXTRA_OPTIONS"
-                       # rebrand to make bug reports easier
+
+                       if _tc_use_if_iuse cet && [[ ${CTARGET} == 
*x86_64*-linux* ]] ; then
+                               gcc_hard_flags+=" -DEXTRA_OPTIONS_CF"
+                       fi
+
+                       # Rebrand to make bug reports easier
                        
BRANDING_GCC_PKGVERSION=${BRANDING_GCC_PKGVERSION/Gentoo/Gentoo Hardened}
                fi
        else
                if _tc_use_if_iuse hardened ; then
-                       # rebrand to make bug reports easier
+                       # Rebrand to make bug reports easier
                        
BRANDING_GCC_PKGVERSION=${BRANDING_GCC_PKGVERSION/Gentoo/Gentoo Hardened}
                        if hardened_gcc_works ; then
                                einfo "Updating gcc to use automatic PIE + SSP 
building ..."
@@ -653,7 +791,7 @@ make_gcc_hard() {
                                ewarn "PIE has not been enabled by default"
                                gcc_hard_flags+=" -DEFAULT_SSP"
                        else
-                               # do nothing if hardened isn't supported, but 
don't die either
+                               # Do nothing if hardened isn't supported, but 
don't die either
                                ewarn "hardened is not supported for this arch 
in this gcc version"
                                return 0
                        fi
@@ -665,16 +803,16 @@ make_gcc_hard() {
                fi
        fi
 
-       # we want to be able to control the pie patch logic via something other
+       # We want to be able to control the PIE patch logic via something other
        # than ALL_CFLAGS...
        sed -e '/^ALL_CFLAGS/iHARD_CFLAGS = ' \
                -e 's|^ALL_CFLAGS = |ALL_CFLAGS = $(HARD_CFLAGS) |' \
-               -i "${S}"/gcc/Makefile.in
+               -i "${S}"/gcc/Makefile.in || die
        # Need to add HARD_CFLAGS to ALL_CXXFLAGS on >= 4.7
        if tc_version_is_at_least 4.7 ; then
                sed -e '/^ALL_CXXFLAGS/iHARD_CFLAGS = ' \
                        -e 's|^ALL_CXXFLAGS = |ALL_CXXFLAGS = $(HARD_CFLAGS) |' 
\
-                       -i "${S}"/gcc/Makefile.in
+                       -i "${S}"/gcc/Makefile.in || die
        fi
 
        sed -i \
@@ -703,13 +841,13 @@ setup_multilib_osdirnames() {
        local config
        local libdirs="../lib64 ../lib32"
 
-       # this only makes sense for some Linux targets
+       # This only makes sense for some Linux targets
        case ${CTARGET} in
-       x86_64*-linux*)    config="i386" ;;
-       powerpc64*-linux*) config="rs6000" ;;
-       sparc64*-linux*)   config="sparc" ;;
-       s390x*-linux*)     config="s390" ;;
-       *)                     return 0 ;;
+               x86_64*-linux*)    config="i386" ;;
+               powerpc64*-linux*) config="rs6000" ;;
+               sparc64*-linux*)   config="sparc" ;;
+               s390x*-linux*)     config="s390" ;;
+               *)                     return 0 ;;
        esac
        config+="/t-linux64"
 
@@ -718,14 +856,14 @@ setup_multilib_osdirnames() {
                sed_args+=( -e 's:$[(]call if_multiarch[^)]*[)]::g' )
        fi
        if [[ ${SYMLINK_LIB} == "yes" ]] ; then
-               einfo "updating multilib directories to be: ${libdirs}"
+               einfo "Updating multilib directories to be: ${libdirs}"
                if tc_version_is_at_least 4.6.4 || tc_version_is_at_least 4.7 ; 
then
                        sed_args+=( -e 
'/^MULTILIB_OSDIRNAMES.*lib32/s:[$][(]if.*):../lib32:' )
                else
                        sed_args+=( -e "/^MULTILIB_OSDIRNAMES/s:=.*:= 
${libdirs}:" )
                fi
        else
-               einfo "using upstream multilib; disabling lib32 autodetection"
+               einfo "Using upstream multilib; disabling lib32 autodetection"
                sed_args+=( -r -e 's:[$][(]if.*,(.*)[)]:\1:' )
        fi
        sed -i "${sed_args[@]}" "${S}"/gcc/config/${config} || die
@@ -737,7 +875,7 @@ gcc_version_patch() {
 
        local version_string=${GCC_RELEASE_VER}
 
-       einfo "patching gcc version: ${version_string} 
(${BRANDING_GCC_PKGVERSION})"
+       einfo "Patching gcc version: ${version_string} 
(${BRANDING_GCC_PKGVERSION})"
 
        local gcc_sed=( -e 's:gcc\.gnu\.org/bugs\.html:bugs\.gentoo\.org/:' )
        if grep -qs VERSUFFIX "${S}"/gcc/version.c ; then
@@ -760,10 +898,10 @@ toolchain_src_configure() {
        einfo "LDFLAGS=\"${LDFLAGS}\""
 
        # Force internal zip based jar script to avoid random
-       # issues with 3rd party jar implementations.  #384291
+       # issues with 3rd party jar implementations. bug #384291
        export JAR=no
 
-       # For hardened gcc 4.3 piepatchset to build the hardened specs
+       # For hardened gcc 4.3: add the pie patchset to build the hardened specs
        # file (build.specs) to use when building gcc.
        if ! tc_version_is_at_least 4.4 && want_minispecs ; then
                setup_minispecs_gcc_build_specs
@@ -771,6 +909,8 @@ toolchain_src_configure() {
 
        local confgcc=( --host=${CHOST} )
 
+       local build_config_targets=()
+
        if is_crosscompile || tc-is-cross-compiler ; then
                # Straight from the GCC install doc:
                # "GCC has code to correctly determine the correct value for 
target
@@ -810,16 +950,13 @@ toolchain_src_configure() {
        is_d   && GCC_LANG+=",d"
        is_gcj && GCC_LANG+=",java"
        is_go  && GCC_LANG+=",go"
-       is_jit && GCC_LANG+=",jit"
        if is_objc || is_objcxx ; then
                GCC_LANG+=",objc"
-               if tc_version_is_at_least 4 ; then
-                       use objc-gc && confgcc+=( --enable-objc-gc )
-               fi
+               use objc-gc && confgcc+=( --enable-objc-gc )
                is_objcxx && GCC_LANG+=",obj-c++"
        fi
 
-       # fortran support just got sillier! the lang value can be f77 for
+       # Fortran support just got sillier! The lang value can be f77 for
        # fortran77, f95 for fortran95, or just plain old fortran for the
        # currently supported standard depending on gcc version.
        is_fortran && GCC_LANG+=",fortran"
@@ -845,11 +982,11 @@ toolchain_src_configure() {
                confgcc+=( --disable-nls )
        fi
 
-       tc_version_is_at_least 3.4 || confgcc+=( --disable-libunwind-exceptions 
)
+       confgcc+=( --disable-libunwind-exceptions )
 
        # Use the default ("release") checking because upstream usually neglects
        # to test "disabled" so it has a history of breaking. bug #317217
-       if tc_version_is_at_least 3.4 && in_iuse debug ; then
+       if in_iuse debug ; then
                # The "release" keyword is new to 4.0. bug #551636
                local off=$(tc_version_is_at_least 4.0 && echo release || echo 
no)
                confgcc+=( --enable-checking="${GCC_CHECKS_LIST:-$(usex debug 
yes ${off})}" )
@@ -861,12 +998,12 @@ toolchain_src_configure() {
                --with-pkgversion="${BRANDING_GCC_PKGVERSION}"
        )
 
-       # If we want hardened support with the newer piepatchset for >=gcc 4.4
+       # If we want hardened support with the newer PIE patchset for >=gcc 4.4
        if tc_version_is_at_least 4.4 && want_minispecs && in_iuse hardened ; 
then
                confgcc+=( $(use_enable hardened esp) )
        fi
 
-       # allow gcc to search for clock funcs in the main C lib.
+       # Allow gcc to search for clock funcs in the main C lib.
        # if it can't find them, then tough cookies -- we aren't
        # going to link in -lrt to all C++ apps. bug #411681
        if tc_version_is_at_least 4.4 && is_cxx ; then
@@ -875,17 +1012,18 @@ toolchain_src_configure() {
 
        # Build compiler itself using LTO
        if tc_version_is_at_least 9.1 && _tc_use_if_iuse lto ; then
-               confgcc+=( --with-build-config=bootstrap-lto )
+               build_config_targets+=( bootstrap-lto )
+       fi
+
+       if tc_version_is_at_least 12 && _tc_use_if_iuse cet ; then
+               build_config_targets+=( bootstrap-cet )
        fi
 
-       # Support to disable pch when building libstdcxx
+       # Support to disable PCH when building libstdcxx
        if tc_version_is_at_least 6.0 && ! _tc_use_if_iuse pch ; then
                confgcc+=( --disable-libstdcxx-pch )
        fi
 
-       # The jit language requires this.
-       is_jit && confgcc+=( --enable-host-shared )
-
        # build-id was disabled for file collisions: bug #526144
        #
        # # Turn on the -Wl,--build-id flag by default for ELF targets. bug 
#525942
@@ -898,7 +1036,7 @@ toolchain_src_configure() {
        #       ;;
        # esac
 
-       # newer gcc versions like to bootstrap themselves with C++,
+       # Newer gcc versions like to bootstrap themselves with C++,
        # so we need to manually disable it ourselves
        if tc_version_is_between 4.7 4.8 && ! is_cxx ; then
                confgcc+=( --disable-build-with-cxx 
--disable-build-poststage1-with-cxx )
@@ -914,55 +1052,65 @@ toolchain_src_configure() {
                # disable a bunch of features or gcc goes boom
                local needed_libc=""
                case ${CTARGET} in
-               *-linux)                 needed_libc=error-unknown-libc;;
-               *-dietlibc)              needed_libc=dietlibc;;
-               *-elf|*-eabi)
-                       needed_libc=newlib
-                       # Bare-metal targets don't have access to 
clock_gettime()
-                       # arm-none-eabi example: bug #589672
-                       # But we explicitly do --enable-libstdcxx-time above.
-                       # Undoing it here.
-                       confgcc+=( --disable-libstdcxx-time )
-                       ;;
-               *-gentoo-freebsd*) needed_libc=freebsd-lib;;
-               *-gnu*)                  needed_libc=glibc;;
-               *-klibc)                 needed_libc=klibc;;
-               *-musl*)                 needed_libc=musl;;
-               *-uclibc*)
-                       # Enable shared library support only on targets
-                       # that support it: bug #291870
-                       if ! echo '#include <features.h>' | \
-                          $(tc-getCPP ${CTARGET}) -E -dD - 2>/dev/null | \
-                          grep -q __HAVE_SHARED__
-                       then
-                               confgcc+=( --disable-shared )
-                       fi
-                       needed_libc=uclibc-ng
-                       ;;
-               *-cygwin)                needed_libc=cygwin;;
-               x86_64-*-mingw*|\
-               *-w64-mingw*)    needed_libc=mingw64-runtime;;
-               mingw*|*-mingw*) needed_libc=mingw-runtime;;
-               avr)                     confgcc+=( --enable-shared 
--disable-threads );;
-               *-apple-darwin*) confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}" );;
-               *-solaris*)      confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}"
-                       );;
-               *-freebsd*)      confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}"
-               );;
+                       *-linux)
+                               needed_libc=error-unknown-libc
+                               ;;
+                       *-dietlibc)
+                               needed_libc=dietlibc
+                               ;;
+                       *-elf|*-eabi)
+                               needed_libc=newlib
+                               # Bare-metal targets don't have access to 
clock_gettime()
+                               # arm-none-eabi example: bug #589672
+                               # But we explicitly do --enable-libstdcxx-time 
above.
+                               # Undoing it here.
+                               confgcc+=( --disable-libstdcxx-time )
+                               ;;
+                       *-gnu*)
+                               needed_libc=glibc
+                               ;;
+                       *-klibc)
+                               needed_libc=klibc
+                               ;;
+                       *-musl*)
+                               needed_libc=musl
+                               ;;
+                       *-cygwin)
+                               needed_libc=cygwin
+                               ;;
+                       x86_64-*-mingw*|*-w64-mingw*)
+                               needed_libc=mingw64-runtime
+                               ;;
+                       avr)
+                               confgcc+=( --enable-shared --disable-threads )
+                               ;;
+                       # Prefix targets
+                       *-apple-darwin*)
+                               confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}" )
+                               ;;
+                       *-solaris*)
+                               confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}" )
+                               ;;
+                       *-freebsd*)
+                               confgcc+=( 
--with-sysroot="${EPREFIX}${PREFIX}/${CTARGET}" )
+                               ;;
                esac
+
                if [[ -n ${needed_libc} ]] ; then
                        local confgcc_no_libc=( --disable-shared )
                        # requires libc: bug #734820
                        tc_version_is_at_least 4.6 && confgcc_no_libc+=( 
--disable-libquadmath )
                        # requires libc
                        tc_version_is_at_least 4.8 && confgcc_no_libc+=( 
--disable-libatomic )
+
                        if ! has_version ${CATEGORY}/${needed_libc} ; then
                                confgcc+=(
                                        "${confgcc_no_libc[@]}"
                                        --disable-threads
                                        --without-headers
                                )
-                               if [[ $needed_libc == glibc ]]; then
+
+                               if [[ ${needed_libc} == glibc ]] ; then
                                        # By default gcc looks at glibc's 
headers
                                        # to detect long double support. This 
does
                                        # not work for --disable-headers mode.
@@ -980,7 +1128,7 @@ toolchain_src_configure() {
                        fi
                fi
 
-               tc_version_is_at_least 4.2 && confgcc+=( --disable-bootstrap )
+               confgcc+=( --disable-bootstrap )
        else
                if tc-is-static-only ; then
                        confgcc+=( --disable-shared )
@@ -988,10 +1136,12 @@ toolchain_src_configure() {
                        confgcc+=( --enable-shared )
                fi
                case ${CHOST} in
-               mingw*|*-mingw*)
-                       confgcc+=( --enable-threads=win32 ) ;;
-               *)
-                       confgcc+=( --enable-threads=posix ) ;;
+                       mingw*|*-mingw*)
+                               confgcc+=( --enable-threads=win32 )
+                               ;;
+                       *)
+                               confgcc+=( --enable-threads=posix )
+                               ;;
                esac
 
                if use prefix ; then
@@ -1012,39 +1162,21 @@ toolchain_src_configure() {
        # __cxa_atexit is "essential for fully standards-compliant handling of
        # destructors", but apparently requires glibc.
        case ${CTARGET} in
-       *-uclibc*)
-               if tc_has_feature nptl ; then
+               *-elf|*-eabi)
+                       confgcc+=( --with-newlib )
+                       ;;
+               *-musl*)
+                       confgcc+=( --enable-__cxa_atexit )
+                       ;;
+               *-gnu*)
                        confgcc+=(
-                               --disable-__cxa_atexit
-                               $(use_enable nptl tls)
+                               --enable-__cxa_atexit
+                               --enable-clocale=gnu
                        )
-               fi
-               tc_version_is_between 3.3 3.4 && confgcc+=( 
--enable-sjlj-exceptions )
-               if tc_version_is_between 3.4 4.3 ; then
-                       confgcc+=( --enable-clocale=uclibc )
-               fi
-               ;;
-       *-elf|*-eabi)
-               confgcc+=( --with-newlib )
-               ;;
-       *-musl*)
-               confgcc+=( --enable-__cxa_atexit )
-               ;;
-       *-gnu*)
-               confgcc+=(
-                       --enable-__cxa_atexit
-                       --enable-clocale=gnu
-               )
-               ;;
-       *-freebsd*)
-               confgcc+=( --enable-__cxa_atexit )
-               ;;
-       *-openbsd*)
-               confgcc+=( --enable-__cxa_atexit )
-               ;;
-       *-solaris*)
-               confgcc+=( --enable-__cxa_atexit )
-               ;;
+                       ;;
+               *-solaris*)
+                       confgcc+=( --enable-__cxa_atexit )
+                       ;;
        esac
 
        ### arch options
@@ -1057,102 +1189,117 @@ toolchain_src_configure() {
        tc_version_is_at_least 4.3 && in_iuse fixed-point && confgcc+=( 
$(use_enable fixed-point) )
 
        case $(tc-is-softfloat) in
-       yes)    confgcc+=( --with-float=soft ) ;;
-       softfp) confgcc+=( --with-float=softfp ) ;;
-       *)
-               # If they've explicitly opt-ed in, do hardfloat,
-               # otherwise let the gcc default kick in.
-               case ${CTARGET//_/-} in
-               *-hardfloat-*|*eabihf) confgcc+=( --with-float=hard ) ;;
-               esac
+               yes)
+                       confgcc+=( --with-float=soft )
+                       ;;
+               softfp)
+                       confgcc+=( --with-float=softfp )
+                       ;;
+               *)
+                       # If they've explicitly opt-ed in, do hardfloat,
+                       # otherwise let the gcc default kick in.
+                       case ${CTARGET//_/-} in
+                               *-hardfloat-*|*eabihf)
+                                       confgcc+=( --with-float=hard )
+                               ;;
+                       esac
        esac
 
        local with_abi_map=()
        case $(tc-arch) in
-       arm)    #264534 #414395
-               local a arm_arch=${CTARGET%%-*}
-               # Remove trailing endian variations first: eb el be bl b l
-               for a in e{b,l} {b,l}e b l ; do
-                       if [[ ${arm_arch} == *${a} ]] ; then
-                               arm_arch=${arm_arch%${a}}
-                               break
+               arm)
+                       # bug 264534, bug #414395
+                       local a arm_arch=${CTARGET%%-*}
+                       # Remove trailing endian variations first: eb el be bl 
b l
+                       for a in e{b,l} {b,l}e b l ; do
+                               if [[ ${arm_arch} == *${a} ]] ; then
+                                       arm_arch=${arm_arch%${a}}
+                                       break
+                               fi
+                       done
+
+                       # Convert armv6m to armv6-m
+                       [[ ${arm_arch} == armv6m ]] && arm_arch=armv6-m
+                       # Convert armv7{a,r,m} to armv7-{a,r,m}
+                       [[ ${arm_arch} == armv7? ]] && arm_arch=${arm_arch/7/7-}
+                       # See if this is a valid --with-arch flag
+                       if (srcdir=${S}/gcc target=${CTARGET} 
with_arch=${arm_arch};
+                           . "${srcdir}"/config.gcc) &>/dev/null
+                       then
+                               confgcc+=( --with-arch=${arm_arch} )
                        fi
-               done
-               # Convert armv7{a,r,m} to armv7-{a,r,m}
-               [[ ${arm_arch} == armv7? ]] && arm_arch=${arm_arch/7/7-}
-               # See if this is a valid --with-arch flag
-               if (srcdir=${S}/gcc target=${CTARGET} with_arch=${arm_arch};
-                   . "${srcdir}"/config.gcc) &>/dev/null
-               then
-                       confgcc+=( --with-arch=${arm_arch} )
-               fi
 
-               # Make default mode thumb for microcontroller classes #418209
-               [[ ${arm_arch} == *-m ]] && confgcc+=( --with-mode=thumb )
+                       # Make default mode thumb for microcontroller classes 
#418209
+                       [[ ${arm_arch} == *-m ]] && confgcc+=( 
--with-mode=thumb )
 
-               # Enable hardvfp
-               if [[ $(tc-is-softfloat) == "no" ]] && \
-                  [[ ${CTARGET} == armv[67]* ]] && \
-                  tc_version_is_at_least 4.5
-               then
-                       # Follow the new arm hardfp distro standard by default
-                       confgcc+=( --with-float=hard )
-                       case ${CTARGET} in
-                       armv6*) confgcc+=( --with-fpu=vfp ) ;;
-                       armv7*) confgcc+=( --with-fpu=vfpv3-d16 ) ;;
-                       esac
-               fi
-               ;;
-       mips)
-               # Add --with-abi flags to set default ABI
-               confgcc+=( --with-abi=$(gcc-abi-map ${TARGET_DEFAULT_ABI}) )
-               ;;
-       amd64)
-               # drop the older/ABI checks once this get's merged into some
-               # version of gcc upstream
-               if tc_version_is_at_least 4.8 && has x32 $(get_all_abis TARGET) 
; then
+                       # Enable hardvfp
+                       if [[ $(tc-is-softfloat) == "no" ]] && \
+                          [[ ${CTARGET} == armv[67]* ]] && \
+                          tc_version_is_at_least 4.5
+                       then
+                               # Follow the new arm hardfp distro standard by 
default
+                               confgcc+=( --with-float=hard )
+                               case ${CTARGET} in
+                                       armv6*) confgcc+=( --with-fpu=vfp ) ;;
+                                       armv7*) confgcc+=( --with-fpu=vfpv3-d16 
) ;;
+                               esac
+                       fi
+                       ;;
+               mips)
+                       # Add --with-abi flags to set default ABI
                        confgcc+=( --with-abi=$(gcc-abi-map 
${TARGET_DEFAULT_ABI}) )
-               fi
-               ;;
-       x86)
-               # Default arch for x86 is normally i386, lets give it a bump
-               # since glibc will do so based on CTARGET anyways
-               confgcc+=( --with-arch=${CTARGET%%-*} )
-               ;;
-       hppa)
-               # Enable sjlj exceptions for backward compatibility on hppa
-               [[ ${GCCMAJOR} == "3" ]] && confgcc+=( --enable-sjlj-exceptions 
)
-               ;;
-       ppc)
-               # Set up defaults based on current CFLAGS
-               is-flagq -mfloat-gprs=double && confgcc+=( --enable-e500-double 
)
-               [[ ${CTARGET//_/-} == *-e500v2-* ]] && confgcc+=( 
--enable-e500-double )
-               ;;
-       ppc64)
-               # On ppc64 big endian target gcc assumes elfv1 by default,
-               # and elfv2 on little endian
-               # but musl does not support elfv1 at all on any endian ppc64
-               # see https://git.musl-libc.org/cgit/musl/tree/INSTALL
-               # https://bugs.gentoo.org/704784
-               # https://gcc.gnu.org/PR93157
-               [[ ${CTARGET} == powerpc64-*-musl ]] && confgcc+=( 
--with-abi=elfv2 )
-               ;;
-       riscv)
-               # Add --with-abi flags to set default ABI
-               confgcc+=( --with-abi=$(gcc-abi-map ${TARGET_DEFAULT_ABI}) )
-               ;;
+                       ;;
+
+               amd64)
+                       # drop the older/ABI checks once this get's merged into 
some
+                       # version of gcc upstream
+                       if tc_version_is_at_least 4.8 && has x32 $(get_all_abis 
TARGET) ; then
+                               confgcc+=( --with-abi=$(gcc-abi-map 
${TARGET_DEFAULT_ABI}) )
+                       fi
+                       ;;
+               x86)
+                       # Default arch for x86 is normally i386, lets give it a 
bump
+                       # since glibc will do so based on CTARGET anyways
+                       confgcc+=( --with-arch=${CTARGET%%-*} )
+                       ;;
+               hppa)
+                       # Enable sjlj exceptions for backward compatibility on 
hppa
+                       [[ ${GCCMAJOR} == "3" ]] && confgcc+=( 
--enable-sjlj-exceptions )
+                       ;;
+               ppc)
+                       # Set up defaults based on current CFLAGS
+                       is-flagq -mfloat-gprs=double && confgcc+=( 
--enable-e500-double )
+                       [[ ${CTARGET//_/-} == *-e500v2-* ]] && confgcc+=( 
--enable-e500-double )
+                       ;;
+               ppc64)
+                       # On ppc64 big endian target gcc assumes elfv1 by 
default,
+                       # and elfv2 on little endian
+                       # but musl does not support elfv1 at all on any endian 
ppc64
+                       # see https://git.musl-libc.org/cgit/musl/tree/INSTALL
+                       # bug #704784
+                       # https://gcc.gnu.org/PR93157
+                       [[ ${CTARGET} == powerpc64-*-musl ]] && confgcc+=( 
--with-abi=elfv2 )
+                       ;;
+               riscv)
+                       # Add --with-abi flags to set default ABI
+                       confgcc+=( --with-abi=$(gcc-abi-map 
${TARGET_DEFAULT_ABI}) )
+                       ;;
        esac
 
        # if the target can do biarch (-m32/-m64), enable it.  overhead should
        # be small, and should simplify building of 64bit kernels in a 32bit
-       # userland by not needing sys-devel/kgcc64.  #349405
-       if use !prefix ; then #406689
+       # userland by not needing sys-devel/kgcc64. bug #349405
        case $(tc-arch) in
-       ppc|ppc64) tc_version_is_at_least 3.4 && confgcc+=( 
--enable-targets=all ) ;;
-       sparc)     tc_version_is_at_least 4.4 && confgcc+=( 
--enable-targets=all ) ;;
-       amd64|x86) tc_version_is_at_least 4.3 && confgcc+=( 
--enable-targets=all ) ;;
+               ppc|ppc64)
+                       confgcc+=( --enable-targets=all )
+                       ;;
+               sparc)
+                       tc_version_is_at_least 4.4 && confgcc+=( 
--enable-targets=all )
+                       ;;
+               amd64|x86)
+                       tc_version_is_at_least 4.3 && confgcc+=( 
--enable-targets=all )
+                       ;;
        esac
-       fi
 
        # On Darwin we need libdir to be set in order to get correct install 
names
        # for things like libobjc-gnu, libgcj and libfortran.  If we enable it 
on
@@ -1172,47 +1319,44 @@ toolchain_src_configure() {
                fi
        fi
 
-       if tc_version_is_at_least 4.2 ; then
-               if in_iuse openmp ; then
-                       # Make sure target has pthreads support. #326757 #335883
-                       # There shouldn't be a chicken & egg problem here as 
openmp won't
-                       # build without a C library, and you can't build that 
w/out
-                       # already having a compiler ...
-                       if ! is_crosscompile || \
-                          $(tc-getCPP ${CTARGET}) -E - <<<"#include 
<pthread.h>" >& /dev/null
-                       then
-                               confgcc+=( $(use_enable openmp libgomp) )
-                       else
-                               # Force disable as the configure script can be 
dumb #359855
-                               confgcc+=( --disable-libgomp )
-                       fi
+       if in_iuse openmp ; then
+               # Make sure target has pthreads support: bug #326757, bug 
#335883
+               # There shouldn't be a chicken & egg problem here as openmp 
won't
+               # build without a C library, and you can't build that w/out
+               # already having a compiler ...
+               if ! is_crosscompile || \
+                  $(tc-getCPP ${CTARGET}) -E - <<<"#include <pthread.h>" >& 
/dev/null
+               then
+                       confgcc+=( $(use_enable openmp libgomp) )
                else
-                       # For gcc variants where we don't want openmp (e.g. 
kgcc)
+                       # Force disable as the configure script can be dumb 
#359855
                        confgcc+=( --disable-libgomp )
                fi
+       else
+               # For gcc variants where we don't want openmp (e.g. kgcc)
+               confgcc+=( --disable-libgomp )
        fi
 
-       if tc_version_is_at_least 4.0 ; then
-               if _tc_use_if_iuse libssp ; then
-                       confgcc+=( --enable-libssp )
+       if _tc_use_if_iuse libssp ; then
+               confgcc+=( --enable-libssp )
+       else
+               if hardened_gcc_is_stable ssp; then
+                       export gcc_cv_libc_provides_ssp=yes
+               fi
+               if _tc_use_if_iuse ssp; then
+                       # On some targets USE="ssp -libssp" is an invalid
+                       # configuration as target libc does not provide
+                       # stack_chk_* functions. Do not disable libssp there.
+                       case ${CTARGET} in
+                               mingw*|*-mingw*)
+                                       ewarn "Not disabling libssp"
+                                       ;;
+                               *)
+                                       confgcc+=( --disable-libssp )
+                                       ;;
+                       esac
                else
-                       # Not all libcs have ssp built in.  I assume only glibc 
has
-                       # this for now.
-                       use elibc_glibc &&
-                       if hardened_gcc_is_stable ssp; then
-                               export gcc_cv_libc_provides_ssp=yes
-                       fi
-                       if _tc_use_if_iuse ssp; then
-                               # On some targets USE="ssp -libssp" is an 
invalid
-                               # configuration as target libc does not provide
-                               # stack_chk_* functions. Do not disable libssp 
there.
-                               case ${CTARGET} in
-                                       mingw*|*-mingw*) ewarn "Not disabling 
libssp" ;;
-                                       *) confgcc+=( --disable-libssp ) ;;
-                               esac
-                       else
-                               confgcc+=( --disable-libssp )
-                       fi
+                       confgcc+=( --disable-libssp )
                fi
        fi
 
@@ -1220,6 +1364,10 @@ toolchain_src_configure() {
                confgcc+=( --disable-libada )
        fi
 
+       if in_iuse cet ; then
+               confgcc+=( $(use_enable cet) )
+       fi
+
        if in_iuse cilk ; then
                confgcc+=( $(use_enable cilk libcilkrts) )
        fi
@@ -1248,6 +1396,8 @@ toolchain_src_configure() {
                confgcc+=( $(use_with zstd) )
        fi
 
+       # This only controls whether the compiler *supports* LTO, not whether
+       # it's *built using* LTO. Hence we do it without a USE flag.
        if tc_version_is_at_least 4.6 ; then
                confgcc+=( --enable-lto )
        elif tc_version_is_at_least 4.5 ; then
@@ -1255,7 +1405,7 @@ toolchain_src_configure() {
        fi
 
        # graphite was added in 4.4 but we only support it in 6.5+ due to 
external
-       # library issues.  #448024, #701270
+       # library issues. bug #448024, bug #701270
        if tc_version_is_at_least 6.5 && in_iuse graphite ; then
                confgcc+=( $(use_with graphite isl) )
                use graphite && confgcc+=( --disable-isl-version-check )
@@ -1288,7 +1438,7 @@ toolchain_src_configure() {
        fi
 
        # Disable gcc info regeneration -- it ships with generated info pages
-       # already.  Our custom version/urls/etc... trigger it.  #464008
+       # already.  Our custom version/urls/etc... trigger it. bug #464008
        export gcc_cv_prog_makeinfo_modern=no
 
        # Do not let the X detection get in our way.  We know things can be 
found
@@ -1299,6 +1449,11 @@ toolchain_src_configure() {
 
        confgcc+=( "$@" ${EXTRA_ECONF} )
 
+       if [[ -n ${build_config_targets} ]] ; then
+               # ./configure --with-build-config='bootstrap-lto bootstrap-cet'
+               confgcc+=( --with-build-config="${build_config_targets[*]}" )
+       fi
+
        # Nothing wrong with a good dose of verbosity
        echo
        einfo "PREFIX:          ${PREFIX}"
@@ -1309,23 +1464,45 @@ toolchain_src_configure() {
        echo
        einfo "Languages:       ${GCC_LANG}"
        echo
-       einfo "Configuring GCC with: ${confgcc[@]//--/\n\t--}"
-       echo
 
        # Build in a separate build tree
-       mkdir -p "${WORKDIR}"/build
+       mkdir -p "${WORKDIR}"/build || die
        pushd "${WORKDIR}"/build > /dev/null
 
-       # and now to do the actual configuration
+       # ...and now to do the actual configuration
        addwrite /dev/zero
-       echo "${S}"/configure "${confgcc[@]}"
+
+       local gcc_shell="${BROOT}"/bin/bash
        # Older gcc versions did not detect bash and re-exec itself, so force 
the
-       # use of bash.  Newer ones will auto-detect, but this is not harmful.
-       CONFIG_SHELL="${EPREFIX}/bin/bash" \
-       bash "${S}"/configure "${confgcc[@]}" || die "failed to run configure"
+       # use of bash for them.
+       if tc_version_is_at_least 11.2 ; then
+               gcc_shell="${BROOT}"/bin/sh
+       fi
 
-       # return to whatever directory we were in before
-       popd > /dev/null
+       if is_jit ; then
+               einfo "Configuring JIT gcc"
+
+               mkdir -p "${WORKDIR}"/build-jit || die
+               pushd "${WORKDIR}"/build-jit > /dev/null || die
+               CONFIG_SHELL="${gcc_shell}" edo "${gcc_shell}" "${S}"/configure 
\
+                               "${confgcc[@]}" \
+                               --disable-libada \
+                               --disable-libsanitizer \
+                               --disable-libvtv \
+                               --disable-libgomp \
+                               --disable-libquadmath \
+                               --disable-libatomic \
+                               --disable-lto \
+                               --disable-bootstrap \
+                               --enable-host-shared \
+                               --enable-languages=jit
+               popd > /dev/null || die
+       fi
+
+       CONFIG_SHELL="${gcc_shell}" edo "${gcc_shell}" "${S}"/configure 
"${confgcc[@]}"
+
+       # Return to whatever directory we were in before
+       popd > /dev/null || die
 }
 
 # Replace -m flags unsupported by the version being built with the best
@@ -1341,20 +1518,9 @@ downgrade_arch_flags() {
        myarch=$(get-flag march)
        mytune=$(get-flag mtune)
 
-       # If -march=native isn't supported we have to tease out the actual arch
-       if [[ ${myarch} == native || ${mytune} == native ]] ; then
-               if ! tc_version_is_at_least 4.2 ${bver}; then
-                       arch=$($(tc-getCC) -march=native -v -E -P - </dev/null 
2>&1 \
-                               | sed -rn "/cc1.*-march/s:.*-march=([^ 
']*).*:\1:p")
-                       replace-cpu-flags native ${arch}
-               fi
-       fi
-
        # Handle special -mtune flags
        [[ ${mytune} == intel ]] && ! tc_version_is_at_least 4.9 ${bver} && 
replace-cpu-flags intel generic
-       [[ ${mytune} == generic ]] && ! tc_version_is_at_least 4.2 ${bver} && 
filter-flags '-mtune=*'
        [[ ${mytune} == x86-64 ]] && filter-flags '-mtune=*'
-       tc_version_is_at_least 3.4 ${bver} || filter-flags '-mtune=*'
 
        # "added" "arch" "replacement"
        local archlist=(
@@ -1386,14 +1552,6 @@ downgrade_arch_flags() {
                4.3 geode k6-2 # gcc.gnu.org/PR41989#c22
                4.3 k8-sse3 k8
                4.3 opteron-sse3 k8
-               3.4 athlon-fx x86-64
-               3.4 athlon64 x86-64
-               3.4 c3-2 c3
-               3.4 k8 x86-64
-               3.4 opteron x86-64
-               3.4 pentium-m pentium3
-               3.4 pentium3m pentium3
-               3.4 pentium4m pentium4
        )
 
        for ((i = 0; i < ${#archlist[@]}; i += 3)) ; do
@@ -1416,7 +1574,7 @@ downgrade_arch_flags() {
                fi
        done
 
-       # we only check -mno* here since -m* get removed by strip-flags later on
+       # We only check -mno* here since -m* get removed by strip-flags later on
        local isalist=(
                4.9 -mno-sha
                4.9 -mno-avx512pf
@@ -1468,35 +1626,21 @@ gcc_do_filter_flags() {
                # relating to failed builds, we strip most CFLAGS out to ensure 
as few
                # problems as possible.
                strip-flags
+
                # Lock gcc at -O2; we want to be conservative here.
                filter-flags '-O?'
                append-flags -O2
        fi
 
-       # dont want to funk ourselves
+       # Don't want to funk ourselves
        filter-flags '-mabi*' -m31 -m32 -m64
 
-       filter-flags -frecord-gcc-switches # 490738
-       filter-flags -mno-rtm -mno-htm # 506202
+       # bug #490738
+       filter-flags -frecord-gcc-switches
+       # bug #506202
+       filter-flags -mno-rtm -mno-htm
 
-       if tc_version_is_between 3.2 3.4 ; then
-               # XXX: this is so outdated it's barely useful, but it don't 
hurt...
-               replace-cpu-flags G3 750
-               replace-cpu-flags G4 7400
-               replace-cpu-flags G5 7400
-
-               # XXX: should add a sed or something to query all supported 
flags
-               #      from the gcc source and trim everything else ...
-               filter-flags -f{no-,}unit-at-a-time -f{no-,}web 
-mno-tls-direct-seg-refs
-               filter-flags -f{no-,}stack-protector{,-all}
-               filter-flags -fvisibility-inlines-hidden -fvisibility=hidden
-               # and warning options
-               filter-flags -Wextra -Wstack-protector
-       fi
-       if ! tc_version_is_at_least 4.1 ; then
-               filter-flags -fdiagnostics-show-option
-               filter-flags -Wstack-protector
-       fi
+       filter-flags '-fsanitize=*'
 
        if tc_version_is_between 6 8 ; then
                # -mstackrealign triggers crashes in exception throwing
@@ -1505,40 +1649,37 @@ gcc_do_filter_flags() {
                filter-flags -mstackrealign
        fi
 
-       if tc_version_is_at_least 3.4 ; then
-               case $(tc-arch) in
-                       amd64|x86)
-                               filter-flags '-mcpu=*'
+       case $(tc-arch) in
+               amd64|x86)
+                       filter-flags '-mcpu=*'
 
-                               tc_version_is_between 4.4 4.5 && append-flags 
-mno-avx # 357287
+                       # bug #357287
+                       tc_version_is_between 4.4 4.5 && append-flags -mno-avx
 
-                               if tc_version_is_between 4.6 4.7 ; then
-                                       # https://bugs.gentoo.org/411333
-                                       # https://bugs.gentoo.org/466454
-                                       replace-cpu-flags c3-2 pentium2 
pentium3 pentium3m pentium-m i686
-                               fi
-                               ;;
-                       alpha)
-                               # https://bugs.gentoo.org/454426
-                               append-ldflags -Wl,--no-relax
-                               ;;
-                       sparc)
-                               # temporary workaround for random ICEs 
reproduced by multiple users
-                               # https://bugs.gentoo.org/457062
-                               tc_version_is_between 4.6 4.8 && MAKEOPTS+=" 
-j1"
-                               ;;
-                       *-macos)
-                               # http://gcc.gnu.org/PR25127
-                               # used to break on 4.1 4.2 now breaks on 10 
too, so
-                               # filter everywhere
+                       if tc_version_is_between 4.6 4.7 ; then
+                               # bug #411333, bug #466454
+                               replace-cpu-flags c3-2 pentium2 pentium3 
pentium3m pentium-m i686
+                       fi
+                       ;;
+               alpha)
+                       # bug #454426
+                       append-ldflags -Wl,--no-relax
+                       ;;
+               sparc)
+                       # Temporary workaround for random ICEs reproduced by 
multiple users
+                       # bug #457062
+                       tc_version_is_between 4.6 4.8 && MAKEOPTS+=" -j1"
+                       ;;
+               *-macos)
+                       # https://gcc.gnu.org/PR25127
+                       tc_version_is_between 4.0 4.2 && \
                                filter-flags '-mcpu=*' '-march=*' '-mtune=*'
-                               ;;
-               esac
-       fi
+                       ;;
+       esac
 
        strip-unsupported-flags
 
-       # these are set here so we have something sane at configure time
+       # These are set here so we have something sane at configure time
        if is_crosscompile ; then
                # Set this to something sane for both native and target
                CFLAGS="-O2 -pipe"
@@ -1580,7 +1721,7 @@ gcc-multilib-configure() {
                confgcc+=( --enable-multilib )
        fi
 
-       # translate our notion of multilibs into gcc's
+       # Translate our notion of multilibs into gcc's
        local abi list
        for abi in $(get_all_abis TARGET) ; do
                local l=$(gcc-abi-map ${abi})
@@ -1599,9 +1740,15 @@ gcc-abi-map() {
        # Convert the ABI name we use in Gentoo to what gcc uses
        local map=()
        case ${CTARGET} in
-       mips*)   map=("o32 32" "n32 n32" "n64 64") ;;
-       riscv*)  map=("lp64d lp64d" "lp64 lp64" "ilp32d ilp32d" "ilp32 ilp32") 
;;
-       x86_64*) map=("amd64 m64" "x86 m32" "x32 mx32") ;;
+               mips*)
+                       map=("o32 32" "n32 n32" "n64 64")
+                       ;;
+               riscv*)
+                       map=("lp64d lp64d" "lp64 lp64" "ilp32d ilp32d" "ilp32 
ilp32")
+                       ;;
+               x86_64*)
+                       map=("amd64 m64" "x86 m32" "x32 mx32")
+                       ;;
        esac
 
        local m
@@ -1628,9 +1775,9 @@ toolchain_src_compile() {
        # Older gcc versions did not detect bash and re-exec itself, so force 
the
        # use of bash.  Newer ones will auto-detect, but this is not harmful.
        # This needs to be set for compile as well, as it's used in libtool
-       # generation, which will break install otherwise (at least in 3.3.6): 
#664486
-       CONFIG_SHELL="${EPREFIX}/bin/bash" \
-       gcc_do_make ${GCC_MAKE_TARGET}
+       # generation, which will break install otherwise (at least in 3.3.6): 
bug #664486
+       CONFIG_SHELL="${BROOT}/bin/bash" \
+               gcc_do_make ${GCC_MAKE_TARGET}
 }
 
 gcc_do_make() {
@@ -1645,11 +1792,11 @@ gcc_do_make() {
 
        # default target
        if is_crosscompile || tc-is-cross-compiler ; then
-               # 3 stage bootstrapping doesnt quite work when you cant run the
-               # resulting binaries natively ^^;
+               # 3 stage bootstrapping doesn't quite work when you can't run 
the
+               # resulting binaries natively
                GCC_MAKE_TARGET=${GCC_MAKE_TARGET-all}
        else
-               if tc_version_is_at_least 3.3 && _tc_use_if_iuse pgo; then
+               if _tc_use_if_iuse pgo; then
                        GCC_MAKE_TARGET=${GCC_MAKE_TARGET-profiledbootstrap}
                else
                        GCC_MAKE_TARGET=${GCC_MAKE_TARGET-bootstrap-lean}
@@ -1680,6 +1827,19 @@ gcc_do_make() {
                BOOT_CFLAGS=${BOOT_CFLAGS-"$(get_abi_CFLAGS 
${TARGET_DEFAULT_ABI}) ${CFLAGS}"}
        fi
 
+       if is_jit ; then
+               # TODO: docs for jit?
+               pushd "${WORKDIR}"/build-jit > /dev/null || die
+
+               einfo "Building JIT"
+               emake \
+                       LDFLAGS="${LDFLAGS}" \
+                       STAGE1_CFLAGS="${STAGE1_CFLAGS}" \
+                       LIBPATH="${LIBPATH}" \
+                       BOOT_CFLAGS="${BOOT_CFLAGS}"
+               popd > /dev/null || die
+        fi
+
        einfo "Compiling ${PN} (${GCC_MAKE_TARGET})..."
 
        pushd "${WORKDIR}"/build >/dev/null
@@ -1692,8 +1852,7 @@ gcc_do_make() {
                STAGE1_CFLAGS="${STAGE1_CFLAGS}" \
                LIBPATH="${LIBPATH}" \
                BOOT_CFLAGS="${BOOT_CFLAGS}" \
-               ${GCC_MAKE_TARGET} \
-               || die "emake failed with ${GCC_MAKE_TARGET}"
+               ${GCC_MAKE_TARGET}
 
        if is_ada; then
                # Without these links it is not getting the good compiler
@@ -1710,16 +1869,17 @@ gcc_do_make() {
                if type -p doxygen > /dev/null ; then
                        if tc_version_is_at_least 4.3 ; then
                                cd "${CTARGET}"/libstdc++-v3/doc
-                               emake doc-man-doxygen || ewarn "failed to make 
docs"
-                       elif tc_version_is_at_least 3.0 ; then
+                               emake doc-man-doxygen
+                       else
                                cd "${CTARGET}"/libstdc++-v3
-                               emake doxygen-man || ewarn "failed to make docs"
+                               emake doxygen-man
                        fi
-                       # Clean bogus manpages.  #113902
+                       # Clean bogus manpages. bug #113902
                        find -name '*_build_*' -delete
-                       # Blow away generated directory references.  Newer 
versions of gcc
-                       # have gotten better at this, but not perfect.  This is 
easier than
-                       # backporting all of the various doxygen patches.  
#486754
+
+                       # Blow away generated directory references. Newer 
versions of gcc
+                       # have gotten better at this, but not perfect. This is 
easier than
+                       # backporting all of the various doxygen patches. bug 
#486754
                        find -name '*_.3' -exec grep -l ' Directory Reference ' 
{} + | \
                                xargs rm -f
                else
@@ -1734,6 +1894,7 @@ gcc_do_make() {
 
 toolchain_src_test() {
        cd "${WORKDIR}"/build
+
        # 'asan' wants to be preloaded first, so does 'sandbox'.
        # To make asan tests work disable sandbox for all of test suite.
        # 'backtrace' tests also does not like 'libsandbox.so' presence.
@@ -1746,12 +1907,10 @@ toolchain_src_install() {
        cd "${WORKDIR}"/build
 
        # Don't allow symlinks in private gcc include dir as this can break the 
build
-       # Keep them in prefix for things like 'machine->ia64' #gcc PR26189
-       use prefix ||
        find gcc/include*/ -type l -delete
 
        # Copy over the info pages.  We disabled their generation earlier, but 
the
-       # build system only expects to install out of the build dir, not the 
source.  #464008
+       # build system only expects to install out of the build dir, not the 
source. bug #464008
        mkdir -p gcc/doc
        local x=
        for x in "${S}"/gcc/doc/*.info* ; do
@@ -1771,8 +1930,32 @@ toolchain_src_install() {
                        && use !prefix && rm -f "${x}"
        done < <(find gcc/include*/ -name '*.h')
 
+       if is_jit ; then
+               # See 
https://gcc.gnu.org/onlinedocs/gcc-11.3.0/jit/internals/index.html#packaging-notes
+               # and bug #843341.
+               #
+               # Both of the non-JIT and JIT builds  are configured to install 
to $(DESTDIR)
+               # Install the configuration with --enable-host-shared first
+               # *then* the one without, so that the faster build
+               # of "cc1" et al overwrites the slower build.
+               #
+               # Do the 'make install' from the build directory
+               pushd "${WORKDIR}"/build-jit > /dev/null || die
+               S="${WORKDIR}"/build-jit emake DESTDIR="${D}" install
+
+               # Punt some tools which are really only useful while building 
gcc
+               find "${ED}" -name install-tools -prune -type d -exec rm -rf 
"{}" \;
+               # This one comes with binutils
+               find "${ED}" -name libiberty.a -delete
+
+               # Move the libraries to the proper location
+               gcc_movelibs
+
+               popd > /dev/null || die
+       fi
+
        # Do the 'make install' from the build directory
-       S="${WORKDIR}"/build emake -j1 DESTDIR="${D}" install || die
+       S="${WORKDIR}"/build emake DESTDIR="${D}" install
 
        # Punt some tools which are really only useful while building gcc
        find "${ED}" -name install-tools -prune -type d -exec rm -rf "{}" \;
@@ -1796,7 +1979,7 @@ toolchain_src_install() {
        # Setup the gcc_env_entry for hardened gcc 4 with minispecs
        want_minispecs && copy_minispecs_gcc_specs
 
-       # Make sure we dont have stuff lying around that
+       # Make sure we don't have stuff lying around that
        # can nuke multiple versions of gcc
        gcc_slot_java
 
@@ -1835,7 +2018,7 @@ toolchain_src_install() {
        # When cross-building gcc does install native tools.
        if ! is_crosscompile; then
                # Rename the main go binaries as we don't want to clobber 
dev-lang/go
-               # when gcc-config runs. #567806
+               # when gcc-config runs. bug #567806
                if tc_version_is_at_least 5 && is_go ; then
                        for x in go gofmt; do
                                mv ${x} ${x}-${GCCMAJOR} || die
@@ -1843,7 +2026,7 @@ toolchain_src_install() {
                fi
        fi
 
-       # As gcc installs object files built against bost ${CHOST} and 
${CTARGET}
+       # As gcc installs object files built against both ${CHOST} and 
${CTARGET}
        # ideally we will need to strip them using different tools:
        # Using ${CHOST} tools:
        #  - "${D}${BINPATH}"
@@ -1853,29 +2036,27 @@ toolchain_src_install() {
        #  - "${D}${LIBPATH}"
        # As dostrip does not specify host to override ${CHOST} tools just skip
        # non-native binary stripping.
-       is_crosscompile && tc_supports_dostrip && dostrip -x "${LIBPATH}"
+       is_crosscompile && dostrip -x "${LIBPATH}"
 
-       cd "${S}"
+       cd "${S}" || die
        if is_crosscompile; then
                rm -rf "${ED}"/usr/share/{man,info}
                rm -rf "${D}"${DATAPATH}/{man,info}
        else
-               if tc_version_is_at_least 3.0 ; then
-                       local cxx_mandir=$(find 
"${WORKDIR}/build/${CTARGET}/libstdc++-v3" -name man)
-                       if [[ -d ${cxx_mandir} ]] ; then
-                               cp -r "${cxx_mandir}"/man? 
"${D}${DATAPATH}"/man/
-                       fi
+               local cxx_mandir=$(find 
"${WORKDIR}/build/${CTARGET}/libstdc++-v3" -name man)
+               if [[ -d ${cxx_mandir} ]] ; then
+                       cp -r "${cxx_mandir}"/man? "${D}${DATAPATH}"/man/
                fi
        fi
 
-       # portage regenerates 'dir' files on it's own: bug #672408
+       # Portage regenerates 'dir' files on its own: bug #672408
        # Drop 'dir' files to avoid collisions.
        if [[ -f "${D}${DATAPATH}"/info/dir ]]; then
                einfo "Deleting '${D}${DATAPATH}/info/dir'"
                rm "${D}${DATAPATH}"/info/dir || die
        fi
 
-       # prune empty dirs left behind
+       # Prune empty dirs left behind
        find "${ED}" -depth -type d -delete 2>/dev/null
 
        # libstdc++.la: Delete as it doesn't add anything useful: g++ itself
@@ -1891,14 +2072,14 @@ toolchain_src_install() {
        # libgomp-plugin-*.la: Same as above, and it's an internal plugin only
        # loaded via dlopen.
        # libgfortran.la: gfortran itself handles linkage correctly in the
-       # dynamic & static case (libgfortran.spec). #573302
+       # dynamic & static case (libgfortran.spec). bug #573302
        # libgfortranbegin.la: Same as above, and it's an internal lib.
        # libmpx.la: gcc itself handles linkage correctly (libmpx.spec).
        # libmpxwrappers.la: See above.
        # libitm.la: gcc itself handles linkage correctly (libitm.spec).
        # libvtv.la: gcc itself handles linkage correctly.
        # lib*san.la: Sanitizer linkage is handled internally by gcc, and they
-       # do not support static linking. #487550 #546700
+       # do not support static linking. bug #487550, bug #546700
        find "${D}${LIBPATH}" \
                '(' \
                        -name libstdc++.la -o \
@@ -1928,9 +2109,12 @@ toolchain_src_install() {
        pushd "${D}${LIBPATH}" >/dev/null
        for py in $(find . -name '*-gdb.py') ; do
                local multidir=${py%/*}
+
                insinto "${gdbdir}/${multidir}"
-               sed -i "/^libdir =/s:=.*:= '${LIBPATH}/${multidir}':" "${py}" 
|| die #348128
-               doins "${py}" || die
+               # bug #348128
+               sed -i "/^libdir =/s:=.*:= '${LIBPATH}/${multidir}':" "${py}" 
|| die
+               doins "${py}"
+
                rm "${py}" || die
        done
        popd >/dev/null
@@ -1939,13 +2123,13 @@ toolchain_src_install() {
        export QA_EXECSTACK="usr/lib*/go/*/*.gox"
        export QA_WX_LOAD="usr/lib*/go/*/*.gox"
 
-       # Disable RANDMMAP so PCH works. #301299
+       # Disable RANDMMAP so PCH works, bug #301299
        if tc_version_is_at_least 4.3 ; then
                pax-mark -r 
"${D}${PREFIX}/libexec/gcc/${CTARGET}/${GCC_CONFIG_VER}/cc1"
                pax-mark -r 
"${D}${PREFIX}/libexec/gcc/${CTARGET}/${GCC_CONFIG_VER}/cc1plus"
        fi
 
-       # Disable MPROTECT so java works. #574808
+       # Disable MPROTECT so java works, bug #574808
        if is_gcj ; then
                pax-mark -m 
"${D}${PREFIX}/libexec/gcc/${CTARGET}/${GCC_CONFIG_VER}/ecj1"
                pax-mark -m 
"${D}${PREFIX}/${CTARGET}/gcc-bin/${GCC_CONFIG_VER}/gij"
@@ -1956,9 +2140,6 @@ toolchain_src_install() {
 # when installing gcc, it dumps internal libraries into /usr/lib
 # instead of the private gcc lib path
 gcc_movelibs() {
-       # older versions of gcc did not support --print-multi-os-directory
-       tc_version_is_at_least 3.2 || return 0
-
        # For non-target libs which are for CHOST and not CTARGET, we want to
        # move them to the compiler-specific CHOST internal dir.  This is stuff
        # that you want to link against when building tools rather than building
@@ -1967,9 +2148,10 @@ gcc_movelibs() {
                dodir "${HOSTLIBPATH#${EPREFIX}}"
                mv "${ED}"/usr/$(get_libdir)/libcc1* "${D}${HOSTLIBPATH}" || die
        fi
+
        # libgccjit gets installed to /usr/lib, not /usr/$(get_libdir). Probably
        # due to a bug in gcc build system.
-       if is_jit ; then
+       if [[ ${PWD} == "${WORKDIR}"/build-jit ]] && is_jit ; then
                dodir "${LIBPATH#${EPREFIX}}"
                mv "${ED}"/usr/lib/libgccjit* "${D}${LIBPATH}" || die
        fi
@@ -2024,8 +2206,8 @@ gcc_movelibs() {
        find -depth "${ED}" -type d -exec rmdir {} + >& /dev/null
 }
 
-# make sure the libtool archives have libdir set to where they actually
-# -are-, and not where they -used- to be.  also, any dependencies we have
+# Make sure the libtool archives have libdir set to where they actually
+# -are-, and not where they -used- to be. Also, any dependencies we have
 # on our own .la files need to be updated.
 fix_libtool_libdir_paths() {
        local libpath="$1"
@@ -2038,7 +2220,7 @@ fix_libtool_libdir_paths() {
        allarchives="\(${allarchives// /\\|}\)"
        popd >/dev/null
 
-       # The libdir might not have any .la files. #548782
+       # The libdir might not have any .la files. bug #548782
        find "./${dir}" -maxdepth 1 -name '*.la' \
                -exec sed -i -e "/^libdir=/s:=.*:='${dir}':" {} + || die
        # Would be nice to combine these, but -maxdepth can not be specified
@@ -2073,21 +2255,16 @@ create_gcc_env_entry() {
        # workaround for libtool being stupid and using .la's from
        # conflicting ABIs by using the first one in the search path
        local ldpaths mosdirs
-       if tc_version_is_at_least 3.2 ; then
-               local mdir mosdir abi ldpath
-               for abi in $(get_all_abis TARGET) ; do
-                       mdir=$($(XGCC) $(get_abi_CFLAGS ${abi}) 
--print-multi-directory)
-                       ldpath=${LIBPATH}
-                       [[ ${mdir} != "." ]] && ldpath+="/${mdir}"
-                       ldpaths="${ldpath}${ldpaths:+:${ldpaths}}"
-
-                       mosdir=$($(XGCC) $(get_abi_CFLAGS ${abi}) 
-print-multi-os-directory)
-                       mosdirs="${mosdir}${mosdirs:+:${mosdirs}}"
-               done
-       else
-               # Older gcc's didn't do multilib, so logic is simple.
-               ldpaths=${LIBPATH}
-       fi
+       local mdir mosdir abi ldpath
+       for abi in $(get_all_abis TARGET) ; do
+               mdir=$($(XGCC) $(get_abi_CFLAGS ${abi}) --print-multi-directory)
+               ldpath=${LIBPATH}
+               [[ ${mdir} != "." ]] && ldpath+="/${mdir}"
+               ldpaths="${ldpath}${ldpaths:+:${ldpaths}}"
+
+               mosdir=$($(XGCC) $(get_abi_CFLAGS ${abi}) 
-print-multi-os-directory)
+               mosdirs="${mosdir}${mosdirs:+:${mosdirs}}"
+       done
 
        cat <<-EOF > ${gcc_envd_file}
        GCC_PATH="${BINPATH}"
@@ -2129,12 +2306,12 @@ create_revdep_rebuild_entry() {
 }
 
 copy_minispecs_gcc_specs() {
-       # on gcc 6 we don't need minispecs
+       # On gcc 6, we don't need minispecs
        if tc_version_is_at_least 6.0 ; then
                return 0
        fi
 
-       # setup the hardenedno* specs files and the vanilla specs file.
+       # Setup the hardenedno* specs files and the vanilla specs file.
        if hardened_gcc_works ; then
                create_gcc_env_entry hardenednopiessp
        fi
@@ -2184,7 +2361,7 @@ gcc_slot_java() {
        done
 
        # Rename jar because it could clash with Kaffe's jar if this gcc is
-       # primary compiler (aka don't have the -<version> extension)
+       # primary compiler (aka doesn't have the -<version> extension)
        cd "${D}${BINPATH}"
        [[ -f jar ]] && mv -f jar gcj-jar
 }
@@ -2193,40 +2370,40 @@ gcc_slot_java() {
 
 toolchain_pkg_postinst() {
        do_gcc_config
-       if [[ ! ${ROOT%/} && -f 
${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+       if [[ ! ${ROOT} && -f 
${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
                eselect compiler-shadow update all
        fi
 
        if ! is_crosscompile && [[ ${PN} != "kgcc64" ]] ; then
                # gcc stopped installing .la files fixer in June 2020.
                # Cleaning can be removed in June 2022.
-               rm -f "${EROOT%/}"/sbin/fix_libtool_files.sh
-               rm -f "${EROOT%/}"/usr/sbin/fix_libtool_files.sh
-               rm -f "${EROOT%/}"/usr/share/gcc-data/fixlafiles.awk
+               rm -f "${EROOT}"/sbin/fix_libtool_files.sh
+               rm -f "${EROOT}"/usr/sbin/fix_libtool_files.sh
+               rm -f "${EROOT}"/usr/share/gcc-data/fixlafiles.awk
        fi
 }
 
 toolchain_pkg_postrm() {
        do_gcc_config
-       if [[ ! ${ROOT%/} && -f 
${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
+       if [[ ! ${ROOT} && -f 
${EPREFIX}/usr/share/eselect/modules/compiler-shadow.eselect ]] ; then
                eselect compiler-shadow clean all
        fi
 
-       # clean up the cruft left behind by cross-compilers
+       # Clean up the cruft left behind by cross-compilers
        if is_crosscompile ; then
-               if [[ -z $(ls "${EROOT%/}"/etc/env.d/gcc/${CTARGET}* 
2>/dev/null) ]] ; then
+               if [[ -z $(ls "${EROOT}"/etc/env.d/gcc/${CTARGET}* 2>/dev/null) 
]] ; then
                        einfo "Removing last cross-compiler instance. Deleting 
dangling symlinks."
-                       rm -f "${EROOT%/}"/etc/env.d/gcc/config-${CTARGET}
-                       rm -f "${EROOT%/}"/etc/env.d/??gcc-${CTARGET}
-                       rm -f 
"${EROOT%/}"/usr/bin/${CTARGET}-{gcc,{g,c}++}{,32,64}
+                       rm -f "${EROOT}"/etc/env.d/gcc/config-${CTARGET}
+                       rm -f "${EROOT}"/etc/env.d/??gcc-${CTARGET}
+                       rm -f 
"${EROOT}"/usr/bin/${CTARGET}-{gcc,{g,c}++}{,32,64}
                fi
                return 0
        fi
 
        # gcc stopped installing .la files fixer in June 2020.
        # Cleaning can be removed in June 2022.
-       rm -f "${EROOT%/}"/sbin/fix_libtool_files.sh
-       rm -f "${EROOT%/}"/usr/share/gcc-data/fixlafiles.awk
+       rm -f "${EROOT}"/sbin/fix_libtool_files.sh
+       rm -f "${EROOT}"/usr/share/gcc-data/fixlafiles.awk
 }
 
 do_gcc_config() {
@@ -2240,12 +2417,12 @@ do_gcc_config() {
        current_gcc_config=$(env -i ROOT="${ROOT}" 
"${EPREFIX}"/usr/bin/gcc-config -c ${CTARGET} 2>/dev/null)
        if [[ -n ${current_gcc_config} ]] ; then
                local current_specs use_specs
-               # figure out which specs-specific config is active
+               # Figure out which specs-specific config is active
                current_specs=$(gcc-config -S ${current_gcc_config} | awk 
'{print $3}')
                [[ -n ${current_specs} ]] && use_specs=-${current_specs}
 
                if [[ -n ${use_specs} ]] && \
-                  [[ ! -e 
${EROOT%/}/etc/env.d/gcc/${CTARGET}-${GCC_CONFIG_VER}${use_specs} ]]
+                  [[ ! -e 
${EROOT}/etc/env.d/gcc/${CTARGET}-${GCC_CONFIG_VER}${use_specs} ]]
                then
                        ewarn "The currently selected specs-specific gcc 
config,"
                        ewarn "${current_specs}, doesn't exist anymore. This is 
usually"
@@ -2258,7 +2435,7 @@ do_gcc_config() {
                target="${CTARGET}-${GCC_CONFIG_VER}${use_specs}"
        else
                # The curent target is invalid.  Attempt to switch to a valid 
one.
-               # Blindly pick the latest version.  #529608
+               # Blindly pick the latest version. bug #529608
                # TODO: Should update gcc-config to accept `-l ${CTARGET}` 
rather than
                # doing a partial grep like this.
                target=$(gcc-config -l 2>/dev/null | grep " ${CTARGET}-[0-9]" | 
tail -1 | awk '{print $2}')
@@ -2273,9 +2450,9 @@ should_we_gcc_config() {
        local curr_config
        curr_config=$(env -i ROOT="${ROOT}" "${EPREFIX}"/usr/bin/gcc-config -c 
${CTARGET} 2>&1) || return 0
 
-       # if the previously selected config has the same major.minor (branch) as
+       # If the previously selected config has the same major.minor (branch) as
        # the version we are installing, then it will probably be uninstalled
-       # for being in the same SLOT, make sure we run gcc-config.
+       # for being in the same SLOT, so make sure we run gcc-config.
        local curr_config_ver=$(env -i ROOT="${ROOT}" 
"${EPREFIX}"/usr/bin/gcc-config -S ${curr_config} | awk '{print $2}')
 
        local curr_branch_ver=$(ver_cut 1-2 ${curr_config_ver})
@@ -2283,12 +2460,14 @@ should_we_gcc_config() {
        if [[ ${curr_branch_ver} == ${GCC_BRANCH_VER} ]] ; then
                return 0
        else
-               # if we're installing a genuinely different compiler version,
+               # If we're installing a genuinely different compiler version,
                # we should probably tell the user -how- to switch to the new
-               # gcc version, since we're not going to do it for him/her.
+               # gcc version, since we're not going to do it for them.
+               #
                # We don't want to switch from say gcc-3.3 to gcc-3.4 right in
                # the middle of an emerge operation (like an 'emerge -e world'
                # which could install multiple gcc versions).
+               #
                # Only warn if we're installing a pkg as we might be called from
                # the pkg_{pre,post}rm steps.  #446830
                if [[ ${EBUILD_PHASE} == *"inst" ]] ; then
@@ -2364,15 +2543,16 @@ is_go() {
 
 is_jit() {
        gcc-lang-supported jit || return 1
+
        # cross-compiler does not really support jit as it has
-       # to generate code for a target. On target like avr
+       # to generate code for a target. On targets like avr,
        # libgcclit.so can't link at all: bug #594572
        is_crosscompile && return 1
+
        _tc_use_if_iuse jit
 }
 
 is_multilib() {
-       tc_version_is_at_least 3 || return 1
        _tc_use_if_iuse multilib
 }
 
@@ -2395,7 +2575,7 @@ get_make_var() {
 
 XGCC() { get_make_var GCC_FOR_TARGET ; }
 
-# The gentoo piessp patches allow for 3 configurations:
+# The gentoo pie-ssp patches allow for 3 configurations:
 # 1) PIE+SSP by default
 # 2) PIE by default
 # 3) SSP by default
@@ -2404,8 +2584,6 @@ hardened_gcc_works() {
                # $gcc_cv_ld_pie is unreliable as it simply take the output of
                # `ld --help | grep -- -pie`, that reports the option in all 
cases, also if
                # the loader doesn't actually load the resulting executables.
-               # To avoid breakage, blacklist FreeBSD here at least
-               [[ ${CTARGET} == *-freebsd* ]] && return 1
 
                want_pie || return 1
                _tc_use_if_iuse nopie && return 1
@@ -2427,17 +2605,9 @@ hardened_gcc_works() {
 hardened_gcc_is_stable() {
        local tocheck
        if [[ $1 == "pie" ]] ; then
-               if [[ ${CTARGET} == *-uclibc* ]] ; then
-                       tocheck=${PIE_UCLIBC_STABLE}
-               else
-                       tocheck=${PIE_GLIBC_STABLE}
-               fi
+               tocheck=${PIE_GLIBC_STABLE}
        elif [[ $1 == "ssp" ]] ; then
-               if [[ ${CTARGET} == *-uclibc* ]] ; then
-                       tocheck=${SSP_UCLIBC_STABLE}
-               elif  [[ ${CTARGET} == *-gnu* ]] ; then
-                       tocheck=${SSP_STABLE}
-               fi
+               tocheck=${SSP_STABLE}
        else
                die "hardened_gcc_stable needs to be called with pie or ssp"
        fi
@@ -2447,7 +2617,7 @@ hardened_gcc_is_stable() {
 }
 
 want_minispecs() {
-       # on gcc 6 we don't need minispecs
+       # On gcc 6, we don't need minispecs
        if tc_version_is_at_least 6.0 ; then
                return 0
        fi
@@ -2495,6 +2665,11 @@ toolchain_death_notice() {
        fi
 }
 
+fi
+
+EXPORT_FUNCTIONS pkg_pretend pkg_setup src_unpack src_prepare src_configure \
+       src_compile src_test src_install pkg_postinst pkg_postrm
+
 # Note [implicitly enabled flags]
 # -------------------------------
 # Usually configure-based packages handle explicit feature requests

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