commit:     4b6a6ed19f30f4f30af53b2426c57194626715e7
Author:     Michał Górny <mgorny <AT> gentoo <DOT> org>
AuthorDate: Fri Apr  5 05:02:42 2019 +0000
Commit:     Michał Górny <mgorny <AT> gentoo <DOT> org>
CommitDate: Fri Apr  5 05:13:19 2019 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=4b6a6ed1

sys-devel/llvm: Backport dangling symlink failure fix

Closes: https://bugs.gentoo.org/674662
Signed-off-by: Michał Górny <mgorny <AT> gentoo.org>

 ...Add-additional-headers-only-if-they-exist.patch |  41 +++
 sys-devel/llvm/llvm-8.0.0-r1.ebuild                | 301 +++++++++++++++++++++
 2 files changed, 342 insertions(+)

diff --git 
a/sys-devel/llvm/files/8.0.0/0001-llvm-cmake-Add-additional-headers-only-if-they-exist.patch
 
b/sys-devel/llvm/files/8.0.0/0001-llvm-cmake-Add-additional-headers-only-if-they-exist.patch
new file mode 100644
index 00000000000..ed83244de53
--- /dev/null
+++ 
b/sys-devel/llvm/files/8.0.0/0001-llvm-cmake-Add-additional-headers-only-if-they-exist.patch
@@ -0,0 +1,41 @@
+From 1f68002cb725c6a8fb5ca8425c1c86495a053f4f Mon Sep 17 00:00:00 2001
+From: Michal Gorny <mgo...@gentoo.org>
+Date: Thu, 4 Apr 2019 14:21:38 +0000
+Subject: [PATCH] [llvm] [cmake] Add additional headers only if they exist
+
+Modify the add_header_files_for_glob() function to only add files
+that do exist, rather than all matches of the glob.  This fixes CMake
+error when one of the include directories (which happen to include
+/usr/include) contain broken symlinks.
+
+Differential Revision: https://reviews.llvm.org/D59632
+
+llvm-svn: 357701
+---
+ llvm/cmake/modules/LLVMProcessSources.cmake | 10 +++++++++-
+ 1 file changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/cmake/modules/LLVMProcessSources.cmake 
b/cmake/modules/LLVMProcessSources.cmake
+index 7cbd2863500..d0be0e8b3ba 100644
+--- a/cmake/modules/LLVMProcessSources.cmake
++++ b/cmake/modules/LLVMProcessSources.cmake
+@@ -30,7 +30,15 @@ endmacro(add_td_sources)
+ 
+ function(add_header_files_for_glob hdrs_out glob)
+   file(GLOB hds ${glob})
+-  set(${hdrs_out} ${hds} PARENT_SCOPE)
++  set(filtered)
++  foreach(file ${hds})
++    # Explicit existence check is necessary to filter dangling symlinks
++    # out.  See https://bugs.gentoo.org/674662.
++    if(EXISTS ${file})
++      list(APPEND filtered ${file})
++    endif()
++  endforeach()
++  set(${hdrs_out} ${filtered} PARENT_SCOPE)
+ endfunction(add_header_files_for_glob)
+ 
+ function(find_all_header_files hdrs_out additional_headerdirs)
+-- 
+2.21.0
+

diff --git a/sys-devel/llvm/llvm-8.0.0-r1.ebuild 
b/sys-devel/llvm/llvm-8.0.0-r1.ebuild
new file mode 100644
index 00000000000..212c6de1227
--- /dev/null
+++ b/sys-devel/llvm/llvm-8.0.0-r1.ebuild
@@ -0,0 +1,301 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+# (needed due to CMAKE_BUILD_TYPE != Gentoo)
+CMAKE_MIN_VERSION=3.7.0-r1
+PYTHON_COMPAT=( python2_7 )
+
+inherit cmake-utils eapi7-ver flag-o-matic multilib-minimal \
+       multiprocessing pax-utils python-any-r1 toolchain-funcs
+
+DESCRIPTION="Low Level Virtual Machine"
+HOMEPAGE="https://llvm.org/";
+SRC_URI="https://releases.llvm.org/${PV/_//}/${P/_/}.src.tar.xz
+       !doc? ( https://dev.gentoo.org/~mgorny/dist/llvm/${P}-manpages.tar.bz2 
)"
+
+# Keep in sync with CMakeLists.txt
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430
+       NVPTX PowerPC Sparc SystemZ WebAssembly X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+
+# Additional licenses:
+# 1. OpenBSD regex: Henry Spencer's license ('rc' in Gentoo) + BSD.
+# 2. ARM backend: LLVM Software Grant by ARM.
+# 3. MD5 code: public-domain.
+# 4. Tests (not installed):
+#  a. gtest: BSD.
+#  b. YAML tests: MIT.
+
+LICENSE="UoI-NCSA rc BSD public-domain
+       llvm_targets_ARM? ( LLVM-Grant )"
+SLOT="$(ver_cut 1)"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86 ~amd64-fbsd ~amd64-linux ~ppc-macos 
~x64-macos ~x86-macos"
+IUSE="debug doc exegesis gold libedit +libffi ncurses test xar xml
+       kernel_Darwin ${ALL_LLVM_TARGETS[*]}"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+       sys-libs/zlib:0=
+       exegesis? ( dev-libs/libpfm:= )
+       gold? (
+               || (
+                       >=sys-devel/binutils-2.31.1-r4:*[plugins]
+                       <sys-devel/binutils-2.31.1-r4:*[cxx]
+               )
+       )
+       libedit? ( dev-libs/libedit:0=[${MULTILIB_USEDEP}] )
+       libffi? ( >=virtual/libffi-3.0.13-r1:0=[${MULTILIB_USEDEP}] )
+       ncurses? ( >=sys-libs/ncurses-5.9-r3:0=[${MULTILIB_USEDEP}] )
+       xar? ( app-arch/xar )
+       xml? ( dev-libs/libxml2:2=[${MULTILIB_USEDEP}] )"
+# configparser-3.2 breaks the build (3.3 or none at all are fine)
+DEPEND="${RDEPEND}
+       dev-lang/perl
+       || ( >=sys-devel/gcc-3.0 >=sys-devel/llvm-3.5
+               ( >=sys-freebsd/freebsd-lib-9.1-r10 sys-libs/libcxx )
+       )
+       kernel_Darwin? (
+               <sys-libs/libcxx-$(ver_cut 1-3).9999
+               >=sys-devel/binutils-apple-5.1
+       )
+       doc? ( $(python_gen_any_dep '
+               dev-python/recommonmark[${PYTHON_USEDEP}]
+               dev-python/sphinx[${PYTHON_USEDEP}]
+       ') )
+       !doc? ( ${PYTHON_DEPS} )
+       gold? ( sys-libs/binutils-libs )
+       libffi? ( virtual/pkgconfig )
+       !!<dev-python/configparser-3.3.0.2
+       ${PYTHON_DEPS}"
+# There are no file collisions between these versions but having :0
+# installed means llvm-config there will take precedence.
+RDEPEND="${RDEPEND}
+       !sys-devel/llvm:0"
+PDEPEND="sys-devel/llvm-common
+       gold? ( >=sys-devel/llvmgold-${SLOT} )"
+
+REQUIRED_USE="${PYTHON_REQUIRED_USE}
+       || ( ${ALL_LLVM_TARGETS[*]} )"
+
+S=${WORKDIR}/${P/_/}.src
+
+# least intrusive of all
+CMAKE_BUILD_TYPE=RelWithDebInfo
+
+python_check_deps() {
+       use doc || return 0
+
+       has_version "dev-python/recommonmark[${PYTHON_USEDEP}]" &&
+       has_version "dev-python/sphinx[${PYTHON_USEDEP}]"
+}
+
+src_prepare() {
+       # Fix failures when /usr/include contains dangling symlinks
+       # https://bugs.gentoo.org/674662
+       eapply 
"${FILESDIR}"/8.0.0/0001-llvm-cmake-Add-additional-headers-only-if-they-exist.patch
+
+       # Fix llvm-config for shared linking and sane flags
+       # https://bugs.gentoo.org/show_bug.cgi?id=565358
+       eapply 
"${FILESDIR}"/9999/0007-llvm-config-Clean-up-exported-values-update-for-shar.patch
+
+       # disable use of SDK on OSX, bug #568758
+       sed -i -e 's/xcrun/false/' utils/lit/lit/util.py || die
+
+       # User patches + QA
+       cmake-utils_src_prepare
+}
+
+# Is LLVM being linked against libc++?
+is_libcxx_linked() {
+       local code='#include <ciso646>
+#if defined(_LIBCPP_VERSION)
+       HAVE_LIBCXX
+#endif
+'
+       local out=$($(tc-getCXX) ${CXXFLAGS} ${CPPFLAGS} -x c++ -E -P - 
<<<"${code}") || return 1
+
+       [[ ${out} == *HAVE_LIBCXX* ]]
+}
+
+multilib_src_configure() {
+       local ffi_cflags ffi_ldflags
+       if use libffi; then
+               ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
+               ffi_ldflags=$($(tc-getPKG_CONFIG) --libs-only-L libffi)
+       fi
+
+       local libdir=$(get_libdir)
+       local mycmakeargs=(
+               # disable appending VCS revision to the version to improve
+               # direct cache hit ratio
+               -DLLVM_APPEND_VC_REV=OFF
+               -DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/llvm/${SLOT}"
+               -DLLVM_LIBDIR_SUFFIX=${libdir#lib}
+
+               -DBUILD_SHARED_LIBS=ON
+               -DLLVM_TARGETS_TO_BUILD="${LLVM_TARGETS// /;}"
+               -DLLVM_BUILD_TESTS=$(usex test)
+
+               -DLLVM_ENABLE_FFI=$(usex libffi)
+               -DLLVM_ENABLE_LIBEDIT=$(usex libedit)
+               -DLLVM_ENABLE_TERMINFO=$(usex ncurses)
+               -DLLVM_ENABLE_LIBXML2=$(usex xml)
+               -DLLVM_ENABLE_ASSERTIONS=$(usex debug)
+               -DLLVM_ENABLE_LIBPFM=$(usex exegesis)
+               -DLLVM_ENABLE_EH=ON
+               -DLLVM_ENABLE_RTTI=ON
+
+               -DWITH_POLLY=OFF # TODO
+
+               -DLLVM_HOST_TRIPLE="${CHOST}"
+
+               -DFFI_INCLUDE_DIR="${ffi_cflags#-I}"
+               -DFFI_LIBRARY_DIR="${ffi_ldflags#-L}"
+               # used only for llvm-objdump tool
+               -DHAVE_LIBXAR=$(multilib_native_usex xar 1 0)
+
+               # disable OCaml bindings (now in dev-ml/llvm-ocaml)
+               -DOCAMLFIND=NO
+       )
+
+       if is_libcxx_linked; then
+               # Smart hack: alter version suffix -> SOVERSION when linking
+               # against libc++. This way we won't end up mixing LLVM libc++
+               # libraries with libstdc++ clang, and the other way around.
+               mycmakeargs+=(
+                       -DLLVM_VERSION_SUFFIX="libcxx"
+               )
+       fi
+
+#      Note: go bindings have no CMake rules at the moment
+#      but let's kill the check in case they are introduced
+#      if ! multilib_is_native_abi || ! use go; then
+               mycmakeargs+=(
+                       -DGO_EXECUTABLE=GO_EXECUTABLE-NOTFOUND
+               )
+#      fi
+
+       use test && mycmakeargs+=(
+               -DLLVM_LIT_ARGS="-vv;-j;${LIT_JOBS:-$(makeopts_jobs 
"${MAKEOPTS}" "$(get_nproc)")}"
+       )
+
+       if multilib_is_native_abi; then
+               mycmakeargs+=(
+                       -DLLVM_BUILD_DOCS=$(usex doc)
+                       -DLLVM_ENABLE_OCAMLDOC=OFF
+                       -DLLVM_ENABLE_SPHINX=$(usex doc)
+                       -DLLVM_ENABLE_DOXYGEN=OFF
+                       -DLLVM_INSTALL_UTILS=ON
+               )
+               use doc && mycmakeargs+=(
+                       
-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+                       
-DLLVM_INSTALL_SPHINX_HTML_DIR="${EPREFIX}/usr/share/doc/${PF}/html"
+                       -DSPHINX_WARNINGS_AS_ERRORS=OFF
+               )
+               use gold && mycmakeargs+=(
+                       -DLLVM_BINUTILS_INCDIR="${EPREFIX}"/usr/include
+               )
+       fi
+
+       if tc-is-cross-compiler; then
+               local tblgen="${EPREFIX}/usr/lib/llvm/${SLOT}/bin/llvm-tblgen"
+               [[ -x "${tblgen}" ]] \
+                       || die "${tblgen} not found or usable"
+               mycmakeargs+=(
+                       -DCMAKE_CROSSCOMPILING=ON
+                       -DLLVM_TABLEGEN="${tblgen}"
+               )
+       fi
+
+       # workaround BMI bug in gcc-7 (fixed in 7.4)
+       # https://bugs.gentoo.org/649880
+       # apply only to x86, https://bugs.gentoo.org/650506
+       if tc-is-gcc && [[ ${MULTILIB_ABI_FLAG} == abi_x86* ]] &&
+                       [[ $(gcc-major-version) -eq 7 && $(gcc-minor-version) 
-lt 4 ]]
+       then
+               local CFLAGS="${CFLAGS} -mno-bmi"
+               local CXXFLAGS="${CXXFLAGS} -mno-bmi"
+       fi
+
+       # LLVM_ENABLE_ASSERTIONS=NO does not guarantee this for us, #614844
+       use debug || local -x CPPFLAGS="${CPPFLAGS} -DNDEBUG"
+       cmake-utils_src_configure
+}
+
+multilib_src_compile() {
+       cmake-utils_src_compile
+
+       pax-mark m "${BUILD_DIR}"/bin/llvm-rtdyld
+       pax-mark m "${BUILD_DIR}"/bin/lli
+       pax-mark m "${BUILD_DIR}"/bin/lli-child-target
+
+       if use test; then
+               pax-mark m 
"${BUILD_DIR}"/unittests/ExecutionEngine/Orc/OrcJITTests
+               pax-mark m 
"${BUILD_DIR}"/unittests/ExecutionEngine/MCJIT/MCJITTests
+               pax-mark m "${BUILD_DIR}"/unittests/Support/SupportTests
+       fi
+}
+
+multilib_src_test() {
+       # respect TMPDIR!
+       local -x LIT_PRESERVES_TMP=1
+       cmake-utils_src_make check
+}
+
+src_install() {
+       local MULTILIB_CHOST_TOOLS=(
+               /usr/lib/llvm/${SLOT}/bin/llvm-config
+       )
+
+       local MULTILIB_WRAPPED_HEADERS=(
+               /usr/include/llvm/Config/llvm-config.h
+       )
+
+       local LLVM_LDPATHS=()
+       multilib-minimal_src_install
+
+       # move wrapped headers back
+       mv "${ED%/}"/usr/include "${ED%/}"/usr/lib/llvm/${SLOT}/include || die
+}
+
+multilib_src_install() {
+       cmake-utils_src_install
+
+       # move headers to /usr/include for wrapping
+       rm -rf "${ED%/}"/usr/include || die
+       mv "${ED%/}"/usr/lib/llvm/${SLOT}/include "${ED%/}"/usr/include || die
+
+       LLVM_LDPATHS+=( "${EPREFIX}/usr/lib/llvm/${SLOT}/$(get_libdir)" )
+}
+
+multilib_src_install_all() {
+       local revord=$(( 9999 - ${SLOT} ))
+       newenvd - "10llvm-${revord}" <<-_EOF_
+               PATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+               # we need to duplicate it in ROOTPATH for Portage to respect...
+               ROOTPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/bin"
+               MANPATH="${EPREFIX}/usr/lib/llvm/${SLOT}/share/man"
+               LDPATH="$( IFS=:; echo "${LLVM_LDPATHS[*]}" )"
+       _EOF_
+
+       # install pre-generated manpages
+       if ! use doc; then
+               # (doman does not support custom paths)
+               insinto "/usr/lib/llvm/${SLOT}/share/man/man1"
+               doins "${WORKDIR}/${P}-manpages/llvm"/*.1
+       fi
+
+       docompress "/usr/lib/llvm/${SLOT}/share/man"
+}
+
+pkg_postinst() {
+       elog "You can find additional opt-viewer utility scripts in:"
+       elog "  ${EROOT%/}/usr/lib/llvm/${SLOT}/share/opt-viewer"
+       elog "To use these scripts, you will need Python 2.7 along with the 
following"
+       elog "packages:"
+       elog "  dev-python/pygments (for opt-viewer)"
+       elog "  dev-python/pyyaml (for all of them)"
+}

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