commit: deda94ea9dfc8e43ece0a6bd7190ba67147ec08e Author: Michał Górny <mgorny <AT> gentoo <DOT> org> AuthorDate: Sat Mar 10 20:48:02 2018 +0000 Commit: Michał Górny <mgorny <AT> gentoo <DOT> org> CommitDate: Sat Mar 10 20:48:34 2018 +0000 URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=deda94ea
sys-devel/llvm: Apply -mno-bmi to work-around gcc-7 bug Thanks to Alexander Bezrukov for finding the upstream bug and suggesting a proper workaround. Closes: https://bugs.gentoo.org/649880 sys-devel/llvm/llvm-6.0.0.ebuild | 16 +++++++--------- sys-devel/llvm/llvm-6.0.9999.ebuild | 7 +++++++ sys-devel/llvm/llvm-9999.ebuild | 7 +++++++ 3 files changed, 21 insertions(+), 9 deletions(-) diff --git a/sys-devel/llvm/llvm-6.0.0.ebuild b/sys-devel/llvm/llvm-6.0.0.ebuild index f38524606bb..cf9585069ad 100644 --- a/sys-devel/llvm/llvm-6.0.0.ebuild +++ b/sys-devel/llvm/llvm-6.0.0.ebuild @@ -75,15 +75,6 @@ S=${WORKDIR}/${P/_/}.src # least intrusive of all CMAKE_BUILD_TYPE=RelWithDebInfo -pkg_pretend() { - if tc-is-gcc && [[ $(gcc-major-version) -ge 7 ]]; then - eerror "GCC 7 is known to cause mis-compilation that causes the build to hang." - eerror "Please use an older version to build LLVM until a good solution is found." - eerror "Bug report: https://bugs.gentoo.org/649880"; - die "GCC-7+ is not supported" - fi -} - src_prepare() { # Fix llvm-config for shared linking and sane flags # https://bugs.gentoo.org/show_bug.cgi?id=565358 @@ -179,6 +170,13 @@ multilib_src_configure() { ) fi + # workaround BMI bug in gcc-7 (fixed in 7.4) + # https://bugs.gentoo.org/649880 + if tc-is-gcc && [[ $(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 diff --git a/sys-devel/llvm/llvm-6.0.9999.ebuild b/sys-devel/llvm/llvm-6.0.9999.ebuild index 38353f69eef..631422bd1ad 100644 --- a/sys-devel/llvm/llvm-6.0.9999.ebuild +++ b/sys-devel/llvm/llvm-6.0.9999.ebuild @@ -170,6 +170,13 @@ multilib_src_configure() { ) fi + # workaround BMI bug in gcc-7 (fixed in 7.4) + # https://bugs.gentoo.org/649880 + if tc-is-gcc && [[ $(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 diff --git a/sys-devel/llvm/llvm-9999.ebuild b/sys-devel/llvm/llvm-9999.ebuild index 603571a0bd6..1c439e6fd6a 100644 --- a/sys-devel/llvm/llvm-9999.ebuild +++ b/sys-devel/llvm/llvm-9999.ebuild @@ -172,6 +172,13 @@ multilib_src_configure() { ) fi + # workaround BMI bug in gcc-7 (fixed in 7.4) + # https://bugs.gentoo.org/649880 + if tc-is-gcc && [[ $(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
