GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69471 Fix: https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=269164 https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=8c0f695d83d1b4b92b9e7e8dad003701dbc04d27 """ driver: Also prune joined switches with negation When -march=native is passed to host_detect_local_cpu to the backend, it overrides all command lines after it. That means $ gcc -march=native -march=skylake-avx512 is the treated as $ gcc -march=skylake-avx512 -march=native Prune joined switches with Negative and RejectNegative to allow -march=skylake-avx512 to override previous -march=native on command-line. gcc/ PR driver/69471 * opts-common.c (prune_options): Also prune joined switches with Negative and RejectNegative. * config/i386/i386.opt (march=): Add Negative(march=). (mtune=): Add Negative(mtune=). * doc/options.texi: Document Negative used together with Joined and RejectNegative. gcc/testsuite/ PR driver/69471 * gcc.dg/pr69471-1.c: New test. * gcc.dg/pr69471-2.c: Likewise. * gcc.target/i386/pr69471-3.c: Likewise. """
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/gcc-patches.git/commit/?id=28e55a54934fa758aa6af045b61bd8f268a9c11b commit 28e55a54934fa758aa6af045b61bd8f268a9c11b Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2019-03-08 07:50:57 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2019-03-08 07:50:57 +0000 8.3.0: allow -march=native override with -march=<arch> That fixes build breakage like https://bugs.gentoo.org/672946 where Qt build system uses -march=core-avx2 instead of individual -mavx2 (and friends). Bug: https://bugs.gentoo.org/679738 Bug: https://gcc.gnu.org/PR69471 Bug: https://bugs.gentoo.org/672946 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> 8.3.0/gentoo/26_all_overridable_native.patch | 126 +++++++++++++++++++++++++++ 8.3.0/gentoo/README.history | 3 + 2 files changed, 129 insertions(+)
I'll cut a patchset in a few weeks if nothing newer pops up meanwhile.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/gcc-patches.git/commit/?id=c8e228e9ad5ff6e81cf0fb3a6c0f7fb2929519bf commit c8e228e9ad5ff6e81cf0fb3a6c0f7fb2929519bf Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2019-04-06 10:44:29 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2019-04-06 10:44:29 +0000 8.3.0: cut 1.1 patchset Three new patches: - 26_all_overridable_native.patch - 27_all_flto-make-all.patch - 28_all_i386_retpoline-and-jumptable.patch Bug: https://bugs.gentoo.org/679738 Bug: https://bugs.gentoo.org/682018 Bug: https://bugs.gentoo.org/682218 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> 8.3.0/gentoo/README.history | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ce95a47723f26ab8a687c3dffeea80aea71bfd87 commit ce95a47723f26ab8a687c3dffeea80aea71bfd87 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2019-04-06 12:49:11 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2019-04-06 12:49:50 +0000 sys-devel/gcc: cut 1.1 patchset for 8.3.0 Three new patches: - 26_all_overridable_native.patch - 27_all_flto-make-all.patch - 28_all_i386_retpoline-and-jumptable.patch This is also the first EAPI=6 gcc ebuild. Closes: https://bugs.gentoo.org/679738 Closes: https://bugs.gentoo.org/682018 Closes: https://bugs.gentoo.org/682218 Package-Manager: Portage-2.3.62, Repoman-2.3.12 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> sys-devel/gcc/Manifest | 1 + sys-devel/gcc/gcc-8.3.0-r1.ebuild | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+)
