commit: 5277d012d4d21640d82ba9c82748d8b63523804c Author: Sergei Trofimovich <slyfox <AT> gentoo <DOT> org> AuthorDate: Sat Oct 26 16:33:17 2019 +0000 Commit: Sergei Trofimovich <slyfox <AT> gentoo <DOT> org> CommitDate: Sat Oct 26 16:36:09 2019 +0000 URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5277d012
toolchain.eclass: filter out -mstackrealign, bug #688580 -mstackrealign breaks stack unwinding via _Unwind_RaiseException in libgcc_s.so.1. Not clear why exactly. Probably by breaking unwinding information during realignment. The change works it around by dropping -mstackrealign when building gcc. Reported-by: Erik Bug: https://bugs.gentoo.org/688580 Signed-off-by: Sergei Trofimovich <slyfox <AT> gentoo.org> eclass/toolchain.eclass | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass index b1ba774ea0c..7e88900737a 100644 --- a/eclass/toolchain.eclass +++ b/eclass/toolchain.eclass @@ -1547,6 +1547,13 @@ gcc_do_filter_flags() { filter-flags -Wstack-protector fi + if tc_version_is_between 6 8 ; then + # -mstackrealign triggers crashes in exception throwing + # at least on ada: bug #688580 + # The reason is unknown. Drop the flag for now. + filter-flags -mstackrealign + fi + if tc_version_is_at_least 3.4 ; then case $(tc-arch) in amd64|x86)
