Date: Sun, 23 Aug 2015 17:56:36 +0000 From: bugzilla-noreply@freebsd.org To: gecko@FreeBSD.org Subject: [Bug 202586] mail/thunderbird fail to build/wrong CFLAGS sse2 on i386 Message-ID: <bug-202586-21738-kXErCGpeFc@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-202586-21738@https.bugs.freebsd.org/bugzilla/> References: <bug-202586-21738@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202586 --- Comment #1 from Jan Beich <jbeich@FreeBSD.org> --- What kind of toolchain are you using? -Qunused-arguments suggests Clang of unknown version. Check it's not broken: $ cat a.c #include <emmintrin.h> int main() {} $ cc -msse2 a.c $ cc -march=athlon-xp -msse2 a.c $ cc -msse2 -dM -E -</dev/null | fgrep SSE $ cc -march=athlon-xp -msse2 -dM -E -</dev/null | fgrep SSE $ find /usr/include /usr/lib/clang -name emmintrin.h /usr/include/clang/3.4.1/emmintrin.h [or] /usr/lib/clang/3.6.1/include/emmintrin.h Gecko uses SSE2 only when CPU supports it with the check done at runtime. The *optional* bits providing optimized routines are required to be built with -msse2 flag. If SSE2 is used unconditionally somewhere Firefox would crash, not fail to build. https://dxr.mozilla.org/mozilla-central/source/intl/uconv/nsUTF8ToUnicode.cpp#170 https://dxr.mozilla.org/mozilla-central/source/mozglue/build/SSE.h#103 -- You are receiving this mail because: You are the assignee for the bug.
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