Any application that uses libgcrypt 1.4.0 (including the parts of "make check"
in libgcrypt) segfaults if libgcrypt was built with gcc 4.3 (svn 131213) and
the CFLAGS setting includes "-O1 [or higher] -mtune=i686 -fomit-frame-pointer"
gdb shows the crash occurs in detect_ia32_gnuc() (defined in src/hwfeatures.c).
Adding a fprintf(stderr, "anything\n"); line anywhere in that function
(regardless where; done as part of locating the issue) makes the segfault go
away.
The segfault also doesn't occur if you just copy the code for
detect_ia32_gnuc() to a separate file and add a main() function calling it.
--
Summary: [4.3 regression] gcc 4.3-rev 131213 miscompiles
libgcrypt 1.4.0 at -O2 -mtune=i686 -fomit-frame-pointer
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bero at arklinux dot org
GCC build triplet: i586-pc-linux-gnu
GCC host triplet: i586-pc-linux-gnu
GCC target triplet: i586-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34725
