http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50218
Bug #: 50218
Summary: [4.7 regression] tree-ssa-loop-ivopts.c triggers
-Werror=maybe-uninitialized breaking i686-linux
bootstrap
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mi...@it.uu.se
gcc-4.7-20110827 fails to bootstrap on i686-linux due to:
/mnt/scratch/gcc-4.7-20110827/gcc/tree-ssa-loop-ivopts.c: In function
'determine_use_iv_cost':
/mnt/scratch/gcc-4.7-20110827/gcc/tree-ssa-loop-ivopts.c:4846:19: error: 'comp'
may be used uninitialized in this function [-Werror=maybe-uninitialized]
/mnt/scratch/gcc-4.7-20110827/gcc/tree-ssa-loop-ivopts.c:4760:18: note: 'comp'
was declared here
cc1: all warnings being treated as errors
make[3]: *** [tree-ssa-loop-ivopts.o] Error 1
make[3]: Leaving directory `/mnt/scratch/objdir47/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `/mnt/scratch/objdir47'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/mnt/scratch/objdir47'
make: *** [bootstrap] Error 2
Configured as:
/mnt/scratch/gcc-4.7-20110827/configure --prefix=/mnt/scratch/install47
--with-gmp=/home/mikpe/pkgs/linux-x86/gmp-4.3.2
--with-mpfr=/home/mikpe/pkgs/linux-x86/mpfr-2.4.2
--with-mpc=/home/mikpe/pkgs/linux-x86/mpc-0.8.2 --enable-checking=release
--enable-languages=c --disable-build-poststage1-with-cxx
I have a patch.
