[Bug tree-optimization/79955] New: GLIBC build fails after r245840

["doug.gilmore at imgtec dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79955

            Bug ID: 79955
           Summary: GLIBC build fails after r245840
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doug.gilmore at imgtec dot com
  Target Milestone: ---

Created attachment 40920
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40920&action=edit
CPP output file for mips-mti-linux-gnu target

See:

https://sourceware.org/ml/libc-alpha/2017-03/msg00052.html

We are working around the issue by disabling -Werror in the build.

I'll upload an X86_64 .i file tomorrow.


$ mips-mti-linux-gnu-gcc -mabi=32 fnmatch.i -c -std=gnu11 -fgnu89-inline  -O2
-Wall -Wundef -Wwrite-strings -fmerge-all-constants -fno-stack-protector
-frounding-math \
-g -Wstrict-prototypes -Wold-style-definition     -ftls-model=initial-exec
In file included from fnmatch.c:250:0:
fnmatch_loop.c: In function 'internal_fnwmatch':
../locale/weightwc.h:103:28: warning: '*((void *)&str+4)' may be used
uninitialized in this function [-Wmaybe-uninitialized]