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Subject: [Bug bootstrap/41691]  New: -flto leads to bootstrap failure
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trunk r152694

CFLAGS="-march=atom -mfpmath=sse -mveclibabi=svml -pipe -O3 -flto"

When configure in libgcc, 

checking for x86_64-unknown-linux-gnu-gcc... /home/xhs/build/gcc/./gcc/xgcc
-B/home/xhs/build/gcc/./gcc/ -B/gcc-4.5/gcc/x86_64-unknown-linux-gnu/bin/
-B/gcc-4.5/gcc/x86_64-unknown-linux-gnu/lib/ -isystem
/gcc-4.5/gcc/x86_64-unknown-linux-gnu/include -isystem
/gcc-4.5/gcc/x86_64-unknown-linux-gnu/sys-include   
checking for suffix of object files... configure: error: in
`/home/xhs/build/gcc/x86_64-unknown-linux-gnu/libgcc':
configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.


-- 
           Summary: -flto leads to bootstrap failure
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: linuxl4 at sohu dot com
 GCC build triplet: x86_64-pc-linux
  GCC host triplet: x86_64-pc-linux
GCC target triplet: x86_64-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41691