http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59951
Bug ID: 59951 Summary: bootstrap comparison failure with -O3 for a week Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com With revision 207121, dated today 20140126, I tried a bootstrap build with BOOT_CFLAGS="-g -O3". It went wrong in the following way Comparing stages 2 and 3 warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs Bootstrap comparison failure! gcc/bitmap.o differs gcc/fortran/decl.o differs gcc/bt-load.o differs libiberty/pic/md5.o differs libiberty/md5.o differs make[2]: *** [compare] Error 1 make[2]: Leaving directory `/home/dcb/gcc/working' make[1]: *** [stage3-bubble] Error 2 make[1]: Leaving directory `/home/dcb/gcc/working' make: *** [bootstrap] Error 2 real 75m53.471s user 142m19.580s sys 6m42.084s Sun 26 Jan 21:02:51 GMT 2014 configure line is ../src/trunk/configure --prefix=/home/dcb/gcc/results --enable-checking=yes --enable-languages=c,c++,fortran --disable-werror Machine type is x86_64. This also went wrong last Wednesday, 20140122 and last Sunday 20140119