I'm building gcc 4.5.1 and I encounter the below error:

Comparing stages 2 and 3
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
gmp/mpn/sb_div_q.o differs
mpfr/get_d.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/tmp/IEK2/gcc-4.5.1-build'

This build is on a linux IA64 system, making use of gcc 3.4.6.

THe configure was run with the below command:
 configure --prefix=/opt/third/gcc-4.5.1   --enable-languages=c 

And then simply running make.

I had several times problems (for each stage) due to missing gmp_impl.h and
longlong.h but solved with a manual copy from the sources.

Note that I succeeded to make the same gcc 4.5.1 build installation on a AIX
5.3 but on the linux I have the above issue that is quite blocking for the

THanks upfront for keeping me informed on any possible way to investigate,
Kind regards,

           Summary: Bootstrap comparison failure
           Product: gcc
           Version: 4.5.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: iek at c-w dot be


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