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GCC4.3.3: Bootstrap comparison failure!


Hi everyone,

I got a "Bootstrap comparison failure!" error when building gcc 4.3.3:


Comparing stages 2 and 3
warning: ./cc1-checksum.o differs
warning: ./cc1plus-checksum.o differs
Bootstrap comparison failure!
./tree-cfg.o differs
./double-int.o differs
./gimple-low.o differs
./tree-into-ssa.o differs
./tree-ssa-loop-unswitch.o differs
...omit...
./langhooks.o differs
...omit...
./tree-dfa.o differs
./tree-nomudflap.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/bwdata/testuser/repo/build-gcc-4.3.3-by-gcc-3.3.3'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/bwdata/testuser/repo/build-gcc-4.3.3-by-gcc-3.3.3'
make: *** [all] Error 2


My configuration is:
   -Linux gnode2 2.6.5-7.97-smp #1 SMP Fri Jul 2 14:21:59 UTC 2004
x86_64 x86_64 x86_64 GNU/Linux
   -SUSE LINUX Enterprise Server 9 (x86_64)
   -gcc 3.3.3
   -gmp 4.2.2, mpfr 2.3.0

the configure cmd is:
../gcc-4.3.3/configure --prefix=/home/testuser/tools/gcc-4.3.3
                               --with-gmp=/home/testuser/tools/gmp-4.2.2
                               --with-mpfr=/home/testuser/tools/mpfr-2.3.0/
                               --enable-languages=c,c++,fortran

And I found a strange problem when I tried to use the stage1-gcc/xgcc to compile
langhooks.c (langhooks.o differs at the final comparison) manually. I used the
following command to compile it twice, and compare the two produced langhooks.o.
To my surprise, the two langhooks.o were not identical:

In directory stage2-gcc, I issued the following cmd to produce langhooks1.o.
>/home/testuser/repo/build-gcc-4.3.3-by-gcc-3.3.3/stage1-gcc/xgcc -B/home/testuser/repo/build-gcc-4.3.3-by-gcc
-3.3.3/./stage1-gcc/
-B/home/testuser/tools/gcc-4.3.3/x86_64-unknown-linux-gnu/bin/ -c  -g
-O2 -DIN_GCC   -W -Wall -Wwr
ite-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wmissing-format-attribute -pedantic
-Wno-long-lo
ng -Wno-variadic-macros             -Wno-overlength-strings
-DHAVE_CONFIG_H -I. -I. -I../../gcc-4.3.3/gcc -I../../gcc-4.3.
3/gcc/. -I../../gcc-4.3.3/gcc/../include
-I../../gcc-4.3.3/gcc/../libcpp/include
-I/home/testuser/tools/gmp-4.2.2/inc
lude -I/home/testuser/tools/mpfr-2.3.0-by-gcc-3.3.3//include
-I../../gcc-4.3.3/gcc/../libdecnumber -I../../gcc-4.3.3/
gcc/../libdecnumber/bid -I../libdecnumber
../../gcc-4.3.3/gcc/langhooks.c -o langhooks1.o

then, I issued the same cmd to produce langhooks2.o
>/home/testuser/repo/build-gcc-4.3.3-by-gcc-3.3.3/stage1-gcc/xgcc -B/home/testuser/repo/build-gcc-4.3.3-by-gcc
-3.3.3/./stage1-gcc/
-B/home/testuser/tools/gcc-4.3.3/x86_64-unknown-linux-gnu/bin/ -c -g
-O2 -DIN_GCC   -W -Wall -Wwr
ite-strings -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wmissing-format-attribute -pedantic
-Wno-long-lo
ng -Wno-variadic-macros             -Wno-overlength-strings
-DHAVE_CONFIG_H -I. -I. -I../../gcc-4.3.3/gcc -I../../gcc-4.3.
3/gcc/. -I../../gcc-4.3.3/gcc/../include
-I../../gcc-4.3.3/gcc/../libcpp/include
-I/home/testuser/tools/gmp-4.2.2/inc
lude -I/home/testuser/tools/mpfr-2.3.0-by-gcc-3.3.3//include
-I../../gcc-4.3.3/gcc/../libdecnumber -I../../gcc-4.3.3/
gcc/../libdecnumber/bid -I../libdecnumber
../../gcc-4.3.3/gcc/langhooks.c -o langhooks2.o

finally, I compared langhooks1.o langhooks2.o
>cmp -i 16 langhooks1.o langhooks2.o
langhooks1.o langhooks2.o differ: byte 76626, line 514

And I have successfully built gcc 4.0.0 and gcc 4.1.2 on the same
machine, but failed to build gcc 4.2.4 with the same
"Bootstrap comparison failure!" problem.
I have also tried to use gcc 4.0.0 to build gcc 4.3.3 on the same
machine, but also failed with the same problem.

Any suggestions?

Thanks in advance.


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