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Target: ppc750 Toolchain 1: crosstool-0.28-rc19, gcc3.3.3 glibc-2.3.2 Toolchain 2: crosstool-0.28-rc19, gcc3.3.3 glibc-2.3.2 without gcc-3.3.2-arm-softfloat.patch Sample Testcase: modified struct-ret-1.c with printf statements (see attached) Complier flag: --static.
Both the toolchains output the same .s file for the testcase. When executed on target, toolchain 1 binary prints garbage and toolchain 2
binary prints expected output.
For toolchain 1, the testcase compares garbage values and succeeds or aborts
and for toolchain 2 the testcase
compares valid output and always succeeds.
I just wrote a shell script to try to reproduce your result. Before running it, I copied patches/gcc-3.3.3/gcc-3.3.2-arm-softfloat.patch to the contrib directory, and put a copy of your struct-ret-1.c in the current directory. Does this look right?
#!/bin/sh set -ex TARBALLS_DIR=$HOME/downloads export TARBALLS_DIR GCC_LANGUAGES="c" export GCC_LANGUAGES RESULT_TOP=/opt/crosstool/xxvfp export RESULT_TOP mkdir -p $RESULT_TOP cp contrib/gcc-3.3.2-arm-softfloat.patch patches/gcc-3.3.3 eval `cat powerpc-750.dat gcc-3.3.3-glibc-2.3.2.dat` sh all.sh --notest RESULT_TOP=/opt/crosstool/novfp export RESULT_TOP mkdir -p $RESULT_TOP rm -f patches/gcc-3.3.3/gcc-3.3.2-arm-softfloat.patch eval `cat powerpc-750.dat gcc-3.3.3-glibc-2.3.2.dat` sh all.sh --notest /opt/crosstool/xxvfp/powerpc-750-linux-gnu/gcc-3.3.3-glibc-2.3.2/bin/powerpc-750-linux-gnu-gcc -static struct-ret-1.c -o xxvfp.out /opt/crosstool/novfp/powerpc-750-linux-gnu/gcc-3.3.3-glibc-2.3.2/bin/powerpc-750-linux-gnu-gcc -static struct-ret-1.c -o novfp.out cmp xxvfp.out novfp.out echo Finished
It does say that xxvfp.out and novfp.out differ, but if you run $ cmp -l xxvfp.out novfp.out you will see that the only differences are that 'no' has been replaced with 'xx'. Thus I doubt that the two programs will behave differently. I can send them to you if you like, but perhaps you should run this shell script yourself and report back the results.
-- My technical stuff: http://kegel.com My politics: see http://www.misleader.org for examples of why I'm for regime change
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