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Re: m68k bootstrapping broken

Richard Zidlicky wrote:

stage2/xgcc -Bstage2/ -B/home/bernie/src/m68k-netbsdelf-HEAD-install/m68k-unknown-netbsdelf1.6.2./bin/ -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wold-style-definition -fno-common -DHAVE_CONFIG_H -I. -I. -I../../combined-HEAD/gcc -I../../combined-HEAD/gcc/. -I../../combined-HEAD/gcc/../include ../../combined-HEAD/gcc/bb-reorder.c -o bb-reorder.o
../../combined-HEAD/gcc/bb-reorder.c: In function `reorder_basic_blocks':
../../combined-HEAD/gcc/bb-reorder.c:186: warning: 'count_threshold' might be used uninitialized in this function

Could you please try running this exact command line on your system to make absolutely sure it's only happening on m68k-netbsdelf?

the line has several m68k-netbsd strings in it. Here is what I see:

stage2/xgcc -Bstage2/ -B/usr/m68k-rz-linux/bin/ -c   -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wold-style-definition -Werror    -DHAVE_CONFIG_H    -I. -I. -I../../gcc-3.4-20040107/gcc -I../../gcc-3.4-20040107/gcc/. -I../../gcc-3.4-20040107/gcc/../include  ../../gcc-3.4-20040107/gcc/bb-reorder.c -o bb-reorder.o
## no warnings

!!! That's incredible. Richard, Andreas: how is it possible that such a C frontend warning depends on the host OS?

I double checked and there are no differences between my copy of
bb-reorder.c and cvs HEAD.

Anyway - is it at all reasonable to have -Werror quit on "might be used
uninitialized" warnings? It is really very dependent on gcc version and
possibly other circumstances so it makes -Werror probably less usefull
than it could be.

This is indeed correct. -Werror is only enabled in stage2+, so it shouldn't be affected by your system compiler.

 // Bernardo Innocenti - Develer S.r.l., R&D dept.

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