Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

[Jim Bos <jim876@xs4all.nl>]

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On 11/15/2010 12:37 PM, Andi Kleen wrote:
>> Guess we need somebody who actually reported the problem, state what
>> gcc was actually used and post preprocessed source, gcc options
>> from his case.
> 
> Jim Bos,
> Can you please supply that? 
> 
> Please use 
> 
> rm drivers/char/i8k.o
> make V=1 drivers/char/i8k.o
> make drivers/char/i8k.i  
> 
> and supply the .i file and the output of the first make line
> 
> Thanks,
> -Andi
> 

Andi,

See attached, note this is the vanilla 2.6.36 i8k.c (without any patch).
And to be 100% sure, if I build this (make drivers/char/i8k.ko) it won't
work.

[ The i8k.i is rather big, even gzipped 80k, not sure if it'll bounce ]

_
Jim


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rm -f include/config/kernel.release
echo "2.6.36$(/bin/sh /usr/src/linux-2.6.36/scripts/setlocalversion /usr/src/linux-2.6.36)" > include/config/kernel.release
set -e; : '  CHK     include/linux/version.h'; mkdir -p include/linux/; 	(echo \#define LINUX_VERSION_CODE 132644; echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) < /usr/src/linux-2.6.36/Makefile > include/linux/version.h.tmp; if [ -r include/linux/version.h ] && cmp -s include/linux/version.h include/linux/version.h.tmp; then rm -f include/linux/version.h.tmp; else : '  UPD     include/linux/version.h'; mv -f include/linux/version.h.tmp include/linux/version.h; fi
set -e; : '  CHK     include/generated/utsrelease.h'; mkdir -p include/generated/; 	if [ `echo -n "2.6.36" | wc -c ` -gt 64 ]; then echo '"2.6.36" exceeds 64 characters' >&2; exit 1; fi; (echo \#define UTS_RELEASE \"2.6.36\";) < include/config/kernel.release > include/generated/utsrelease.h.tmp; if [ -r include/generated/utsrelease.h ] && cmp -s include/generated/utsrelease.h include/generated/utsrelease.h.tmp; then rm -f include/generated/utsrelease.h.tmp; else : '  UPD     include/generated/utsrelease.h'; mv -f include/generated/utsrelease.h.tmp include/generated/utsrelease.h; fi
mkdir -p .tmp_versions 
make -f scripts/Makefile.build obj=scripts/basic
rm -f .tmp_quiet_recordmcount
make -f scripts/Makefile.build obj=.
mkdir -p kernel/
mkdir -p arch/x86/kernel/
make -f scripts/Makefile.build obj=. missing-syscalls
  /bin/sh scripts/checksyscalls.sh gcc -Wp,-MD,./.missing-syscalls.d  -nostdinc -isystem /usr/lib/gcc/i486-slackware-linux/4.5.1/include -I/usr/src/linux-2.6.36/arch/x86/include -Iinclude  -include include/generated/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -Os -m32 -msoft-float -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2 -march=i686 -mtune=pentium3 -mtune=generic -Wa,-mtune=generic32 -ffreestanding -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Wframe-larger-than=1024 -fno-stack-protector -fomit-frame-pointer -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack    -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(missing_syscalls)"  -D"KBUILD_MODNAME=KBUILD_STR(missing_syscalls)" 
make -f scripts/Makefile.build obj=scripts
make -f scripts/Makefile.build obj=scripts/mod
make -f scripts/Makefile.build obj=drivers/char drivers/char/i8k.o
  gcc -Wp,-MD,drivers/char/.i8k.o.d  -nostdinc -isystem /usr/lib/gcc/i486-slackware-linux/4.5.1/include -I/usr/src/linux-2.6.36/arch/x86/include -Iinclude  -include include/generated/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -Os -m32 -msoft-float -mregparm=3 -freg-struct-return -mpreferred-stack-boundary=2 -march=i686 -mtune=pentium3 -mtune=generic -Wa,-mtune=generic32 -ffreestanding -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -Wframe-larger-than=1024 -fno-stack-protector -fomit-frame-pointer -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack  -DMODULE  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(i8k)"  -D"KBUILD_MODNAME=KBUILD_STR(i8k)"  -c -o drivers/char/i8k.o drivers/char/i8k.c

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