Re: [reiserfs-list] Re: ReiserFS Oops (2.4.1, deterministic, symlink

From: Jakub Jelinek (
Date: Fri Feb 02 2001 - 19:17:01 EST

On Sat, Feb 03, 2001 at 12:40:03AM +0100, J . A . Magallon wrote:
> Please, do not do so. That depends on the PACKAGE name and version, and there
> is no standard way of versioning a patched gcc.
> The -54 is a RH'ism, for example Mandrake Cooker includes patches from
> different sources, and gcc is versioned like

You can do:
if [ "$CC" = gcc ]; then
  echo 'inline void f(unsigned int n){int i,j=-1;for(i=0;i<10&&j<0;i++)if((1UL<<i)==n)j=i;if(j<0)exit(0);}main(){f(64);exit(1);}' > test.c
  gcc -O2 -o test test.c
  if ./test; then echo "*** Please don't use this compiler to compile kernel"; fi
  rm -f test.c test

(the $CC = gcc test is there e.g. so that the test is not done when
cross-compiling or when there is a separate kernel compiler and userland
compiler (e.g. on sparc64). This test will barf on gcc-2.96 up to -67 and
on 2.97 until end of November or so).
Similarly a testcase for the reload bug which caused in 2.95.2
miscompilation of some long long stuff in the kernel could be added as well
if you want to go that way.

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