After boot-strapping my system for a few weeks, and cleaning every error that pops-up, I am now getting something more useful error messages with my ffast-math problems.
/bin/ld: crtfastmath.o: No such file: No such file or directory crtfastmath pulled more results than -ffast-math on both bugzilla for gcc and google.com/linux. I ended up at the following sites (one way or another): http://www.netdomination.org/~stkn/index.php?/archives/24-Anatomy-of-a-segfault....html http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28621 http://gcc.gnu.org/ml/gcc-patches/2006-03/msg01179.html http://gcc.gnu.org/ml/gcc/2005-08/msg00281.html http://gcc.gnu.org/ml/gcc/2005-08/msg00282.html http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01073.html 1) -Os is note passed to/by uClibc thanks to hlfs's sed command that removes this. 2) in gcc/config/i386/t-crtfm, i found that -msse is passed, so targets that do not support sse will have problems with ffast-math 3) I added i386/t-crtfm to the gcc/config.gcc file where uclibc support is added by the gcc-4.1.1-uclibc patch 4) Now the -ffast-math links once again and suddenly the apps segfault again. (echo 'int main(){}' >> test.c && gcc test.c -ffast-math && ./a.out) == segfault 5) I apply the patch: gcc-crt-align-1.patch, which I will have rediffed and labeled appropriately for HLFS and supplied with this e-mail and segfault no more!! (with additional patch by Lu, Hongjiu from intel). 6) I also have my fix for making sure crtfastmath.o gets compiled and installed. It looks like glibc should be unaffected by this problem, but the uClibc patch overlooks this and a rediff has been made and supplied. I have yet to switch to the new development version of HLFS, so the uClibc_conf-2 patch may not be needed for the new HLFS dev. 7) Now all I have to do is get the -ffast-math calls back into my system and see if things that should be noticably effected improve. (most specifically, MESA!!). -- Kevin Day
gcc-4.1.1-fix_fastmath-1.patch
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gcc-4.1.1-uClibc_conf-2.patch
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