Re: [patch] darwin configure test for TARGET_LIBC_PROVIDES_SSP

[Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>]

> Bootstrapped and tested on darwin8 and darwin9 (with and without the 
> functions) and tested that it either tries to link in ssp or not.

I'd rather wrap the entire check in AC_CACHE_CHECK, like this:

AC_CACHE_CHECK(__stack_chk_fail in target C library,
  gcc_cv_libc_provides_ssp,
  [gcc_cv_libc_provides_ssp=no
  case "$target" in
  *-*-linux*)
    ...
    ;;
  *-*-darwin*)
    gcc_cv_libc_provides_ssp=no
    AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes])
    ;;
  esac])

The reason other targets don't do the same is because there is nothing 
like AC_CHECK_TARGET_FUNC: this works for Darwin only because it's 
always compiled native.

Thanks for doing this change.

Paolo