[Bug target/55061] libbacktrace build fails during bootstrap on powerpc-apple-darwin9

[howarth at nitro dot med.uc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55061

--- Comment #14 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-25 14:11:38 UTC ---
Can we enhance the section in config/unwind_ipinfo.m4...

    # Darwin before version 9 does not have _Unwind_GetIPInfo.
    changequote(,)
    case ${target} in
      *-*-darwin[3-8]|*-*-darwin[3-8].*) have_unwind_getipinfo=no ;;
      *) have_unwind_getipinfo=yes ;;
    esac
    changequote([,])

with a new case instance of *-*-darwin9* that tests..

             AC_TRY_COMPILE([,[_Unwind_GetIPInfo();].
             [gcc_cv_getipinfo=yes],
             [gcc_cv_getipinfo=no])

in order to decided if  _Unwind_GetIPInfo is available?