88 lines
2.3 KiB
Plaintext
88 lines
2.3 KiB
Plaintext
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dnl $Id: mips-abi.m4,v 1.4 1998/05/16 20:44:15 joda Exp $
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dnl
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dnl
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dnl Check for MIPS/IRIX ABI flags. Sets $abi and $abilibdirext to some
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dnl value.
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AC_DEFUN(AC_MIPS_ABI, [
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AC_ARG_WITH(mips_abi,
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[ --with-mips-abi=abi ABI to use for IRIX (32, n32, or 64)])
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case "$host_os" in
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irix*)
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with_mips_abi="${with_mips_abi:-yes}"
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if test -n "$GCC"; then
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# GCC < 2.8 only supports the O32 ABI. GCC >= 2.8 has a flag to select
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# which ABI to use, but only supports (as of 2.8.1) the N32 and 64 ABIs.
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#
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# Default to N32, but if GCC doesn't grok -mabi=n32, we assume an old
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# GCC and revert back to O32. The same goes if O32 is asked for - old
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# GCCs doesn't like the -mabi option, and new GCCs can't output O32.
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#
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# Don't you just love *all* the different SGI ABIs?
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case "${with_mips_abi}" in
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32|o32) abi='-mabi=32'; abilibdirext='' ;;
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n32|yes) abi='-mabi=n32'; abilibdirext='32' ;;
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64) abi='-mabi=64'; abilibdirext='64' ;;
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no) abi=''; abilibdirext='';;
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*) AC_ERROR("Invalid ABI specified") ;;
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esac
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if test -n "$abi" ; then
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ac_foo=krb_cv_gcc_`echo $abi | tr =- __`
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dnl
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dnl can't use AC_CACHE_CHECK here, since it doesn't quote CACHE-ID to
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dnl AC_MSG_RESULT
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dnl
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AC_MSG_CHECKING([if $CC supports the $abi option])
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AC_CACHE_VAL($ac_foo, [
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $abi"
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AC_TRY_COMPILE(,int x;, eval $ac_foo=yes, eval $ac_foo=no)
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CFLAGS="$save_CFLAGS"
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])
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ac_res=`eval echo \\\$$ac_foo`
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AC_MSG_RESULT($ac_res)
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if test $ac_res = no; then
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# Try to figure out why that failed...
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case $abi in
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-mabi=32)
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -mabi=n32"
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AC_TRY_COMPILE(,int x;, ac_res=yes, ac_res=no)
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CLAGS="$save_CFLAGS"
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if test $ac_res = yes; then
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# New GCC
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AC_ERROR([$CC does not support the $with_mips_abi ABI])
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fi
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# Old GCC
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abi=''
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abilibdirext=''
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;;
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-mabi=n32|-mabi=64)
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if test $with_mips_abi = yes; then
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# Old GCC, default to O32
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abi=''
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abilibdirext=''
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else
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# Some broken GCC
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AC_ERROR([$CC does not support the $with_mips_abi ABI])
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fi
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;;
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esac
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fi #if test $ac_res = no; then
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fi #if test -n "$abi" ; then
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else
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case "${with_mips_abi}" in
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32|o32) abi='-32'; abilibdirext='' ;;
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n32|yes) abi='-n32'; abilibdirext='32' ;;
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64) abi='-64'; abilibdirext='64' ;;
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no) abi=''; abilibdirext='';;
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*) AC_ERROR("Invalid ABI specified") ;;
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esac
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fi #if test -n "$GCC"; then
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;;
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esac
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])
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