| 1 | dnl $Id$
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| 2 | dnl
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| 3 | dnl
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| 4 | dnl Check for MIPS/IRIX ABI flags. Sets $abi and $abilibdirext to some
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| 5 | dnl value.
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| 6 |
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| 7 | AC_DEFUN([AC_MIPS_ABI], [
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| 8 | AC_ARG_WITH(mips_abi,
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| 9 | AS_HELP_STRING([--with-mips-abi=abi],[ABI to use for IRIX (32, n32, or 64)]))
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| 10 |
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| 11 | case "$host_os" in
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| 12 | irix*)
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| 13 | with_mips_abi="${with_mips_abi:-yes}"
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| 14 | if test -n "$GCC"; then
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| 15 |
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| 16 | # GCC < 2.8 only supports the O32 ABI. GCC >= 2.8 has a flag to select
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| 17 | # which ABI to use, but only supports (as of 2.8.1) the N32 and 64 ABIs.
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| 18 | #
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| 19 | # Default to N32, but if GCC doesn't grok -mabi=n32, we assume an old
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| 20 | # GCC and revert back to O32. The same goes if O32 is asked for - old
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| 21 | # GCCs doesn't like the -mabi option, and new GCCs can't output O32.
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| 22 | #
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| 23 | # Don't you just love *all* the different SGI ABIs?
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| 24 |
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| 25 | case "${with_mips_abi}" in
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| 26 | 32|o32) abi='-mabi=32'; abilibdirext='' ;;
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| 27 | n32|yes) abi='-mabi=n32'; abilibdirext='32' ;;
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| 28 | 64) abi='-mabi=64'; abilibdirext='64' ;;
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| 29 | no) abi=''; abilibdirext='';;
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| 30 | *) AC_MSG_ERROR("Invalid ABI specified") ;;
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| 31 | esac
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| 32 | if test -n "$abi" ; then
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| 33 | ac_foo=krb_cv_gcc_`echo $abi | tr =- __`
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| 34 | dnl
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| 35 | dnl can't use AC_CACHE_CHECK here, since it doesn't quote CACHE-ID to
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| 36 | dnl AC_MSG_RESULT
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| 37 | dnl
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| 38 | AC_MSG_CHECKING([if $CC supports the $abi option])
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| 39 | AC_CACHE_VAL($ac_foo, [
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| 40 | save_CFLAGS="$CFLAGS"
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| 41 | CFLAGS="$CFLAGS $abi"
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| 42 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[eval $ac_foo=yes], [eval $ac_foo=no])dnl
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| 43 | CFLAGS="$save_CFLAGS"
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| 44 | ])
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| 45 | ac_res=`eval echo \\\$$ac_foo`
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| 46 | AC_MSG_RESULT($ac_res)
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| 47 | if test $ac_res = no; then
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| 48 | # Try to figure out why that failed...
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| 49 | case $abi in
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| 50 | -mabi=32)
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| 51 | save_CFLAGS="$CFLAGS"
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| 52 | CFLAGS="$CFLAGS -mabi=n32"
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| 53 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],[[int x;]])],[ac_res=yes],[ac_res=no])dnl
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| 54 | CLAGS="$save_CFLAGS"
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| 55 | if test $ac_res = yes; then
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| 56 | # New GCC
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| 57 | AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
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| 58 | fi
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| 59 | # Old GCC
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| 60 | abi=''
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| 61 | abilibdirext=''
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| 62 | ;;
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| 63 | -mabi=n32|-mabi=64)
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| 64 | if test $with_mips_abi = yes; then
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| 65 | # Old GCC, default to O32
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| 66 | abi=''
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| 67 | abilibdirext=''
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| 68 | else
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| 69 | # Some broken GCC
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| 70 | AC_MSG_ERROR([$CC does not support the $with_mips_abi ABI])
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| 71 | fi
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| 72 | ;;
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| 73 | esac
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| 74 | fi #if test $ac_res = no; then
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| 75 | fi #if test -n "$abi" ; then
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| 76 | else
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| 77 | case "${with_mips_abi}" in
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| 78 | 32|o32) abi='-32'; abilibdirext='' ;;
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| 79 | n32|yes) abi='-n32'; abilibdirext='32' ;;
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| 80 | 64) abi='-64'; abilibdirext='64' ;;
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| 81 | no) abi=''; abilibdirext='';;
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| 82 | *) AC_MSG_ERROR("Invalid ABI specified") ;;
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| 83 | esac
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| 84 | fi #if test -n "$GCC"; then
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| 85 | ;;
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| 86 | esac
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| 87 | ])
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