vkd3d-proton/m4/check-mingw-prog.m4

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dnl VKD3D_CHECK_MINGW32_PROG(variable, crosstarget-variable, [value-if-not-found], [path])
AC_DEFUN([VKD3D_CHECK_MINGW32_PROG],
[
AC_SUBST([$2], [$3])dnl
ac_prefix_list="m4_foreach([ac_vkd3d_prefix], [w64-mingw32, pc-mingw32, mingw32msvc, mingw32],
m4_foreach([ac_vkd3d_cpu], [i686, i586, i486, i386], [ac_vkd3d_cpu-ac_vkd3d_prefix-gcc ]))
mingw32-gcc"
AC_CHECK_PROGS([$1], [$ac_prefix_list], [$3], [$4])
if test "x[$]$1" != x$3
then
ac_vkd3d_save_CC="$CC"
CC="[$]$1"
AC_MSG_CHECKING([whether $CC works])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])
set x [$]$1
shift
while test "[$]#" -ge 1
do
case "[$]1" in
*-gcc) $2=`expr "[$]1" : '\(.*\)-gcc'` ;;
esac
shift
done],
[AC_MSG_RESULT([no])])
CC="$ac_vkd3d_save_CC"
fi
])
dnl VKD3D_CHECK_MINGW64_PROG(variable, crosstarget-variable, [value-if-not-found], [path])
AC_DEFUN([VKD3D_CHECK_MINGW64_PROG],
[
AC_SUBST([$2], [$3])dnl
ac_prefix_list="m4_foreach([ac_vkd3d_prefix], [pc-mingw32, w64-mingw32, mingw32msvc],
m4_foreach([ac_vkd3d_cpu], [x86_64, amd64], [ac_vkd3d_cpu-ac_vkd3d_prefix-gcc ]))"
AC_CHECK_PROGS([$1], [$ac_prefix_list], [$3], [$4])
if test "x[$]$1" != x$3
then
ac_vkd3d_save_CC="$CC"
CC="[$]$1"
AC_MSG_CHECKING([whether $CC works])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])
set x [$]$1
shift
while test "[$]#" -ge 1
do
case "[$]1" in
*-gcc) $2=`expr "[$]1" : '\(.*\)-gcc'` ;;
esac
shift
done],
[AC_MSG_RESULT([no])])
CC="$ac_vkd3d_save_CC"
fi
])