diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 0000000..c14986f --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,47 @@ +dnl CHECK_ENUM and GET_DEFINE autoconf macros are +dnl Copyright 2004,2006 Bernhard R. Link +dnl and hereby in the public domain +# Check for an enum, which seem to be forgotten in autoconf, +# as this can neighter be checked with cpp, nor is it a symbol +m4_define([CHECK_ENUM], +[AS_VAR_PUSHDEF([check_Enum], [rr_cv_check_enum_$1])dnl +AC_CACHE_CHECK([for $1 in $2], check_Enum, +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT([$5]) +@%:@include <$2>], +[ if( $1 == 0 ) + return 0; +])], + [AS_VAR_SET(check_Enum, yes)], + [AS_VAR_SET(check_Enum, no)])]) +AS_IF([test AS_VAR_GET(check_Enum) = yes], [$3], [$4])[]dnl +AS_VAR_POPDEF([check_Enum])dnl +])dnl +# extract the value of a #define from a header +m4_define([GET_DEFINE], +[AC_LANG_PREPROC_REQUIRE()dnl +AS_VAR_PUSHDEF(get_Define, [rr_cv_get_define_$1])dnl +AC_CACHE_CHECK([for $1], get_Define, +[dnl + m4_ifvaln([$2],[dnl + echo "#include <$2>" > conftest.$ac_ext + echo "$1" >> conftest.$ac_ext + ],[dnl + echo "$1" > conftest.$ac_ext + ]) + if _AC_EVAL_STDERR([$ac_cpp conftest.$ac_ext >conftest.out]) >/dev/null; then + if test -s conftest.err; then + AS_VAR_SET(get_Define, $1) + else + AS_VAR_SET(get_Define, "$(tail -1 conftest.out)") + fi + else + AS_VAR_SET(get_Define, $1) + fi + rm -f conftest.err conftest.out conftest.$ac_ext +]) +TMP_GET_DEFINE=AS_VAR_GET(get_Define) +TMP_GET_DEFINE=${TMP_GET_DEFINE% } +TMP_GET_DEFINE=${TMP_GET_DEFINE% } +AS_IF([test "$TMP_GET_DEFINE" = $1], [$3], [$1="$TMP_GET_DEFINE"])[]dnl +AS_VAR_POPDEF([get_Define])dnl +])dnl GET_DEFINE |