X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=configure.ac;h=499571a70318f2d3bfe753e8a9be95307e7fc378;hp=1a375e9f57b0c9d589b24caf7faf2fe4b02a861e;hb=ac9f8fc0b4a20b3ec1d205029ef61321174d15b6;hpb=e5de57de1b8bf1df96c152fc92f5a49f75d6d96c

diff --git a/configure.ac b/configure.ac
index 1a375e9f..499571a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,20 +46,21 @@ AC_DEFUN([LIB_SUBST_FLAGS], [
 	AC_SUBST($1_cppflags)
 	AC_SUBST($1_ldflags)
 ])
+AC_DEFUN([REQUIRE_EXECUTABLE], [
+        AC_PATH_PROG(m4_toupper([$1]), [$1])
+        test -z "$m4_toupper([$1])" && AC_MSG_ERROR(
+		[$1 is required to build this package])
+])
 
 AC_USE_SYSTEM_EXTENSIONS
 AC_C_BIGENDIAN()
-
-AC_PATH_PROG([BISON], [bison])
-AC_PATH_PROG([FLEX], [flex])
-
-AC_PATH_PROG([M4], [m4])
-test -z "$M4" && AC_MSG_ERROR(
-	[The m4 macro processor is required to build this package])
-
 AC_PROG_CC
 AC_PROG_CPP
 
+REQUIRE_EXECUTABLE([bison])
+REQUIRE_EXECUTABLE([flex])
+REQUIRE_EXECUTABLE([m4])
+
 executables="recv filter audioc write afh play"
 ########################################################################### osl
 STASH_FLAGS