X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=acinclude.m4;h=3cff28226989e6287a97b19fe7ec74249b6a7767;hb=fff2d8655192db3a32c5f9623832ed3ed1e1f912;hp=03382649873990904090b7242751907b068c1e0c;hpb=9c1d6e9fdebb85191fa709a3a2ba97008612de12;p=rrdtool.git

diff --git a/acinclude.m4 b/acinclude.m4
index 0338264..3cff282 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -38,7 +38,7 @@ AC_DEFUN([EX_CHECK_ALL],
 	     dnl remove the cached value and test again
 	     unset ac_cv_lib_$1_$2
              AC_CHECK_LIB($1,$2,[
-	         unset ac_cv_header_`echo $3 | sed "s/[^A-Za-z]/_/g"`
+	         unset ac_cv_header_`echo $3 | sed ['s/[^a-zA-Z0-9_]/_/g;s/^[0-9]/_/']`
 		 AC_CHECK_HEADER($3,[EX_CHECK_STATE=YES],[])
 	     ],[])
           else