Generate #error instead of just letting the compile fail.

diff --git a/include/ac/regex.h b/include/ac/regex.h
index 87033a8b7e1cfe342d086b00946e68d2d07a230c..99afaec3d8756a9aaf485ba7e7136006713815d5 100644 (file)
--- a/include/ac/regex.h
+++ b/include/ac/regex.h
@@ -24,6 +24,7 @@
 
        For NT: http://people.delphi.com/gjc/hs_regex.html
 */
+#error "No POSIX REGEX available."
 #else
        /* have regex.h, assume it's POSIX compliant */
 #      include <regex.h>