Index: lib/regex_internal.h
--- lib/regex_internal.h.orig	2009-03-31 08:52:25 +0200
+++ lib/regex_internal.h	2009-04-30 22:41:19 +0200
@@ -458,7 +458,9 @@
 #define re_string_skip_bytes(pstr,idx) ((pstr)->cur_idx += (idx))
 #define re_string_set_index(pstr,idx) ((pstr)->cur_idx = (idx))
 
+#ifdef HAVE_ALLOCA_H
 #include <alloca.h>
+#endif
 
 #ifndef _LIBC
 # if HAVE_ALLOCA