X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fregex.m4;h=0945c11a08f3e9c4da8a6d22be05de4834075cf5;hb=ade95dda0df7e42c80c5e6d7cb51fe44d0663719;hp=6d29dcfb1da0081fc437c7843e57eac543118abc;hpb=0f0de03774e76123900873513602ff70be6d9be5;p=gnulib.git

diff --git a/m4/regex.m4 b/m4/regex.m4
index 6d29dcfb1..0945c11a0 100644
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -266,6 +266,7 @@ AC_DEFUN([gl_PREREQ_REGEX],
   AC_REQUIRE([AC_C_RESTRICT])
   AC_REQUIRE([AC_TYPE_MBSTATE_T])
   AC_REQUIRE([gl_EEMALLOC])
+  AC_REQUIRE([gl_GLIBC21])
   AC_CHECK_HEADERS([libintl.h])
   AC_CHECK_FUNCS_ONCE([isblank iswctype wcscoll])
   AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]])