(gl_FUNC_MEMRCHR): Check for memrchr decl.

diff --git a/m4/memrchr.m4 b/m4/memrchr.m4
index 8ce7d9e4678c8f73530869f7a11a0f115ae5d8b6..e2406ec8990d0d2bc8a837c5b4cd21e2973e0946 100644 (file)
--- a/m4/memrchr.m4
+++ b/m4/memrchr.m4
@@ -11,6 +11,8 @@ AC_DEFUN([gl_FUNC_MEMRCHR],
   dnl Persuade glibc <string.h> to declare memrchr().
   AC_REQUIRE([AC_GNU_SOURCE])
 
+  AC_CHECK_DECLS_ONCE([memrchr])
+
   AC_REPLACE_FUNCS(memrchr)
   if test $ac_cv_func_memrchr = no; then
     gl_PREREQ_MEMRCHR