1 files changed, 26 insertions, 0 deletions
diff --git a/gl/m4/mempcpy.m4 b/gl/m4/mempcpy.m4
new file mode 100644
index 0000000..1107eb4
--- /dev/null
+++ b/gl/m4/mempcpy.m4
@@ -0,0 +1,26 @@
+# mempcpy.m4 serial 12
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2022 Free Software Foundation,
+dnl Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_MEMPCPY],
+[
+  dnl Persuade glibc <string.h> to declare mempcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  dnl The mempcpy() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS([mempcpy])
+  if test $ac_cv_func_mempcpy = no; then
+    HAVE_MEMPCPY=0
+  fi
+])
+
+# Prerequisites of lib/mempcpy.c.
+AC_DEFUN([gl_PREREQ_MEMPCPY], [
+  :
+])