1 files changed, 31 insertions, 0 deletions
diff --git a/m4/error.m4 b/m4/error.m4
new file mode 100644
index 0000000..7a10344
--- /dev/null
+++ b/m4/error.m4
@@ -0,0 +1,31 @@
+#serial 15
+
+# Copyright (C) 1996-1998, 2001-2004, 2009-2022 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_ERROR],
+[
+  dnl We don't use AC_FUNC_ERROR_AT_LINE any more, because it is no longer
+  dnl maintained in Autoconf and because it invokes AC_LIBOBJ.
+  AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <error.h>]],
+          [[error_at_line (0, 0, "", 0, "an error occurred");]])],
+       [ac_cv_lib_error_at_line=yes],
+       [ac_cv_lib_error_at_line=no])])
+])
+
+# Prerequisites of lib/error.c.
+AC_DEFUN([gl_PREREQ_ERROR],
+[
+  dnl Use system extensions on Android, so that AC_FUNC_STRERROR_R
+  dnl discovers the GNU API for strerror_r on Android API level 23 and later.
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([AC_FUNC_STRERROR_R])
+  :
+])