fix typos

[gnulib.git] / m4 / jm-macros.m4

diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 317ea28..ebc1946 100644 (file)
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -1,4 +1,4 @@
-#serial 14
+#serial 16
 
 dnl Misc type-related macros for fileutils, sh-utils, textutils.
 
@@ -195,11 +195,11 @@ AC_DEFUN(jm_MACROS,
 # This macro must be invoked before any tests that run the compiler.
 AC_DEFUN(jm_CHECK_ALL_TYPES,
 [
-  # Enable GNU extensions.
-  # Define this here, not in acconfig's @TOP@ section, since definitions
-  # in the latter don't make it into the configure-time tests.
-  AC_DEFINE([_GNU_SOURCE], 1,
-    [Enable GNU extensions on systems that have them.])
+  # Emit this code into config.h.in.
+  # The ifndef is to avoid redefinition warnings.
+  AH_VERBATIM([_GNU_SOURCE], [#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif])
 
   dnl This test must come as early as possible after the compiler configuration
   dnl tests, because the choice of the file model can (in principle) affect