maint: update copyright

[gnulib.git] / m4 / unlocked-io.m4

diff --git a/m4/unlocked-io.m4 b/m4/unlocked-io.m4
index cd1c5f4..6a1dec2 100644 (file)
--- a/m4/unlocked-io.m4
+++ b/m4/unlocked-io.m4
@@ -1,4 +1,10 @@
-#serial 9
+# unlocked-io.m4 serial 15
+
+# Copyright (C) 1998-2006, 2009-2014 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.
 
 dnl From Jim Meyering.
 dnl
@@ -10,13 +16,26 @@ dnl on Solaris 2.6).
 
 AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
 [
+  AC_DEFINE([USE_UNLOCKED_IO], [1],
+    [Define to 1 if you want getc etc. to use unlocked I/O if available.
+     Unlocked I/O can improve performance in unithreaded apps,
+     but it is not safe for multithreaded apps.])
+
   dnl Persuade glibc and Solaris <stdio.h> to declare
   dnl fgets_unlocked(), fputs_unlocked() etc.
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
-  AC_CHECK_DECLS_ONCE(
-     [clearerr_unlocked feof_unlocked ferror_unlocked
-      fflush_unlocked fgets_unlocked fputc_unlocked fputs_unlocked
-      fread_unlocked fwrite_unlocked getc_unlocked
-      getchar_unlocked putc_unlocked putchar_unlocked])
+  AC_CHECK_DECLS_ONCE([clearerr_unlocked])
+  AC_CHECK_DECLS_ONCE([feof_unlocked])
+  AC_CHECK_DECLS_ONCE([ferror_unlocked])
+  AC_CHECK_DECLS_ONCE([fflush_unlocked])
+  AC_CHECK_DECLS_ONCE([fgets_unlocked])
+  AC_CHECK_DECLS_ONCE([fputc_unlocked])
+  AC_CHECK_DECLS_ONCE([fputs_unlocked])
+  AC_CHECK_DECLS_ONCE([fread_unlocked])
+  AC_CHECK_DECLS_ONCE([fwrite_unlocked])
+  AC_CHECK_DECLS_ONCE([getc_unlocked])
+  AC_CHECK_DECLS_ONCE([getchar_unlocked])
+  AC_CHECK_DECLS_ONCE([putc_unlocked])
+  AC_CHECK_DECLS_ONCE([putchar_unlocked])
 ])