X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Funlocked-io.m4;h=6a1dec27825fd05440e544060f73664589bff9c0;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=cd1c5f4ef7393da670629b9525f4eaa4d700fa8b;hpb=23fe10e274cf20fb2cb75ea1da9556a733106657;p=gnulib.git

diff --git a/m4/unlocked-io.m4 b/m4/unlocked-io.m4
index cd1c5f4ef..6a1dec278 100644
--- 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])
 ])