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| 1 # unlocked-io.m4 serial 14 |
| 2 |
| 3 # Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
| 4 # Free Software Foundation, Inc. |
| 5 # |
| 6 # This file is free software; the Free Software Foundation |
| 7 # gives unlimited permission to copy and/or distribute it, |
| 8 # with or without modifications, as long as this notice is preserved. |
| 9 |
| 10 dnl From Jim Meyering. |
| 11 dnl |
| 12 dnl See if the glibc *_unlocked I/O macros or functions are available. |
| 13 dnl Use only those *_unlocked macros or functions that are declared |
| 14 dnl (because some of them were declared in Solaris 2.5.1 but were removed |
| 15 dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run |
| 16 dnl on Solaris 2.6). |
| 17 |
| 18 AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO], |
| 19 [ |
| 20 AC_DEFINE([USE_UNLOCKED_IO], 1, |
| 21 [Define to 1 if you want getc etc. to use unlocked I/O if available. |
| 22 Unlocked I/O can improve performance in unithreaded apps, |
| 23 but it is not safe for multithreaded apps.]) |
| 24 |
| 25 dnl Persuade glibc and Solaris <stdio.h> to declare |
| 26 dnl fgets_unlocked(), fputs_unlocked() etc. |
| 27 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
| 28 |
| 29 AC_CHECK_DECLS_ONCE([clearerr_unlocked]) |
| 30 AC_CHECK_DECLS_ONCE([feof_unlocked]) |
| 31 AC_CHECK_DECLS_ONCE([ferror_unlocked]) |
| 32 AC_CHECK_DECLS_ONCE([fflush_unlocked]) |
| 33 AC_CHECK_DECLS_ONCE([fgets_unlocked]) |
| 34 AC_CHECK_DECLS_ONCE([fputc_unlocked]) |
| 35 AC_CHECK_DECLS_ONCE([fputs_unlocked]) |
| 36 AC_CHECK_DECLS_ONCE([fread_unlocked]) |
| 37 AC_CHECK_DECLS_ONCE([fwrite_unlocked]) |
| 38 AC_CHECK_DECLS_ONCE([getc_unlocked]) |
| 39 AC_CHECK_DECLS_ONCE([getchar_unlocked]) |
| 40 AC_CHECK_DECLS_ONCE([putc_unlocked]) |
| 41 AC_CHECK_DECLS_ONCE([putchar_unlocked]) |
| 42 ]) |
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