| 1 | # unlocked-io.m4 serial 15
|
|---|
| 2 |
|
|---|
| 3 | # Copyright (C) 1998-2006, 2009-2012 Free Software Foundation, Inc.
|
|---|
| 4 | #
|
|---|
| 5 | # This file is free software; the Free Software Foundation
|
|---|
| 6 | # gives unlimited permission to copy and/or distribute it,
|
|---|
| 7 | # with or without modifications, as long as this notice is preserved.
|
|---|
| 8 |
|
|---|
| 9 | dnl From Jim Meyering.
|
|---|
| 10 | dnl
|
|---|
| 11 | dnl See if the glibc *_unlocked I/O macros or functions are available.
|
|---|
| 12 | dnl Use only those *_unlocked macros or functions that are declared
|
|---|
| 13 | dnl (because some of them were declared in Solaris 2.5.1 but were removed
|
|---|
| 14 | dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run
|
|---|
| 15 | dnl on Solaris 2.6).
|
|---|
| 16 |
|
|---|
| 17 | AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
|
|---|
| 18 | [
|
|---|
| 19 | AC_DEFINE([USE_UNLOCKED_IO], [1],
|
|---|
| 20 | [Define to 1 if you want getc etc. to use unlocked I/O if available.
|
|---|
| 21 | Unlocked I/O can improve performance in unithreaded apps,
|
|---|
| 22 | but it is not safe for multithreaded apps.])
|
|---|
| 23 |
|
|---|
| 24 | dnl Persuade glibc and Solaris <stdio.h> to declare
|
|---|
| 25 | dnl fgets_unlocked(), fputs_unlocked() etc.
|
|---|
| 26 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
|
|---|
| 27 |
|
|---|
| 28 | AC_CHECK_DECLS_ONCE([clearerr_unlocked])
|
|---|
| 29 | AC_CHECK_DECLS_ONCE([feof_unlocked])
|
|---|
| 30 | AC_CHECK_DECLS_ONCE([ferror_unlocked])
|
|---|
| 31 | AC_CHECK_DECLS_ONCE([fflush_unlocked])
|
|---|
| 32 | AC_CHECK_DECLS_ONCE([fgets_unlocked])
|
|---|
| 33 | AC_CHECK_DECLS_ONCE([fputc_unlocked])
|
|---|
| 34 | AC_CHECK_DECLS_ONCE([fputs_unlocked])
|
|---|
| 35 | AC_CHECK_DECLS_ONCE([fread_unlocked])
|
|---|
| 36 | AC_CHECK_DECLS_ONCE([fwrite_unlocked])
|
|---|
| 37 | AC_CHECK_DECLS_ONCE([getc_unlocked])
|
|---|
| 38 | AC_CHECK_DECLS_ONCE([getchar_unlocked])
|
|---|
| 39 | AC_CHECK_DECLS_ONCE([putc_unlocked])
|
|---|
| 40 | AC_CHECK_DECLS_ONCE([putchar_unlocked])
|
|---|
| 41 | ])
|
|---|
