mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
# unlocked-io.m4 serial 15
|
|
|
|
# Copyright (C) 1998-2006, 2009-2019 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
|
|
dnl See if the glibc *_unlocked I/O macros or functions are available.
|
|
dnl Use only those *_unlocked macros or functions that are declared
|
|
dnl (because some of them were declared in Solaris 2.5.1 but were removed
|
|
dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run
|
|
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])
|
|
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])
|
|
])
|