1 # unlocked-io.m4 serial 16
3 # Copyright (C) 1998-2006, 2009-2021 Free Software Foundation, Inc.
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.
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
17 AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
19 dnl Persuade glibc and Solaris <stdio.h> to declare
20 dnl fgets_unlocked(), fputs_unlocked() etc.
21 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
23 AC_CHECK_DECLS_ONCE([clearerr_unlocked])
24 AC_CHECK_DECLS_ONCE([feof_unlocked])
25 AC_CHECK_DECLS_ONCE([ferror_unlocked])
26 AC_CHECK_DECLS_ONCE([fflush_unlocked])
27 AC_CHECK_DECLS_ONCE([fgets_unlocked])
28 AC_CHECK_DECLS_ONCE([fputc_unlocked])
29 AC_CHECK_DECLS_ONCE([fputs_unlocked])
30 AC_CHECK_DECLS_ONCE([fread_unlocked])
31 AC_CHECK_DECLS_ONCE([fwrite_unlocked])
32 AC_CHECK_DECLS_ONCE([getc_unlocked])
33 AC_CHECK_DECLS_ONCE([getchar_unlocked])
34 AC_CHECK_DECLS_ONCE([putc_unlocked])
35 AC_CHECK_DECLS_ONCE([putchar_unlocked])