3 dnl Copyright (C) 1998-2006, 2009-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
10 dnl See if the glibc *_unlocked I/O macros or functions are available.
11 dnl Use only those *_unlocked macros or functions that are declared
12 dnl (because some of them were declared in Solaris 2.5.1 but were removed
13 dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run
16 AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
18 dnl Persuade glibc and Solaris <stdio.h> to declare
19 dnl fgets_unlocked(), fputs_unlocked() etc.
20 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
22 AC_CHECK_DECLS_ONCE([clearerr_unlocked])
23 AC_CHECK_DECLS_ONCE([feof_unlocked])
24 AC_CHECK_DECLS_ONCE([ferror_unlocked])
25 AC_CHECK_DECLS_ONCE([fflush_unlocked])
26 AC_CHECK_DECLS_ONCE([fgets_unlocked])
27 AC_CHECK_DECLS_ONCE([fputc_unlocked])
28 AC_CHECK_DECLS_ONCE([fputs_unlocked])
29 AC_CHECK_DECLS_ONCE([fread_unlocked])
30 AC_CHECK_DECLS_ONCE([fwrite_unlocked])
31 AC_CHECK_DECLS_ONCE([getc_unlocked])
32 AC_CHECK_DECLS_ONCE([getchar_unlocked])
33 AC_CHECK_DECLS_ONCE([putc_unlocked])
34 AC_CHECK_DECLS_ONCE([putchar_unlocked])