Mercurial > gnulib
view m4/ptsname_r.m4 @ 17249:e542fd46ad6f
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | f0c9b2dc0596 |
children | 344018b6e5d7 |
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# ptsname_r.m4 serial 3 dnl Copyright (C) 2010-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_PTSNAME_R], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) dnl Persuade glibc <stdlib.h> to declare ptsname_r(). AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) AC_CHECK_FUNCS_ONCE([ptsname_r]) if test $ac_cv_func_ptsname_r = no; then HAVE_PTSNAME_R=0 else dnl On OSF/1 5.1, the type of the third argument is 'int', not 'size_t', dnl and the declaration is missing if _REENTRANT is not defined. AC_CACHE_CHECK([whether ptsname_r has the same signature as in glibc], [gl_cv_func_ptsname_r_signature_ok], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <stddef.h> #include <stdlib.h> /* Test whether ptsname_r is declared at all. */ int (*f) (int, char *, size_t) = ptsname_r; /* Test whether it has the same declaration as in glibc. */ #undef ptsname_r extern #ifdef __cplusplus "C" #endif int ptsname_r (int, char *, size_t); ]], [[return f (0, NULL, 0);]]) ], [gl_cv_func_ptsname_r_signature_ok=yes], [gl_cv_func_ptsname_r_signature_ok=no]) ]) if test $gl_cv_func_ptsname_r_signature_ok = no; then REPLACE_PTSNAME_R=1 fi fi ]) # Prerequisites of lib/ptsname.c. AC_DEFUN([gl_PREREQ_PTSNAME_R], [ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether isatty sets errno when it fails], [gl_cv_func_isatty_sets_errno], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <errno.h> #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ # include <io.h> #else # include <unistd.h> #endif ]], [[errno = 0; isatty (-1); return errno == 0; ]]) ], [gl_cv_func_isatty_sets_errno=yes], [gl_cv_func_isatty_sets_errno=no], [case "$host_os" in irix* | solaris* | mingw*) gl_cv_func_isatty_sets_errno="guessing no";; *) gl_cv_func_isatty_sets_errno="guessing yes";; esac ]) ]) case "$gl_cv_func_isatty_sets_errno" in *yes) ;; *) AC_DEFINE([ISATTY_FAILS_WITHOUT_SETTING_ERRNO], [1], [Define to 1 if isatty() may fail without setting errno.]) ;; esac ])