-# ptsname_r.m4 serial 1
-dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
+# 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_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
])