| # fdopen.m4 serial 3 |
| dnl Copyright (C) 2011-2016 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_FDOPEN], |
| [ |
| AC_REQUIRE([gl_STDIO_H_DEFAULTS]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_REQUIRE([gl_MSVC_INVAL]) |
| if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then |
| REPLACE_FDOPEN=1 |
| else |
| dnl Test whether fdopen() sets errno when it fails due to a bad fd argument. |
| AC_CACHE_CHECK([whether fdopen sets errno], [gl_cv_func_fdopen_works], |
| [ |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <stdio.h> |
| #include <errno.h> |
| int |
| main (void) |
| { |
| FILE *fp; |
| errno = 0; |
| fp = fdopen (-1, "r"); |
| if (fp == NULL && errno == 0) |
| return 1; |
| return 0; |
| }]])], |
| [gl_cv_func_fdopen_works=yes], |
| [gl_cv_func_fdopen_works=no], |
| [case "$host_os" in |
| mingw*) gl_cv_func_fdopen_works="guessing no" ;; |
| *) gl_cv_func_fdopen_works="guessing yes" ;; |
| esac |
| ]) |
| ]) |
| case "$gl_cv_func_fdopen_works" in |
| *no) REPLACE_FDOPEN=1 ;; |
| esac |
| fi |
| ]) |
| |
| dnl Prerequisites of lib/fdopen.c. |
| AC_DEFUN([gl_PREREQ_FDOPEN], []) |