Mercurial > gnulib
view m4/popen.m4 @ 36940:c741bc27922a
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 | 807a2defea28 |
children | 344018b6e5d7 |
line wrap: on
line source
# popen.m4 serial 5 dnl Copyright (C) 2009-2013 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_POPEN], [ AC_REQUIRE([gl_STDIO_H_DEFAULTS]) AC_CHECK_FUNCS_ONCE([popen]) if test $ac_cv_func_popen = no; then HAVE_POPEN=0 else AC_CACHE_CHECK([whether popen works with closed stdin], [gl_cv_func_popen_works], [ AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <stdio.h>]], [[int result = 0; FILE *child; fclose (stdin); fclose (stdout); child = popen ("echo a", "r"); if (fgetc (child) != 'a') result |= 1; if (pclose (child) != 0) result |= 2; return result; ]])], [gl_cv_func_popen_works=yes], [gl_cv_func_popen_works=no], dnl For now, only cygwin 1.5 or older is known to be broken. [gl_cv_func_popen_works='guessing yes']) ]) if test "$gl_cv_func_popen_works" = no; then REPLACE_POPEN=1 fi fi ]) # Prerequisites of lib/popen.c. AC_DEFUN([gl_PREREQ_POPEN], [ : ])