-#serial 12
+#serial 14
dnl Copyright (C) 2002, 2005, 2007, 2009-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_CHECK_FUNCS_ONCE([dup2])
if test $ac_cv_func_dup2 = no; then
HAVE_DUP2=0
- AC_LIBOBJ([dup2])
fi
], [
AC_DEFINE([HAVE_DUP2], [1], [Define to 1 if you have the 'dup2' function.])
])
- AC_CHECK_FUNCS_ONCE([fcntl])
if test $HAVE_DUP2 = 1; then
AC_CACHE_CHECK([whether dup2 works], [gl_cv_func_dup2_works],
[AC_RUN_IFELSE([
#include <fcntl.h>
#include <errno.h>]],
[int result = 0;
-#if HAVE_FCNTL
+#ifdef FD_CLOEXEC
if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
result |= 1;
-#endif HAVE_FCNTL
+#endif
if (dup2 (1, 1) == 0)
result |= 2;
-#if HAVE_FCNTL
+#ifdef FD_CLOEXEC
if (fcntl (1, F_GETFD) != FD_CLOEXEC)
result |= 4;
#endif
esac])
])
if test "$gl_cv_func_dup2_works" = no; then
- gl_REPLACE_DUP2
+ REPLACE_DUP2=1
fi
fi
-])
-
-AC_DEFUN([gl_REPLACE_DUP2],
-[
- AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
- AC_CHECK_FUNCS_ONCE([dup2])
- if test $ac_cv_func_dup2 = yes; then
- REPLACE_DUP2=1
- fi
- AC_LIBOBJ([dup2])
+ dnl Replace dup2() for supporting the gnulib-defined fchdir() function,
+ dnl to keep fchdir's bookkeeping up-to-date.
+ m4_ifdef([gl_FUNC_FCHDIR], [
+ gl_TEST_FCHDIR
+ if test $HAVE_FCHDIR = 0; then
+ REPLACE_DUP2=1
+ fi
+ ])
])