-#serial 9
-dnl Copyright (C) 2002, 2005, 2007, 2009 Free Software Foundation, Inc.
+#serial 10
+dnl Copyright (C) 2002, 2005, 2007, 2009-2010 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.
return 0;
])
],
- [gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
- [case "$host_os" in
- mingw*) # on this platform, dup2 always returns 0 for success
- gl_cv_func_dup2_works=no;;
- cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
- gl_cv_func_dup2_works=no;;
- linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a
- # closed fd may yield -EBADF instead of -1 / errno=EBADF.
- gl_cv_func_dup2_works=no;;
+ [gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
+ [case "$host_os" in
+ mingw*) # on this platform, dup2 always returns 0 for success
+ gl_cv_func_dup2_works=no;;
+ cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
+ gl_cv_func_dup2_works=no;;
+ linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a
+ # closed fd may yield -EBADF instead of -1 / errno=EBADF.
+ gl_cv_func_dup2_works=no;;
freebsd*) # on FreeBSD 6.1, dup2(1,1000000) gives EMFILE, not EBADF.
- gl_cv_func_dup2_works=no;;
- *) gl_cv_func_dup2_works=yes;;
- esac])
+ gl_cv_func_dup2_works=no;;
+ *) gl_cv_func_dup2_works=yes;;
+ esac])
])
if test "$gl_cv_func_dup2_works" = no; then
gl_REPLACE_DUP2
fi
fi
- AC_DEFINE_UNQUOTED([REPLACE_DUP2], [$REPLACE_DUP2],
- [Define to 1 if dup2 returns 0 instead of the target fd.])
])
AC_DEFUN([gl_REPLACE_DUP2],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
- REPLACE_DUP2=1
+ if test $ac_cv_func_dup2 = yes; then
+ REPLACE_DUP2=1
+ fi
AC_LIBOBJ([dup2])
])