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-rw-r--r--gl/m4/dup2.m458
1 files changed, 0 insertions, 58 deletions
diff --git a/gl/m4/dup2.m4 b/gl/m4/dup2.m4
deleted file mode 100644
index 998d66f..0000000
--- a/gl/m4/dup2.m4
+++ /dev/null
@@ -1,58 +0,0 @@
1#serial 10
2dnl Copyright (C) 2002, 2005, 2007, 2009-2010 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_DUP2],
8[
9 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
10 AC_REQUIRE([AC_CANONICAL_HOST])
11 AC_CHECK_FUNCS_ONCE([dup2])
12 if test $ac_cv_func_dup2 = no; then
13 HAVE_DUP2=0
14 AC_LIBOBJ([dup2])
15 else
16 AC_CACHE_CHECK([whether dup2 works], [gl_cv_func_dup2_works],
17 [AC_RUN_IFELSE([
18 AC_LANG_PROGRAM([[#include <unistd.h>
19#include <errno.h>]],
20 [if (dup2 (1, 1) == 0)
21 return 1;
22 close (0);
23 if (dup2 (0, 0) != -1)
24 return 2;
25 /* Many gnulib modules require POSIX conformance of EBADF. */
26 if (dup2 (1, 1000000) == -1 && errno != EBADF)
27 return 3;
28 return 0;
29 ])
30 ],
31 [gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
32 [case "$host_os" in
33 mingw*) # on this platform, dup2 always returns 0 for success
34 gl_cv_func_dup2_works=no;;
35 cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
36 gl_cv_func_dup2_works=no;;
37 linux*) # On linux between 2008-07-27 and 2009-05-11, dup2 of a
38 # closed fd may yield -EBADF instead of -1 / errno=EBADF.
39 gl_cv_func_dup2_works=no;;
40 freebsd*) # on FreeBSD 6.1, dup2(1,1000000) gives EMFILE, not EBADF.
41 gl_cv_func_dup2_works=no;;
42 *) gl_cv_func_dup2_works=yes;;
43 esac])
44 ])
45 if test "$gl_cv_func_dup2_works" = no; then
46 gl_REPLACE_DUP2
47 fi
48 fi
49])
50
51AC_DEFUN([gl_REPLACE_DUP2],
52[
53 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
54 if test $ac_cv_func_dup2 = yes; then
55 REPLACE_DUP2=1
56 fi
57 AC_LIBOBJ([dup2])
58])