Commit 066b17df authored by Paul Eggert's avatar Paul Eggert

Merge from gnulib

* doc/misc/texinfo.tex: Update from gnulib.
* lib/getdtablesize.c, lib/getopt.c, lib/signal.in.h, lib/tempname.c:
* lib/tempname.h, m4/dup2.m4, m4/fcntl.m4, m4/getdtablesize.m4:
Update from gnulib, incorporating:
2015-02-20 getdtablesize: port better for Android
2015-02-19 fcntl: Fix cross compiling
2015-02-18 dup2, fcntl: cross-compile better for Android
2015-02-18 getopt: don't crash on memory exhaustion
2015-02-17 tempname: allow compilation with C++ (trivial)
2015-02-17 dup2, fcntl: port to AIX
2015-02-16 getdtablesize, dup2, fcntl: port to Android
2015-02-11 getdtablesize, signal_h: Fix Android build
2015-02-11 maint: various whitespace cleanups in tempname
parent 43fb42da
2015-02-21 Paul Eggert <eggert@cs.ucla.edu>
Merge from gnulib
* lib/getdtablesize.c, lib/getopt.c, lib/signal.in.h, lib/tempname.c:
* lib/tempname.h, m4/dup2.m4, m4/fcntl.m4, m4/getdtablesize.m4:
Update from gnulib, incorporating:
2015-02-20 getdtablesize: port better for Android
2015-02-19 fcntl: Fix cross compiling
2015-02-18 dup2, fcntl: cross-compile better for Android
2015-02-18 getopt: don't crash on memory exhaustion
2015-02-17 tempname: allow compilation with C++ (trivial)
2015-02-17 dup2, fcntl: port to AIX
2015-02-16 getdtablesize, dup2, fcntl: port to Android
2015-02-11 getdtablesize, signal_h: Fix Android build
2015-02-11 maint: various whitespace cleanups in tempname
2015-02-13 Jan Djärv <jan.h.d@swipnet.se>
* configure.ac: Set locallisppath to empty for NS self contained,
......
2015-02-21 Paul Eggert <eggert@cs.ucla.edu>
* texinfo.tex: Update from gnulib.
2015-02-10 Lars Ingebrigtsen <larsi@gnus.org>
* eww.texi (Basics): Mention eww-toggle-fonts.
......
......@@ -3,7 +3,7 @@
% Load plain if necessary, i.e., if running under initex.
\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
%
\def\texinfoversion{2015-01-31.10}
\def\texinfoversion{2015-02-05.16}
%
% Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
% 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
......@@ -4489,7 +4489,6 @@
% Called from \indexdummies and \atdummies.
%
\def\commondummies{%
%
% \definedummyword defines \#1 as \string\#1\space, thus effectively
% preventing its expansion. This is used only for control words,
% not control letters, because the \space would be incorrect for
......@@ -4566,6 +4565,7 @@
\definedummyword\guilsinglright
\definedummyword\lbracechar
\definedummyword\leq
\definedummyword\mathopsup
\definedummyword\minus
\definedummyword\ogonek
\definedummyword\pounds
......@@ -4579,6 +4579,8 @@
\definedummyword\quotesinglbase
\definedummyword\rbracechar
\definedummyword\result
\definedummyword\sub
\definedummyword\sup
\definedummyword\textdegree
%
% We want to disable all macros so that they are not expanded by \write.
......@@ -4653,6 +4655,7 @@
\definedummyword\samp
\definedummyword\strong
\definedummyword\tie
\definedummyword\U
\definedummyword\uref
\definedummyword\url
\definedummyword\var
......@@ -8335,14 +8338,7 @@
\catcode`\\=\other
%
% Make the characters 128-255 be printing characters.
{%
\count1=128
\def\loop{%
\catcode\count1=\other
\advance\count1 by 1
\ifnum \count1<256 \loop \fi
}%
}%
{\setnonasciicharscatcodenonglobal\other}%
%
% @ is our escape character in .aux files, and we need braces.
\catcode`\{=1
......@@ -9831,15 +9827,51 @@
\DeclareUnicodeCharacter{2261}{\equiv}
}% end of \utfeightchardefs
% US-ASCII character definitions.
\def\asciichardefs{% nothing need be done
\relax
}
% Latin1 (ISO-8859-1) character definitions.
\def\nonasciistringdefs{%
\setnonasciicharscatcode\active
\def\defstringchar##1{\def##1{\string##1}}%
\defstringchar^^a0\defstringchar^^a1\defstringchar^^a2\defstringchar^^a3%
\defstringchar^^a4\defstringchar^^a5\defstringchar^^a6\defstringchar^^a7%
\defstringchar^^a8\defstringchar^^a9\defstringchar^^aa\defstringchar^^ab%
\defstringchar^^ac\defstringchar^^ad\defstringchar^^ae\defstringchar^^af%
%
\defstringchar^^b0\defstringchar^^b1\defstringchar^^b2\defstringchar^^b3%
\defstringchar^^b4\defstringchar^^b5\defstringchar^^b6\defstringchar^^b7%
\defstringchar^^b8\defstringchar^^b9\defstringchar^^ba\defstringchar^^bb%
\defstringchar^^bc\defstringchar^^bd\defstringchar^^be\defstringchar^^bf%
%
\defstringchar^^c0\defstringchar^^c1\defstringchar^^c2\defstringchar^^c3%
\defstringchar^^c4\defstringchar^^c5\defstringchar^^c6\defstringchar^^c7%
\defstringchar^^c8\defstringchar^^c9\defstringchar^^ca\defstringchar^^cb%
\defstringchar^^cc\defstringchar^^cd\defstringchar^^ce\defstringchar^^cf%
%
\defstringchar^^d0\defstringchar^^d1\defstringchar^^d2\defstringchar^^d3%
\defstringchar^^d4\defstringchar^^d5\defstringchar^^d6\defstringchar^^d7%
\defstringchar^^d8\defstringchar^^d9\defstringchar^^da\defstringchar^^db%
\defstringchar^^dc\defstringchar^^dd\defstringchar^^de\defstringchar^^df%
%
\defstringchar^^e0\defstringchar^^e1\defstringchar^^e2\defstringchar^^e3%
\defstringchar^^e4\defstringchar^^e5\defstringchar^^e6\defstringchar^^e7%
\defstringchar^^e8\defstringchar^^e9\defstringchar^^ea\defstringchar^^eb%
\defstringchar^^ec\defstringchar^^ed\defstringchar^^ee\defstringchar^^ef%
%
\defstringchar^^f0\defstringchar^^f1\defstringchar^^f2\defstringchar^^f3%
\defstringchar^^f4\defstringchar^^f5\defstringchar^^f6\defstringchar^^f7%
\defstringchar^^f8\defstringchar^^f9\defstringchar^^fa\defstringchar^^fb%
\defstringchar^^fc\defstringchar^^fd\defstringchar^^fe\defstringchar^^ff%
}
% define all the unicode characters we know about, for the sake of @U.
\utfeightchardefs
% Make non-ASCII characters printable again for compatibility with
% existing Texinfo documents that may use them, even without declaring a
% document encoding.
......@@ -10193,6 +10225,7 @@
%
{@catcode`- = @active
@gdef@normalturnoffactive{%
@nonasciistringdefs
@let-=@normaldash
@let"=@normaldoublequote
@let$=@normaldollar %$ font-lock fix
......
......@@ -84,32 +84,31 @@ getdtablesize (void)
return dtablesize;
}
#elif HAVE_GETDTABLESIZE
#else
# include <limits.h>
# include <sys/resource.h>
# undef getdtablesize
# ifdef __CYGWIN__
/* Cygwin 1.7.25 auto-increases the RLIMIT_NOFILE soft limit until it
hits the compile-time constant hard limit of 3200. We might as
well just report the hard limit. */
# define rlim_cur rlim_max
# endif
int
rpl_getdtablesize(void)
getdtablesize (void)
{
/* To date, this replacement is only compiled for Cygwin 1.7.25,
which auto-increased the RLIMIT_NOFILE soft limit until it
hits the compile-time constant hard limit of 3200. Although
that version of cygwin supported a child process inheriting
a smaller soft limit, the smaller limit is not enforced, so
we might as well just report the hard limit. */
struct rlimit lim;
if (!getrlimit (RLIMIT_NOFILE, &lim) && lim.rlim_max != RLIM_INFINITY)
return lim.rlim_max;
return getdtablesize ();
}
#elif defined _SC_OPEN_MAX
if (getrlimit (RLIMIT_NOFILE, &lim) == 0
&& 0 <= lim.rlim_cur && lim.rlim_cur <= INT_MAX
&& lim.rlim_cur != RLIM_INFINITY
&& lim.rlim_cur != RLIM_SAVED_CUR
&& lim.rlim_cur != RLIM_SAVED_MAX)
return lim.rlim_cur;
int
getdtablesize (void)
{
return sysconf (_SC_OPEN_MAX);
return INT_MAX;
}
#endif
......@@ -487,7 +487,20 @@ _getopt_internal_r (int argc, char **argv, const char *optstring,
const struct option *p;
struct option_list *next;
} *ambig_list = NULL;
#ifdef _LIBC
/* malloc() not used for _LIBC to simplify failure messages. */
# define free_option_list(l)
#else
# define free_option_list(l) \
while (l != NULL) \
{ \
struct option_list *pn = l->next; \
free (l); \
l = pn; \
}
#endif
int exact = 0;
int ambig = 0;
int indfound = -1;
int option_index;
......@@ -514,22 +527,37 @@ _getopt_internal_r (int argc, char **argv, const char *optstring,
pfound = p;
indfound = option_index;
}
else if (ambig)
; /* Taking simpler path to handling ambiguities. */
else if (long_only
|| pfound->has_arg != p->has_arg
|| pfound->flag != p->flag
|| pfound->val != p->val)
{
/* Second or later nonexact match found. */
#ifdef _LIBC
struct option_list *newp = alloca (sizeof (*newp));
#else
struct option_list *newp = malloc (sizeof (*newp));
newp->p = p;
newp->next = ambig_list;
ambig_list = newp;
if (newp == NULL)
{
free_option_list (ambig_list);
ambig_list = NULL;
ambig = 1; /* Use simpler fallback message. */
}
else
#endif
{
newp->p = p;
newp->next = ambig_list;
ambig_list = newp;
}
}
}
if (ambig_list != NULL && !exact)
if ((ambig || ambig_list) && !exact)
{
if (print_errors)
if (print_errors && ambig_list)
{
struct option_list first;
first.p = pfound;
......@@ -585,18 +613,20 @@ _getopt_internal_r (int argc, char **argv, const char *optstring,
fputc ('\n', stderr);
#endif
}
else if (print_errors && ambig)
{
fprintf (stderr,
_("%s: option '%s' is ambiguous\n"),
argv[0], argv[d->optind]);
}
d->__nextchar += strlen (d->__nextchar);
d->optind++;
d->optopt = 0;
free_option_list (ambig_list);
return '?';
}
while (ambig_list != NULL)
{
struct option_list *pn = ambig_list->next;
free (ambig_list);
ambig_list = pn;
}
free_option_list (ambig_list);
if (pfound != NULL)
{
......
......@@ -55,11 +55,13 @@
#ifndef _@GUARD_PREFIX@_SIGNAL_H
#define _@GUARD_PREFIX@_SIGNAL_H
/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
pthread_sigmask in <pthread.h>, not in <signal.h>.
/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android
declare pthread_sigmask in <pthread.h>, not in <signal.h>.
But avoid namespace pollution on glibc systems.*/
#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
&& ((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ || defined __sun) \
&& ((defined __APPLE__ && defined __MACH__) \
|| defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ \
|| defined __sun || defined __ANDROID__) \
&& ! defined __GLIBC__
# include <pthread.h>
#endif
......
......@@ -62,6 +62,7 @@
# define struct_stat64 struct stat64
#else
# define struct_stat64 struct stat
# define __try_tempname try_tempname
# define __gen_tempname gen_tempname
# define __getpid getpid
# define __gettimeofday gettimeofday
......@@ -176,21 +177,9 @@ __path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
static const char letters[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
/* Generate a temporary file name based on TMPL. TMPL must match the
rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
The name constructed does not exist at the time of the call to
__gen_tempname. TMPL is overwritten with the result.
KIND may be one of:
__GT_NOCREATE: simply verify that the name does not exist
at the time of the call.
__GT_FILE: create the file using open(O_CREAT|O_EXCL)
and return a read-write fd. The file is mode 0600.
__GT_DIR: create a directory, which will be mode 0700.
We use a clever algorithm to get hard-to-predict names. */
int
__gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
__try_tempname (char *tmpl, int suffixlen, void *args,
int (*tryfunc) (char *, void *))
{
int len;
char *XXXXXX;
......@@ -199,7 +188,6 @@ __gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
unsigned int count;
int fd = -1;
int save_errno = errno;
struct_stat64 st;
/* A lower bound on the number of temporary files to attempt to
generate. The maximum total number of temporary file names that
......@@ -256,41 +244,7 @@ __gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
v /= 62;
XXXXXX[5] = letters[v % 62];
switch (kind)
{
case __GT_FILE:
fd = __open (tmpl,
(flags & ~O_ACCMODE)
| O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
break;
case __GT_DIR:
fd = __mkdir (tmpl, S_IRUSR | S_IWUSR | S_IXUSR);
break;
case __GT_NOCREATE:
/* This case is backward from the other three. __gen_tempname
succeeds if __xstat fails because the name does not exist.
Note the continue to bypass the common logic at the bottom
of the loop. */
if (__lxstat64 (_STAT_VER, tmpl, &st) < 0)
{
if (errno == ENOENT)
{
__set_errno (save_errno);
return 0;
}
else
/* Give up now. */
return -1;
}
continue;
default:
assert (! "invalid KIND in __gen_tempname");
abort ();
}
fd = tryfunc (tmpl, args);
if (fd >= 0)
{
__set_errno (save_errno);
......@@ -304,3 +258,67 @@ __gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
__set_errno (EEXIST);
return -1;
}
static int
try_file (char *tmpl, void *flags)
{
int *openflags = flags;
return __open (tmpl,
(*openflags & ~O_ACCMODE)
| O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
}
static int
try_dir (char *tmpl, void *flags)
{
return __mkdir (tmpl, S_IRUSR | S_IWUSR | S_IXUSR);
}
static int
try_nocreate (char *tmpl, void *flags)
{
struct_stat64 st;
if (__lxstat64 (_STAT_VER, tmpl, &st) == 0)
__set_errno (EEXIST);
return errno == ENOENT ? 0 : -1;
}
/* Generate a temporary file name based on TMPL. TMPL must match the
rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
The name constructed does not exist at the time of the call to
__gen_tempname. TMPL is overwritten with the result.
KIND may be one of:
__GT_NOCREATE: simply verify that the name does not exist
at the time of the call.
__GT_FILE: create the file using open(O_CREAT|O_EXCL)
and return a read-write fd. The file is mode 0600.
__GT_DIR: create a directory, which will be mode 0700.
We use a clever algorithm to get hard-to-predict names. */
int
__gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
{
int (*tryfunc) (char *, void *);
switch (kind)
{
case __GT_FILE:
tryfunc = try_file;
break;
case __GT_DIR:
tryfunc = try_dir;
break;
case __GT_NOCREATE:
tryfunc = try_nocreate;
break;
default:
assert (! "invalid KIND in __gen_tempname");
abort ();
}
return __try_tempname (tmpl, suffixlen, &flags, tryfunc);
}
......@@ -32,6 +32,10 @@
# define GT_NOCREATE 2
# endif
#ifdef __cplusplus
extern "C" {
#endif
/* Generate a temporary file name based on TMPL. TMPL must match the
rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
The name constructed does not exist at the time of the call to
......@@ -47,4 +51,15 @@
We use a clever algorithm to get hard-to-predict names. */
extern int gen_tempname (char *tmpl, int suffixlen, int flags, int kind);
/* Similar to gen_tempname, but TRYFUNC is called for each temporary
name to try. If TRYFUNC returns a non-negative number, TRY_GEN_TEMPNAME
returns with this value. Otherwise, if errno is set to EEXIST, another
name is tried, or else TRY_GEN_TEMPNAME returns -1. */
extern int try_tempname (char *tmpl, int suffixlen, void *args,
int (*tryfunc) (char *, void *));
#ifdef __cplusplus
}
#endif
#endif /* GL_TEMPNAME_H */
#serial 20
#serial 22
dnl Copyright (C) 2002, 2005, 2007, 2009-2015 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
......@@ -8,7 +8,6 @@ AC_DEFUN([gl_FUNC_DUP2],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([getdtablesize])
m4_ifdef([gl_FUNC_DUP2_OBSOLETE], [
AC_CHECK_FUNCS_ONCE([dup2])
if test $ac_cv_func_dup2 = no; then
......@@ -20,38 +19,44 @@ AC_DEFUN([gl_FUNC_DUP2],
if test $HAVE_DUP2 = 1; then
AC_CACHE_CHECK([whether dup2 works], [gl_cv_func_dup2_works],
[AC_RUN_IFELSE([
AC_LANG_PROGRAM([[#include <unistd.h>
#include <fcntl.h>
#include <errno.h>]],
[int result = 0;
#ifdef HAVE_GETDTABLESIZE
int bad_fd = getdtablesize ();
#else
int bad_fd = 1000000;
#endif
#ifdef FD_CLOEXEC
if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
result |= 1;
#endif
if (dup2 (1, 1) == 0)
result |= 2;
#ifdef FD_CLOEXEC
if (fcntl (1, F_GETFD) != FD_CLOEXEC)
result |= 4;
#endif
close (0);
if (dup2 (0, 0) != -1)
result |= 8;
/* Many gnulib modules require POSIX conformance of EBADF. */
if (dup2 (2, bad_fd) == -1 && errno != EBADF)
result |= 16;
/* Flush out some cygwin core dumps. */
if (dup2 (2, -1) != -1 || errno != EBADF)
result |= 32;
dup2 (2, 255);
dup2 (2, 256);
return result;
])
AC_LANG_PROGRAM(
[[#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/resource.h>
#include <unistd.h>
]],
[[int result = 0;
int bad_fd = INT_MAX;
struct rlimit rlim;
if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
&& 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
&& rlim.rlim_cur != RLIM_INFINITY
&& rlim.rlim_cur != RLIM_SAVED_MAX
&& rlim.rlim_cur != RLIM_SAVED_CUR)
bad_fd = rlim.rlim_cur;
#ifdef FD_CLOEXEC
if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
result |= 1;
#endif
if (dup2 (1, 1) == 0)
result |= 2;
#ifdef FD_CLOEXEC
if (fcntl (1, F_GETFD) != FD_CLOEXEC)
result |= 4;
#endif
close (0);
if (dup2 (0, 0) != -1)
result |= 8;
/* Many gnulib modules require POSIX conformance of EBADF. */
if (dup2 (2, bad_fd) == -1 && errno != EBADF)
result |= 16;
/* Flush out some cygwin core dumps. */
if (dup2 (2, -1) != -1 || errno != EBADF)
result |= 32;
dup2 (2, 255);
dup2 (2, 256);
return result;]])
],
[gl_cv_func_dup2_works=yes], [gl_cv_func_dup2_works=no],
[case "$host_os" in
......@@ -59,9 +64,6 @@ AC_DEFUN([gl_FUNC_DUP2],
gl_cv_func_dup2_works="guessing no" ;;
cygwin*) # on cygwin 1.5.x, dup2(1,1) returns 0
gl_cv_func_dup2_works="guessing 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="guessing no" ;;
aix* | freebsd*)
# on AIX 7.1 and FreeBSD 6.1, dup2 (1,toobig) gives EMFILE,
# not EBADF.
......
# fcntl.m4 serial 5
# fcntl.m4 serial 7
dnl Copyright (C) 2009-2015 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
......@@ -19,7 +19,7 @@ AC_DEFUN([gl_FUNC_FCNTL],
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gl_FCNTL_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([fcntl getdtablesize])
AC_CHECK_FUNCS_ONCE([fcntl])
if test $ac_cv_func_fcntl = no; then
gl_REPLACE_FCNTL
else
......@@ -27,30 +27,34 @@ AC_DEFUN([gl_FUNC_FCNTL],
dnl haiku alpha 2 F_DUPFD has wrong errno
AC_CACHE_CHECK([whether fcntl handles F_DUPFD correctly],
[gl_cv_func_fcntl_f_dupfd_works],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_GETDTABLESIZE
# include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>
]], [[int result = 0;
#ifdef HAVE_GETDTABLESIZE
int bad_fd = getdtablesize ();
#else
int bad_fd = 1000000;
#endif
if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
if (errno != EINVAL) result |= 2;
if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4;
if (errno != EINVAL) result |= 8;
return result;
]])],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/resource.h>
#include <unistd.h>
]],
[[int result = 0;
int bad_fd = INT_MAX;
struct rlimit rlim;
if (getrlimit (RLIMIT_NOFILE, &rlim) == 0
&& 0 <= rlim.rlim_cur && rlim.rlim_cur <= INT_MAX
&& rlim.rlim_cur != RLIM_INFINITY
&& rlim.rlim_cur != RLIM_SAVED_MAX
&& rlim.rlim_cur != RLIM_SAVED_CUR)
bad_fd = rlim.rlim_cur;
if (fcntl (0, F_DUPFD, -1) != -1) result |= 1;
if (errno != EINVAL) result |= 2;
if (fcntl (0, F_DUPFD, bad_fd) != -1) result |= 4;
if (errno != EINVAL) result |= 8;
return result;]])],
[gl_cv_func_fcntl_f_dupfd_works=yes],
[gl_cv_func_fcntl_f_dupfd_works=no],
[# Guess that it works on glibc systems
case $host_os in #((
*-gnu*) gl_cv_func_fcntl_f_dupfd_works="guessing yes";;
*) gl_cv_func_fcntl_f_dupfd_works="guessing no";;
[case $host_os in
aix* | cygwin* | haiku*)
gl_cv_func_fcntl_f_dupfd_works="guessing no" ;;
*) gl_cv_func_fcntl_f_dupfd_works="guessing yes" ;;