1 dnl acinclude.m4 -- Extra macros needed for GNU make.
3 dnl Automake will incorporate this into its generated aclocal.m4.
4 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 dnl 2008, 2009, 2010 Free Software Foundation, Inc.
6 dnl This file is part of GNU Make.
8 dnl GNU Make is free software; you can redistribute it and/or modify it under
9 dnl the terms of the GNU General Public License as published by the Free
10 dnl Software Foundation; either version 3 of the License, or (at your option)
11 dnl any later version.
13 dnl GNU Make is distributed in the hope that it will be useful, but WITHOUT
14 dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 dnl FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for.
18 dnl You should have received a copy of the GNU General Public License along
19 dnl with this program. If not, see <http://www.gnu.org/licenses/>.
21 dnl ---------------------------------------------------------------------------
22 dnl Got this from the lynx 2.8 distribution.
23 dnl by T.E.Dickey <dickey@clark.net>
24 dnl and Jim Spath <jspath@mail.bcpl.lib.md.us>
25 dnl and Philippe De Muyter <phdm@macqel.be>
27 dnl Created: 1997/1/28
28 dnl Updated: 1997/12/23
29 dnl ---------------------------------------------------------------------------
30 dnl After checking for functions in the default $LIBS, make a further check
31 dnl for the functions that are netlib-related (these aren't always in the
32 dnl libc, etc., and have to be handled specially because there are conflicting
33 dnl and broken implementations.
34 dnl Common library requirements (in order):
35 dnl -lresolv -lsocket -lnsl
39 AC_DEFUN([CF_NETLIBS],[
41 AC_MSG_CHECKING(for network libraries)
42 AC_CACHE_VAL(cf_cv_netlibs,[
43 AC_MSG_RESULT(working...)
46 AC_CHECK_FUNCS(gethostname,,[
47 CF_RECHECK_FUNC(gethostname,nsl,cf_cv_netlibs,[
48 CF_RECHECK_FUNC(gethostname,socket,cf_cv_netlibs)])])
50 # FIXME: sequent needs this library (i.e., -lsocket -linet -lnsl), but
51 # I don't know the entrypoints - 97/7/22 TD
52 AC_CHECK_LIB(inet,main,cf_cv_netlibs="-linet $cf_cv_netlibs")
54 if test "$ac_cv_func_lsocket" != no ; then
55 AC_CHECK_FUNCS(socket,,[
56 CF_RECHECK_FUNC(socket,socket,cf_cv_netlibs,[
57 CF_RECHECK_FUNC(socket,bsd,cf_cv_netlibs)])])
60 AC_CHECK_FUNCS(gethostbyname,,[
61 CF_RECHECK_FUNC(gethostbyname,nsl,cf_cv_netlibs)])
63 LIBS="$LIBS $cf_cv_netlibs"
64 test $cf_test_netlibs = no && echo "$cf_cv_netlibs" >&AC_FD_MSG
66 dnl ---------------------------------------------------------------------------
67 dnl Re-check on a function to see if we can pick it up by adding a library.
68 dnl $1 = function to check
69 dnl $2 = library to check in
70 dnl $3 = environment to update (e.g., $LIBS)
71 dnl $4 = what to do if this fails
73 dnl This uses 'unset' if the shell happens to support it, but leaves the
74 dnl configuration variable set to 'unknown' if not. This is a little better
75 dnl than the normal autoconf test, which gives misleading results if a test
76 dnl for the function is made (e.g., with AC_CHECK_FUNC) after this macro is
77 dnl used (autoconf does not distinguish between a null token and one that is
79 AC_DEFUN([CF_RECHECK_FUNC],[
81 CF_UPPER(cf_tr_func,$1)
82 AC_DEFINE_UNQUOTED(HAVE_$cf_tr_func,1,[Define if you have function $1])
86 unset ac_cv_func_$1 2>/dev/null
90 dnl ---------------------------------------------------------------------------
91 dnl Make an uppercase version of a variable
96 $1=`echo $2 | tr '[a-z]' '[A-Z]'`
101 dnl ---------------------------------------------------------------------------
102 dnl From Paul Eggert <eggert@twinsun.com>
104 AC_DEFUN([AC_STRUCT_ST_MTIM_NSEC],
105 [AC_CACHE_CHECK([for nanoseconds field of struct stat.st_mtim],
106 ac_cv_struct_st_mtim_nsec,
107 [ac_save_CPPFLAGS="$CPPFLAGS"
108 ac_cv_struct_st_mtim_nsec=no
109 # tv_nsec -- the usual case
110 # _tv_nsec -- Solaris 2.6, if
111 # (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1
112 # && !defined __EXTENSIONS__)
113 # st__tim.tv_nsec -- UnixWare 2.1.2
114 for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do
115 CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val"
116 AC_TRY_COMPILE([#include <sys/types.h>
117 #include <sys/stat.h>
118 ], [struct stat s; s.st_mtim.ST_MTIM_NSEC;],
119 [ac_cv_struct_st_mtim_nsec=$ac_val; break])
121 CPPFLAGS="$ac_save_CPPFLAGS"
124 if test $ac_cv_struct_st_mtim_nsec != no; then
125 AC_DEFINE_UNQUOTED([ST_MTIM_NSEC], [$ac_cv_struct_st_mtim_nsec],
126 [Define if struct stat contains a nanoseconds field])