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) 1998-2012 Free Software Foundation, Inc.
5 dnl This file is part of GNU Make.
7 dnl GNU Make is free software; you can redistribute it and/or modify it under
8 dnl the terms of the GNU General Public License as published by the Free
9 dnl Software Foundation; either version 3 of the License, or (at your option)
10 dnl any later version.
12 dnl GNU Make is distributed in the hope that it will be useful, but WITHOUT
13 dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 dnl FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for.
17 dnl You should have received a copy of the GNU General Public License along
18 dnl with this program. If not, see <http://www.gnu.org/licenses/>.
20 dnl ---------------------------------------------------------------------------
21 dnl Got this from the lynx 2.8 distribution.
22 dnl by T.E.Dickey <dickey@clark.net>
23 dnl and Jim Spath <jspath@mail.bcpl.lib.md.us>
24 dnl and Philippe De Muyter <phdm@macqel.be>
26 dnl Created: 1997/1/28
27 dnl Updated: 1997/12/23
28 dnl ---------------------------------------------------------------------------
29 dnl After checking for functions in the default $LIBS, make a further check
30 dnl for the functions that are netlib-related (these aren't always in the
31 dnl libc, etc., and have to be handled specially because there are conflicting
32 dnl and broken implementations.
33 dnl Common library requirements (in order):
34 dnl -lresolv -lsocket -lnsl
38 AC_DEFUN([CF_NETLIBS],[
40 AC_MSG_CHECKING(for network libraries)
41 AC_CACHE_VAL(cf_cv_netlibs,[
42 AC_MSG_RESULT(working...)
45 AC_CHECK_FUNCS(gethostname,,[
46 CF_RECHECK_FUNC(gethostname,nsl,cf_cv_netlibs,[
47 CF_RECHECK_FUNC(gethostname,socket,cf_cv_netlibs)])])
49 # FIXME: sequent needs this library (i.e., -lsocket -linet -lnsl), but
50 # I don't know the entrypoints - 97/7/22 TD
51 AC_CHECK_LIB(inet,main,cf_cv_netlibs="-linet $cf_cv_netlibs")
53 if test "$ac_cv_func_lsocket" != no ; then
54 AC_CHECK_FUNCS(socket,,[
55 CF_RECHECK_FUNC(socket,socket,cf_cv_netlibs,[
56 CF_RECHECK_FUNC(socket,bsd,cf_cv_netlibs)])])
59 AC_CHECK_FUNCS(gethostbyname,,[
60 CF_RECHECK_FUNC(gethostbyname,nsl,cf_cv_netlibs)])
62 LIBS="$LIBS $cf_cv_netlibs"
63 test $cf_test_netlibs = no && echo "$cf_cv_netlibs" >&AC_FD_MSG
65 dnl ---------------------------------------------------------------------------
66 dnl Re-check on a function to see if we can pick it up by adding a library.
67 dnl $1 = function to check
68 dnl $2 = library to check in
69 dnl $3 = environment to update (e.g., $LIBS)
70 dnl $4 = what to do if this fails
72 dnl This uses 'unset' if the shell happens to support it, but leaves the
73 dnl configuration variable set to 'unknown' if not. This is a little better
74 dnl than the normal autoconf test, which gives misleading results if a test
75 dnl for the function is made (e.g., with AC_CHECK_FUNC) after this macro is
76 dnl used (autoconf does not distinguish between a null token and one that is
78 AC_DEFUN([CF_RECHECK_FUNC],[
80 CF_UPPER(cf_tr_func,$1)
81 AC_DEFINE_UNQUOTED(HAVE_$cf_tr_func,1,[Define if you have function $1])
85 unset ac_cv_func_$1 2>/dev/null
89 dnl ---------------------------------------------------------------------------
90 dnl Make an uppercase version of a variable
95 $1=`echo $2 | tr '[a-z]' '[A-Z]'`
100 dnl ---------------------------------------------------------------------------
101 dnl From Paul Eggert <eggert@twinsun.com>
102 dnl Update for Darwin by Troy Runkel <Troy.Runkel@mathworks.com>
103 dnl Update for AIX by Olexiy Buyanskyy (Savannah bug 32485)
105 AC_DEFUN([AC_STRUCT_ST_MTIM_NSEC],
106 [AC_CACHE_CHECK([for nanoseconds field of struct stat],
107 ac_cv_struct_st_mtim_nsec,
108 [ac_save_CPPFLAGS="$CPPFLAGS"
109 ac_cv_struct_st_mtim_nsec=no
110 # st_mtim.tv_nsec -- the usual case
111 # st_mtim._tv_nsec -- Solaris 2.6, if
112 # (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1
113 # && !defined __EXTENSIONS__)
114 # st_mtim.st__tim.tv_nsec -- UnixWare 2.1.2
115 # st_mtime_n -- AIX 5.2 and above
116 # st_mtimespec.tv_nsec -- Darwin (Mac OSX)
117 for ac_val in st_mtim.tv_nsec st_mtim._tv_nsec st_mtim.st__tim.tv_nsec st_mtime_n st_mtimespec.tv_nsec; do
118 CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val"
119 AC_TRY_COMPILE([#include <sys/types.h>
120 #include <sys/stat.h>
121 ], [struct stat s; s.ST_MTIM_NSEC;],
122 [ac_cv_struct_st_mtim_nsec=$ac_val; break])
124 CPPFLAGS="$ac_save_CPPFLAGS"
127 if test $ac_cv_struct_st_mtim_nsec != no; then
128 AC_DEFINE_UNQUOTED([ST_MTIM_NSEC], [$ac_cv_struct_st_mtim_nsec],
129 [Define if struct stat contains a nanoseconds field])