1 dnl acinclude.m4 -- Extra macros needed for GNU make. 2 dnl 3 dnl Automake will incorporate this into its generated aclocal.m4. 4 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 5 dnl Free Software Foundation, Inc. 6 dnl This file is part of GNU Make. 7 dnl 8 dnl GNU Make is free software; you can redistribute it and/or modify it 9 dnl under the terms of the GNU General Public License as published by 10 dnl the Free Software Foundation; either version 2, or (at your option) 11 dnl any later version. 12 dnl 13 dnl GNU Make is distributed in the hope that it will be useful, but 14 dnl WITHOUT ANY WARRANTY; without even the implied warranty of 15 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 dnl General Public License for more details. 17 dnl 18 dnl You should have received a copy of the GNU General Public License 19 dnl along with GNU Make; see the file COPYING. If not, write to the 20 dnl Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 21 dnl MA 02110-1301 USA. 22 23 24 dnl --------------------------------------------------------------------------- 25 dnl Got this from the lynx 2.8 distribution. 26 dnl by T.E.Dickey <dickey (a] clark.net> 27 dnl and Jim Spath <jspath (a] mail.bcpl.lib.md.us> 28 dnl and Philippe De Muyter <phdm (a] macqel.be> 29 dnl 30 dnl Created: 1997/1/28 31 dnl Updated: 1997/12/23 32 dnl --------------------------------------------------------------------------- 33 dnl After checking for functions in the default $LIBS, make a further check 34 dnl for the functions that are netlib-related (these aren't always in the 35 dnl libc, etc., and have to be handled specially because there are conflicting 36 dnl and broken implementations. 37 dnl Common library requirements (in order): 38 dnl -lresolv -lsocket -lnsl 39 dnl -lnsl -lsocket 40 dnl -lsocket 41 dnl -lbsd 42 AC_DEFUN([CF_NETLIBS],[ 43 cf_test_netlibs=no 44 AC_MSG_CHECKING(for network libraries) 45 AC_CACHE_VAL(cf_cv_netlibs,[ 46 AC_MSG_RESULT(working...) 47 cf_cv_netlibs="" 48 cf_test_netlibs=yes 49 AC_CHECK_FUNCS(gethostname,,[ 50 CF_RECHECK_FUNC(gethostname,nsl,cf_cv_netlibs,[ 51 CF_RECHECK_FUNC(gethostname,socket,cf_cv_netlibs)])]) 52 # 53 # FIXME: sequent needs this library (i.e., -lsocket -linet -lnsl), but 54 # I don't know the entrypoints - 97/7/22 TD 55 AC_CHECK_LIB(inet,main,cf_cv_netlibs="-linet $cf_cv_netlibs") 56 # 57 if test "$ac_cv_func_lsocket" != no ; then 58 AC_CHECK_FUNCS(socket,,[ 59 CF_RECHECK_FUNC(socket,socket,cf_cv_netlibs,[ 60 CF_RECHECK_FUNC(socket,bsd,cf_cv_netlibs)])]) 61 fi 62 # 63 AC_CHECK_FUNCS(gethostbyname,,[ 64 CF_RECHECK_FUNC(gethostbyname,nsl,cf_cv_netlibs)]) 65 # 66 AC_CHECK_FUNCS(strcasecmp,,[ 67 CF_RECHECK_FUNC(strcasecmp,resolv,cf_cv_netlibs)]) 68 ]) 69 LIBS="$LIBS $cf_cv_netlibs" 70 test $cf_test_netlibs = no && echo "$cf_cv_netlibs" >&AC_FD_MSG 71 ])dnl 72 dnl --------------------------------------------------------------------------- 73 dnl Re-check on a function to see if we can pick it up by adding a library. 74 dnl $1 = function to check 75 dnl $2 = library to check in 76 dnl $3 = environment to update (e.g., $LIBS) 77 dnl $4 = what to do if this fails 78 dnl 79 dnl This uses 'unset' if the shell happens to support it, but leaves the 80 dnl configuration variable set to 'unknown' if not. This is a little better 81 dnl than the normal autoconf test, which gives misleading results if a test 82 dnl for the function is made (e.g., with AC_CHECK_FUNC) after this macro is 83 dnl used (autoconf does not distinguish between a null token and one that is 84 dnl set to 'no'). 85 AC_DEFUN([CF_RECHECK_FUNC],[ 86 AC_CHECK_LIB($2,$1,[ 87 CF_UPPER(cf_tr_func,$1) 88 AC_DEFINE_UNQUOTED(HAVE_$cf_tr_func,1,[Define if you have function $1]) 89 ac_cv_func_$1=yes 90 $3="-l$2 [$]$3"],[ 91 ac_cv_func_$1=unknown 92 unset ac_cv_func_$1 2>/dev/null 93 $4], 94 [[$]$3]) 95 ])dnl 96 dnl --------------------------------------------------------------------------- 97 dnl Make an uppercase version of a variable 98 dnl $1=uppercase($2) 99 AC_DEFUN([CF_UPPER], 100 [ 101 changequote(,)dnl 102 $1=`echo $2 | tr '[a-z]' '[A-Z]'` 103 changequote([,])dnl 104 ])dnl 105 106 107 dnl --------------------------------------------------------------------------- 108 dnl From Paul Eggert <eggert (a] twinsun.com> 109 110 AC_DEFUN([AC_STRUCT_ST_MTIM_NSEC], 111 [AC_CACHE_CHECK([for nanoseconds field of struct stat.st_mtim], 112 ac_cv_struct_st_mtim_nsec, 113 [ac_save_CPPFLAGS="$CPPFLAGS" 114 ac_cv_struct_st_mtim_nsec=no 115 # tv_nsec -- the usual case 116 # _tv_nsec -- Solaris 2.6, if 117 # (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1 118 # && !defined __EXTENSIONS__) 119 # st__tim.tv_nsec -- UnixWare 2.1.2 120 for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do 121 CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val" 122 AC_TRY_COMPILE([#include <sys/types.h> 123 #include <sys/stat.h> 124 ], [struct stat s; s.st_mtim.ST_MTIM_NSEC;], 125 [ac_cv_struct_st_mtim_nsec=$ac_val; break]) 126 done 127 CPPFLAGS="$ac_save_CPPFLAGS" 128 ]) 129 130 if test $ac_cv_struct_st_mtim_nsec != no; then 131 AC_DEFINE_UNQUOTED([ST_MTIM_NSEC], [$ac_cv_struct_st_mtim_nsec], 132 [Define if struct stat contains a nanoseconds field]) 133 fi 134 ] 135 ) 136
