1 # SYNOPSIS -*- Autoconf -*-
3 # NTP_ENABLE_LOCAL_LIBEVENT
4 # NTP_LIBEVENT_CHECK([MINVERSION [, DIR]])
5 # NTP_LIBEVENT_CHECK_NOBUILD([MINVERSION [, DIR]])
15 # This file is Copyright (c) 2014 Network Time Foundation
17 # Copying and distribution of this file, with or without modification, are
18 # permitted in any medium without royalty provided the copyright notice,
19 # author attribution and this notice are preserved. This file is offered
20 # as-is, without any warranty.
22 dnl NTP_ENABLE_LOCAL_LIBEVENT
24 dnl Provide only the --enable-local-libevent command-line option.
26 dnl Used standalone by top-level NTP configure.ac, which should have
27 dnl --enable-local-libevent in its --help output but which doesn't do
28 dnl anything differently based upon its presence or value.
30 dnl Also AC_REQUIRE'd by NTP_LIBEVENT_CHECK_NOBUILD.
31 AC_DEFUN([NTP_ENABLE_LOCAL_LIBEVENT], [
36 [--enable-local-libevent],
37 [Force using the supplied libevent tearoff code]
39 [ntp_use_local_libevent=$enableval],
40 [ntp_use_local_libevent=${ntp_use_local_libevent-detect}]
43 ]) dnl NTP_ENABLE_LOCAL_LIBEVENT
45 dnl NTP_LIBEVENT_CHECK_NOBUILD([MINVERSION [, DIR]]) -*- Autoconf -*-
47 dnl Look for libevent, which must be at least MINVERSION.
48 dnl DIR is the location of our "bundled" copy of libevent.
49 dnl If NOBUILD is provided as the 3rd argument, do all of the above,
50 dnl but DO NOT invoke DIR/configure if we are going to use our bundled
51 dnl version. This may be the case for nested packages.
53 dnl provides: --enable-local-libevent
57 dnl NTP_LIBEVENT_CHECK_NOBUILD([2.0.9], [sntp/libevent])
58 dnl NTP_LIBEVENT_CHECK
60 AC_DEFUN([NTP_LIBEVENT_CHECK_NOBUILD], [
61 AC_REQUIRE([NTP_PKG_CONFIG])dnl
62 AC_REQUIRE([NTP_ENABLE_LOCAL_LIBEVENT])dnl
64 ntp_libevent_min_version=m4_default([$1], [2.0.9])
65 ntp_libevent_tearoff=m4_default([$2], [libevent])
67 AC_SUBST([CFLAGS_LIBEVENT])
68 AC_SUBST([CPPFLAGS_LIBEVENT])
69 AC_SUBST([LDADD_LIBEVENT])
71 case "$ntp_use_local_libevent" in
74 *) # If we have (a good enough) pkg-config, see if it can find libevent
77 AC_MSG_CHECKING([if libevent $ntp_libevent_min_version or later is installed])
78 if $PKG_CONFIG --atleast-version=$ntp_libevent_min_version libevent
80 ntp_use_local_libevent=no
81 AC_MSG_NOTICE([Using the installed libevent])
82 CFLAGS_LIBEVENT=`$PKG_CONFIG --cflags libevent_pthreads`
83 CPPFLAGS_LIBEVENT=`$PKG_CONFIG --cflags-only-I libevent`
84 # HMS: I hope the following is accurate.
85 # We don't need -levent, we only need -levent_core.
86 # While we could grab only the -L stuff, there *might* be
87 # other flags there we want. Originally we just removed -levent
88 # but then somebody decided to install -levent-2.0
89 # LDADD_LIBEVENT=`$PKG_CONFIG --libs libevent | sed 's:-levent::'`
92 for i in `$PKG_CONFIG --libs libevent` `$PKG_CONFIG --cflags-only-other libevent_pthreads`
97 *) case "$LDADD_LIBEVENT" in
98 '') LDADD_LIBEVENT="$i" ;;
99 *) LDADD_LIBEVENT="$LDADD_LIBEVENT $i" ;;
104 case "$LIBISC_PTHREADS_NOTHREADS" in
106 LDADD_LIBEVENT="$LDADD_LIBEVENT -levent_pthreads"
108 LDADD_LIBEVENT="$LDADD_LIBEVENT -levent_core"
111 ntp_use_local_libevent=yes
112 # HMS: do we only need to do this if LIBISC_PTHREADS_NOTHREADS
114 CFLAGS_LIBEVENT=`$PKG_CONFIG --cflags libevent_pthreads`
119 ntp_use_local_libevent=yes
125 case "$ntp_use_local_libevent" in
127 AC_MSG_NOTICE([Using libevent tearoff])
128 CPPFLAGS_LIBEVENT="-I\$(top_builddir)/$ntp_libevent_tearoff/include -I\$(top_srcdir)/$ntp_libevent_tearoff/include"
129 case "$LIBISC_PTHREADS_NOTHREADS" in
131 LDADD_LIBEVENT="\$(top_builddir)/$ntp_libevent_tearoff/libevent_pthreads.la \$(top_builddir)/$ntp_libevent_tearoff/libevent_core.la"
134 LDADD_LIBEVENT="\$(top_builddir)/$ntp_libevent_tearoff/libevent_core.la"
139 dnl [cflags-libevent],
141 dnl [--enable-cflags-libevent=-pthread],
142 dnl [CFLAGS value to build with pthreads]
144 dnl [CFLAGS_LIBEVENT=$enableval],
145 dnl [# See above about LIBISC_PTHREADS_NOTHREADS
146 dnl case "$CFLAGS_LIBEVENT" in
147 dnl '') CFLAGS_LIBEVENT="-pthread" ;;
151 dnl AC_MSG_NOTICE([LIBISC_PTHREADS_NOTHREADS is <$LIBISC_PTHREADS_NOTHREADS>])
152 dnl AC_MSG_NOTICE([CFLAGS_LIBEVENT is <$CFLAGS_LIBEVENT>])
154 AM_CONDITIONAL([BUILD_LIBEVENT], [test "x$ntp_use_local_libevent" = "xyes"])
156 ]) dnl NTP_LIBEVENT_CHECK_NOBUILD
158 dnl NTP_LIBEVENT_CHECK([MINVERSION [, DIR]]) -*- Autoconf -*-
159 AC_DEFUN([NTP_LIBEVENT_CHECK], [
161 AC_SUBST([NTP_FORCE_LIBEVENT_DIST])
162 NTP_LIBEVENT_CHECK_NOBUILD([$1], [$2])
164 case "$ntp_libevent_tearoff" in
168 AC_MSG_ERROR([ntp_libevent.m4 dir must be libevent, not $ntp_libevent_tearoff])
172 case "$ntp_use_local_libevent" in
174 dnl ac_configure_args is undocumented but widely abused, as here,
175 dnl to modify the defaults of the libevent subpackage, by prefixing
176 dnl our changes to the child configure arguments already assembled.
177 dnl User-supplied contradictory choices should prevail thanks to
179 ac_configure_args=" --disable-openssl${ac_configure_args}"
180 ac_configure_args=" --disable-shared${ac_configure_args}"
181 ac_configure_args=" --disable-libevent-regress${ac_configure_args}"
182 ac_configure_args=" --disable-libevent-install${ac_configure_args}"
183 ac_configure_args=" --enable-silent-rules${ac_configure_args}"
184 ac_configure_args=" --enable-function-sections${ac_configure_args}"
185 ac_configure_args=" LEP_CFLAGS='${NTP_HARD_CFLAGS}'${ac_configure_args}"
186 ac_configure_args=" LEP_CPPFLAGS='${NTP_HARD_CPPFLAGS}'${ac_configure_args}"
187 ac_configure_args=" LEP_LDFLAGS='${NTP_HARD_LDFLAGS}'${ac_configure_args}"
188 AC_CONFIG_SUBDIRS([libevent])
191 NTP_FORCE_LIBEVENT_DIST=libevent
195 ]) dnl NTP_LIBEVENT_CHECK