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Diffstat (limited to 'sntp/m4/ntp_libevent.m4')
| -rw-r--r-- | sntp/m4/ntp_libevent.m4 | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/sntp/m4/ntp_libevent.m4 b/sntp/m4/ntp_libevent.m4 new file mode 100644 index 0000000..5f81ae9 --- /dev/null +++ b/sntp/m4/ntp_libevent.m4 @@ -0,0 +1,150 @@ +dnl NTP_ENABLE_LOCAL_LIBEVENT -*- Autoconf -*- +dnl +dnl Provide only the --enable-local-libevent command-line option. +dnl +dnl Used standalone by top-level NTP configure.ac, which should have +dnl --enable-local-libevent in its --help output but which doesn't do +dnl anything differently based upon its presence or value. +dnl +dnl Also AC_REQUIRE'd by NTP_LIBEVENT_CHECK_NOBUILD. +AC_DEFUN([NTP_ENABLE_LOCAL_LIBEVENT], [ + +AC_ARG_ENABLE( + [local-libevent], + [AC_HELP_STRING( + [--enable-local-libevent], + [Force using the supplied libevent tearoff code] + )], + [ntp_use_local_libevent=$enableval], + [ntp_use_local_libevent=${ntp_use_local_libevent-detect}] +) + +]) dnl NTP_ENABLE_LOCAL_LIBEVENT + +dnl NTP_LIBEVENT_CHECK_NOBUILD([MINVERSION [, DIR]]) -*- Autoconf -*- +dnl +dnl Look for libevent, which must be at least MINVERSION. +dnl DIR is the location of our "bundled" copy of libevent. +dnl If NOBUILD is provided as the 3rd argument, do all of the above, +dnl but DO NOT invoke DIR/configure if we are going to use our bundled +dnl version. This may be the case for nested packages. +dnl +dnl provide --enable-local-libevent . +dnl +dnl Examples: +dnl +dnl NTP_LIBEVENT_CHECK_NOBUILD([2.0.9], [sntp/libevent]) +dnl NTP_LIBEVENT_CHECK +dnl +AC_DEFUN([NTP_LIBEVENT_CHECK_NOBUILD], [ +AC_REQUIRE([NTP_PKG_CONFIG])dnl +AC_REQUIRE([NTP_ENABLE_LOCAL_LIBEVENT])dnl + +ntp_libevent_min_version=m4_default([$1], [2.0.9]) +ntp_libevent_tearoff=m4_default([$2], [libevent]) + +AC_SUBST([CPPFLAGS_LIBEVENT]) +AC_SUBST([LDADD_LIBEVENT]) + +case "$ntp_use_local_libevent" in + yes) + ;; + *) # If we have (a good enough) pkg-config, see if it can find libevent + case "$PKG_CONFIG" in + /*) + AC_MSG_CHECKING([if libevent $ntp_libevent_min_version or later is installed]) + if $PKG_CONFIG --atleast-version=$ntp_libevent_min_version libevent + then + ntp_use_local_libevent=no + AC_MSG_NOTICE([Using the installed libevent]) + CPPFLAGS_LIBEVENT=`$PKG_CONFIG --cflags-only-I libevent` + # HMS: I hope the following is accurate. + # We don't need -levent, we only need -levent_core. + # While we could grab only the -L stuff, there *might* be + # other flags there we want. Originally we just removed -levent + # but then somebody decided to install -levent-2.0 + # LDADD_LIBEVENT=`$PKG_CONFIG --libs libevent | sed 's:-levent::'` + # So now we dance... + LDADD_LIBEVENT= + for i in `$PKG_CONFIG --libs libevent` + do + case "$i" in + -levent*) ;; + *) case "$LDADD_LIBEVENT" in + '') LDADD_LIBEVENT="$i" ;; + *) LDADD_LIBEVENT="$LDADD_LIBEVENT $i" ;; + esac + ;; + esac + done + case "$LIBISC_PTHREADS_NOTHREADS" in + pthreads) + LDADD_LIBEVENT="$LDADD_LIBEVENT -levent_pthreads" + esac + LDADD_LIBEVENT="$LDADD_LIBEVENT -levent_core" + AC_MSG_RESULT([yes]) + else + ntp_use_local_libevent=yes + AC_MSG_RESULT([no]) + fi + ;; + *) + ntp_use_local_libevent=yes + ;; + esac + ;; +esac + +case "$ntp_use_local_libevent" in + yes) + AC_MSG_NOTICE([Using libevent tearoff]) + CPPFLAGS_LIBEVENT="-I\$(top_builddir)/$ntp_libevent_tearoff/include -I\$(top_srcdir)/$ntp_libevent_tearoff/include" + case "$LIBISC_PTHREADS_NOTHREADS" in + pthreads) + LDADD_LIBEVENT="\$(top_builddir)/$ntp_libevent_tearoff/libevent_pthreads.la \$(top_builddir)/$ntp_libevent_tearoff/libevent_core.la" + ;; + *) + LDADD_LIBEVENT="\$(top_builddir)/$ntp_libevent_tearoff/libevent_core.la" + esac +esac + +AM_CONDITIONAL([BUILD_LIBEVENT], [test "x$ntp_use_local_libevent" = "xyes"]) + +]) dnl NTP_LIBEVENT_CHECK_NOBUILD + +dnl NTP_LIBEVENT_CHECK([MINVERSION [, DIR]]) -*- Autoconf -*- +AC_DEFUN([NTP_LIBEVENT_CHECK], [ + +AC_SUBST([NTP_FORCE_LIBEVENT_DIST]) +NTP_LIBEVENT_CHECK_NOBUILD([$1], [$2]) + +case "$ntp_libevent_tearoff" in + libevent) + ;; + *) + AC_MSG_ERROR([ntp_libevent.m4 dir must be libevent, not $ntp_libevent_tearoff]) + ;; +esac + +case "$ntp_use_local_libevent" in + yes) + dnl ac_configure_args is undocumented but widely abused, as here, + dnl to modify the defaults of the libevent subpackage, by prefixing + dnl our changes to the child configure arguments already assembled. + dnl User-supplied contradictory choices should prevail thanks to + dnl "last wins". + ac_configure_args=" --disable-openssl${ac_configure_args}" + ac_configure_args=" --disable-shared${ac_configure_args}" + ac_configure_args=" --disable-libevent-regress${ac_configure_args}" + ac_configure_args=" --disable-libevent-install${ac_configure_args}" + ac_configure_args=" --enable-silent-rules${ac_configure_args}" + ac_configure_args=" --enable-function-sections${ac_configure_args}" + AC_CONFIG_SUBDIRS([libevent]) + ;; + *) + NTP_FORCE_LIBEVENT_DIST=libevent + ;; +esac + +]) dnl NTP_LIBEVENT_CHECK + |