configure.ac: add libunwind as an optional dependency

Signed-off-by: Balazs Scheidler <[email protected]>

cmake/Modules/FindUNWIND.cmake

@@ -0,0 +1,25 @@
+#############################################################################
+# Copyright (c) 2016 Balabit
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# As an additional exemption you are allowed to compile & link against the
+# OpenSSL libraries as published by the OpenSSL project. See the file
+# COPYING for details.
+#
+#############################################################################
+
+find_package(PkgConfig)
+pkg_check_modules(LIBUNWIND QUIET libunwind>=1.6.2)

cmake/syslog-ng-config.h.in

@@ -106,3 +106,4 @@
 #cmakedefine01 SYSLOG_NG_HAVE_SO_MEMINFO
 #cmakedefine01 SYSLOG_NG_ENABLE_AFSOCKET_MEMINFO_METRICS
 #cmakedefine01 SYSLOG_NG_HAVE_IV_WORK_POOL_SUBMIT_CONTINUATION
+#cmakedefine01 SYSLOG_NG_ENABLE_LIBUNWIND

configure.ac

@@ -1396,6 +1396,12 @@ AC_CHECK_DECLS([MONGOC_URI_SERVERSELECTIONTIMEOUTMS], [], [], [[#include <mongoc
 CPPFLAGS="$CPPFLAGS_SAVE"
 fi
 
+dnl ***************************************************************************
+dnl libunwind headers/libraries
+dnl ***************************************************************************
+
+PKG_CHECK_MODULES(LIBUNWIND, libunwind >= 1.6.2, enable_libunwind="yes", enable_libunwind="no")
+
 dnl ***************************************************************************
 dnl libesmtp headers/libraries
 dnl ***************************************************************************
@@ -2097,7 +2103,7 @@ fi
 python_moduledir="$moduledir"/python
 python_sysconf_moduledir="${sysconfdir}/python"
 
-CPPFLAGS="$CPPFLAGS $GLIB_CFLAGS $EVTLOG_CFLAGS $PCRE2_CFLAGS $OPENSSL_CFLAGS $LIBNET_CFLAGS $LIBDBI_CFLAGS $IVYKIS_CFLAGS $JSON_CFLAGS $LIBCAP_CFLAGS -D_GNU_SOURCE -D_DEFAULT_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+CPPFLAGS="$CPPFLAGS $GLIB_CFLAGS $EVTLOG_CFLAGS $PCRE2_CFLAGS $OPENSSL_CFLAGS $LIBNET_CFLAGS $LIBUNWIND_CFLAGS $LIBDBI_CFLAGS $IVYKIS_CFLAGS $JSON_CFLAGS $LIBCAP_CFLAGS -D_GNU_SOURCE -D_DEFAULT_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 
 ########################################################
 ## NOTES: on how syslog-ng is linked
@@ -2145,7 +2151,7 @@ fi
 MODULE_DEPS_LIBS="\$(top_builddir)/lib/libsyslog-ng.la"
 
 if test "x$linking_mode" = "xdynamic"; then
-	SYSLOGNG_DEPS_LIBS="$LIBS $BASE_LIBS $GLIB_LIBS $EVTLOG_LIBS $SECRETSTORAGE_LIBS $RESOLV_LIBS $LIBCAP_LIBS $PCRE2_LIBS $REGEX_LIBS $DL_LIBS"
+	SYSLOGNG_DEPS_LIBS="$LIBS $BASE_LIBS $GLIB_LIBS $EVTLOG_LIBS $SECRETSTORAGE_LIBS $RESOLV_LIBS $LIBCAP_LIBS $PCRE2_LIBS $REGEX_LIBS $DL_LIBS $LIBUNWIND_LIBS"
 
 	if test "x$with_ivykis" = "xinternal"; then
 		# when using the internal ivykis, we're linking it statically into libsyslog-ng.so
@@ -2164,7 +2170,7 @@ if test "x$linking_mode" = "xdynamic"; then
 	# syslog-ng binary is linked with the default link command (e.g. libtool)
 	SYSLOGNG_LINK='$(LINK)'
 else
-	SYSLOGNG_DEPS_LIBS="$LIBS $BASE_LIBS $RESOLV_LIBS $EVTLOG_NO_LIBTOOL_LIBS $SECRETSTORAGE_NO_LIBTOOL_LIBS $LD_START_STATIC -Wl,${WHOLE_ARCHIVE_OPT} $GLIB_LIBS $PCRE2_LIBS $REGEX_LIBS  -Wl,${NO_WHOLE_ARCHIVE_OPT} $IVYKIS_NO_LIBTOOL_LIBS $LD_END_STATIC $LIBCAP_LIBS $DL_LIBS"
+	SYSLOGNG_DEPS_LIBS="$LIBS $BASE_LIBS $RESOLV_LIBS $EVTLOG_NO_LIBTOOL_LIBS $SECRETSTORAGE_NO_LIBTOOL_LIBS $LD_START_STATIC -Wl,${WHOLE_ARCHIVE_OPT} $GLIB_LIBS $PCRE2_LIBS $REGEX_LIBS  -Wl,${NO_WHOLE_ARCHIVE_OPT} $IVYKIS_NO_LIBTOOL_LIBS $LD_END_STATIC $LIBCAP_LIBS $DL_LIBS $LIBUNWIND_LIBS"
 	TOOL_DEPS_LIBS="$LIBS $BASE_LIBS $GLIB_LIBS $EVTLOG_LIBS $SECRETSTORAGE_LIBS $RESOLV_LIBS $LIBCAP_LIBS $PCRE2_LIBS $REGEX_LIBS $IVYKIS_LIBS $DL_LIBS"
 	CORE_DEPS_LIBS=""
 
@@ -2247,6 +2253,7 @@ AC_DEFINE_UNQUOTED(ENABLE_ENV_WRAPPER, `enable_value $enable_env_wrapper`, [Enab
 AC_DEFINE_UNQUOTED(ENABLE_SYSTEMD, `enable_value $enable_systemd`, [Enable systemd support])
 AC_DEFINE_UNQUOTED(ENABLE_KAFKA, `enable_value $enable_kafka`, [Enable kafka support])
 AC_DEFINE_UNQUOTED(ENABLE_CPP, `enable_value $enable_cpp`, [Enable C++ support])
+AC_DEFINE_UNQUOTED(ENABLE_LIBUNWIND, `enable_value $enable_libunwind`, [Enable stackdump using libunwind])
 AC_DEFINE_UNQUOTED(SYSTEMD_JOURNAL_MODE, `journald_mode`, [Systemd-journal support mode])
 AC_DEFINE_UNQUOTED(HAVE_INOTIFY, `enable_value $ac_cv_func_inotify_init`, [Have inotify])
 AC_DEFINE_UNQUOTED(USE_CONST_IVYKIS_MOCK, `enable_value $IVYKIS_VERSION_UPDATED`, [ivykis version is greater than $IVYKIS_UPDATED_VERSION])
@@ -2414,6 +2421,7 @@ echo "  Env wrapper support         : ${enable_env_wrapper:=no}"
 echo "  systemd support             : ${enable_systemd:=no} (unit dir: ${systemdsystemunitdir:=none})"
 echo "  systemd-journal support     : ${with_systemd_journal:=no}"
 echo "  JSON support                : $with_jsonc"
+echo "  unwind support              : ${enable_libunwind:=no}"
 echo " Build options:"
 echo "  Generate manual pages       : ${enable_manpages:=no}"
 echo "  Install manual pages        : ${enable_manpages_install:=no}"