cmake: Add libunwind detection

Signed-off-by: Hofi <[email protected]>

CMakeLists.txt

@@ -346,6 +346,19 @@ endif()
 
 set(SYSLOG_NG_ENABLE_LINUX_CAPS ${PC_LIBCAP_FOUND})
 
+find_package (LIBUNWIND)
+if (ENABLE_LIBUNWIND)
+  if (NOT LIBUNWIND_FOUND)
+    message (FATAL_ERROR "ENABLE_LIBUNWIND is defined, but the libunwind library could not be found.")
+  endif ()
+endif ()
+if (LIBUNWIND_FOUND)
+  set (CMAKE_REQUIRED_INCLUDES ${LIBUNWIND_INCLUDE_DIR})
+  set (CMAKE_REQUIRED_LIBRARIES ${LIBUNWIND_LIBRARY})
+endif ()
+option (ENABLE_LIBUNWIND "Enable stackdump using libunwind" ${LIBUNWIND_FOUND})
+set (SYSLOG_NG_ENABLE_STACKDUMP ${ENABLE_LIBUNWIND})
+
 if (WITH_GETTEXT)
     set(CMAKE_PREFIX_PATH ${WITH_GETTEXT})
     find_package(Gettext REQUIRED QUIET)

cmake/Modules/FindLIBUNWIND.cmake

@@ -0,0 +1,27 @@
+# ############################################################################
+# Copyright (c) 2025 One Identity LLC.
+#
+# 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.
+#
+# ############################################################################
+
+include (LibFindMacros)
+
+libfind_pkg_detect (LIBUNWIND libunwind FIND_PATH libunwind.h FIND_LIBRARY unwind)
+libfind_process (LIBUNWIND)