From 2e2eda07cfb73d2a71abd9b9e990f853ccce6e6c Mon Sep 17 00:00:00 2001
From: Ralf Habacker <ralf.habacker@freenet.de>
Date: Tue, 7 Feb 2017 12:03:33 +0100
Subject: Add find package config support.

---
 cmake/CMakeLists.txt             | 35 +++++++++++++++++++++++++++++++++--
 cmake/DBusConfig.cmake.in        | 18 ++++++++++++++++++
 cmake/DBusConfigVersion.cmake.in | 11 +++++++++++
 3 files changed, 62 insertions(+), 2 deletions(-)
 create mode 100644 cmake/DBusConfig.cmake.in
 create mode 100644 cmake/DBusConfigVersion.cmake.in

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 2c397d29..2d433061 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -97,9 +97,9 @@ set(DBUS_DATADIR             ${EXPANDED_DATADIR})
 SET(BUILD_SHARED_LIBS ON)
 
 if(WIN32)
-    set(INSTALL_TARGETS_DEFAULT_ARGS  RUNTIME DESTINATION "bin" LIBRARY DESTINATION "lib" ARCHIVE DESTINATION "lib")
+    set(INSTALL_TARGETS_DEFAULT_ARGS EXPORT DBusTargets RUNTIME DESTINATION "bin" LIBRARY DESTINATION "lib" ARCHIVE DESTINATION "lib")
 else()
-    set(INSTALL_TARGETS_DEFAULT_ARGS  RUNTIME DESTINATION "${EXPANDED_LIBDIR}" LIBRARY DESTINATION "${EXPANDED_LIBDIR}" ARCHIVE DESTINATION "${EXPANDED_LIBDIR}")
+    set(INSTALL_TARGETS_DEFAULT_ARGS EXPORT DBusTargets RUNTIME DESTINATION "${EXPANDED_LIBDIR}" LIBRARY DESTINATION "${EXPANDED_LIBDIR}" ARCHIVE DESTINATION "${EXPANDED_LIBDIR}")
 endif()
 
 if (CYGWIN)
@@ -635,3 +635,34 @@ add_custom_target(help-options
     cmake -LH 
     WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
 )
+
+#
+# create cmake find_package support
+#
+if(WIN32 AND NOT CYGWIN)
+  set(DEF_INSTALL_CMAKE_DIR CMake)
+else()
+  set(DEF_INSTALL_CMAKE_DIR lib/CMake/DBus)
+endif()
+set(INSTALL_CMAKE_DIR ${DEF_INSTALL_CMAKE_DIR} CACHE PATH "Installation directory for CMake files")
+
+# Make relative paths absolute (needed later on)
+foreach(p LIB BIN INCLUDE CMAKE)
+  set(var INSTALL_${p}_DIR)
+  if(NOT IS_ABSOLUTE "${${var}}")
+    set(${var} "${CMAKE_INSTALL_PREFIX}/${${var}}")
+  endif()
+endforeach()
+
+file(RELATIVE_PATH REL_INCLUDE_DIR "${INSTALL_CMAKE_DIR}" "${INSTALL_INCLUDE_DIR}")
+set(CONF_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}")
+configure_file(DBusConfig.cmake.in "${CMAKE_BINARY_DIR}/DBusConfig.cmake" @ONLY)
+set(CONF_INCLUDE_DIRS "\${FOOBAR_CMAKE_DIR}/${REL_INCLUDE_DIR}")
+configure_file(DBusConfig.cmake.in "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/DBusConfig.cmake" @ONLY)
+configure_file(DBusConfigVersion.cmake.in "${CMAKE_BINARY_DIR}/DBusConfigVersion.cmake" @ONLY)
+install(FILES
+    "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/DBusConfig.cmake"
+    "${CMAKE_BINARY_DIR}/DBusConfigVersion.cmake"
+    DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev
+)
+install(EXPORT DBusTargets DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev)
diff --git a/cmake/DBusConfig.cmake.in b/cmake/DBusConfig.cmake.in
new file mode 100644
index 00000000..23428db7
--- /dev/null
+++ b/cmake/DBusConfig.cmake.in
@@ -0,0 +1,18 @@
+# - Config file for the FooBar package
+# It defines the following variables
+#  DBUS_INCLUDE_DIRS - include directories for FooBar
+#  DBUS_LIBRARIES    - libraries to link against
+#  DBUS_EXECUTABLE   - the bar executable
+
+# Compute paths
+get_filename_component(DBUS1_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+set(DBUS_INCLUDE_DIRS "@CONF_INCLUDE_DIRS@")
+
+# Our library dependencies (contains definitions for IMPORTED targets)
+if(NOT TARGET dbus AND NOT CMAKE_BINARY_DIR)
+  include("${DBUS_CMAKE_DIR}/DBusTargets.cmake")
+endif()
+
+# These are IMPORTED targets created by FooBarTargets.cmake
+set(DBUS_LIBRARIES dbus-1)
+set(DBUS_EXECUTABLE dbus-daemon)
diff --git a/cmake/DBusConfigVersion.cmake.in b/cmake/DBusConfigVersion.cmake.in
new file mode 100644
index 00000000..8c7b6eaf
--- /dev/null
+++ b/cmake/DBusConfigVersion.cmake.in
@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@DBUS_VERSION_STRING@")
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()
-- 
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