From 6c18342a1404bc5b960b66baf68dee4d0cce01e4 Mon Sep 17 00:00:00 2001
From: Wouter Nuyts <wouternuyts@gmail.com>
Date: Wed, 22 Jul 2020 21:24:10 +0200
Subject: [PATCH] Add package configuration file to CPP version.

Resolves #901.
---
 CMakeLists.txt                   | 50 ++++++++++++++++++++++++++++++--
 cmake/msgpackcxx-config.cmake.in | 19 ++++++++++++
 2 files changed, 66 insertions(+), 3 deletions(-)
 create mode 100644 cmake/msgpackcxx-config.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f7d761aa..bc7490734 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ IF ((CMAKE_VERSION VERSION_GREATER 3.1) OR
     CMAKE_POLICY(SET CMP0054 NEW)
 ENDIF ()
 
-PROJECT (msgpack CXX)
+PROJECT (msgpackcxx CXX)
 
 FILE (READ ${CMAKE_CURRENT_SOURCE_DIR}/include/msgpack/version_master.hpp contents)
 STRING (REGEX MATCH "#define MSGPACK_VERSION_MAJOR *([0-9a-zA-Z_]*)" NULL_OUT ${contents})
@@ -129,13 +129,19 @@ int main(int argc, char * argv[])
 
 INCLUDE (Files.cmake)
 
-ADD_LIBRARY (msgpackcxx INTERFACE)
+ADD_LIBRARY (${PROJECT_NAME} INTERFACE)
 
 TARGET_INCLUDE_DIRECTORIES (msgpackcxx
     INTERFACE
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
-        $<INSTALL_INTERFACE:include>
+		$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+TARGET_LINK_LIBRARIES(${PROJECT_NAME}
+	INTERFACE
+		Boost::system
+		ZLIB::ZLIB
 )
 
 # enable regression testing
@@ -185,6 +191,44 @@ IF (MSGPACK_BUILD_EXAMPLES)
     ADD_SUBDIRECTORY (example)
 ENDIF ()
 
+INCLUDE(GNUInstallDirs)
+SET (CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}/cmake")
+
+SET(CONFIG_FILENAME "${PROJECT_NAME}-config.cmake")
+SET(CONFIG_VERSION_FILENAME "${PROJECT_NAME}-config-version.cmake")
+
+INSTALL (
+	TARGETS ${PROJECT_NAME}
+	EXPORT ${PROJECT_NAME}_Targets
+)
+
+INCLUDE(CMakePackageConfigHelpers)
+WRITE_BASIC_PACKAGE_VERSION_FILE (
+	"${CONFIG_VERSION_FILENAME}"
+	VERSION ${VERSION}
+	COMPATIBILITY SameMajorVersion
+)
+
+CONFIGURE_PACKAGE_CONFIG_FILE ("${CMAKE_CURRENT_SOURCE_DIR}/cmake/${CONFIG_FILENAME}.in"
+	"${CONFIG_FILENAME}"
+	INSTALL_DESTINATION "${CMAKE_INSTALL_CMAKEDIR}"
+)
+
+INSTALL (EXPORT ${PROJECT_NAME}_Targets
+	FILE
+		"${PROJECT_NAME}-targets.cmake"
+	DESTINATION
+		"${CMAKE_INSTALL_CMAKEDIR}"
+)
+
+INSTALL(
+	FILES
+		"${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_FILENAME}"
+		"${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_VERSION_FILENAME}"
+	DESTINATION
+		"${CMAKE_INSTALL_CMAKEDIR}"
+)
+
 FOREACH (file ${msgpackc_HEADERS})
     GET_FILENAME_COMPONENT (dir ${file} PATH)
     INSTALL (FILES ${file} DESTINATION ${CMAKE_INSTALL_PREFIX}/${dir})
diff --git a/cmake/msgpackcxx-config.cmake.in b/cmake/msgpackcxx-config.cmake.in
new file mode 100644
index 000000000..a9e2f5d7f
--- /dev/null
+++ b/cmake/msgpackcxx-config.cmake.in
@@ -0,0 +1,19 @@
+#.rst:
+# msgpack
+# -------
+#
+# The following import targets are created
+#
+# ::
+#
+#   msgpackcppcxx
+#
+
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+find_dependency(ZLIB)
+find_dependency(Boost COMPONENTS system)
+
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake")
+check_required_components(msgpackcxx)