Add yaml-cpp-config.cmake and yaml-cpp-config-version.cmake files for importing yaml-cpp into external projects (through find_package).

CMakeLists.txt

@@ -302,6 +302,18 @@ install(
 	FILES_MATCHING PATTERN "*.h"
 )
 
+export(
+    TARGETS yaml-cpp
+    FILE "${PROJECT_BINARY_DIR}/yaml-cpp-targets.cmake")
+export(PACKAGE yaml-cpp)
+set(EXPORT_TARGETS yaml-cpp CACHE INTERNAL "export targets")
+
+set(CONFIG_INCLUDE_DIRS "${YAML_CPP_SOURCE_DIR}/include")
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp-config.cmake.in
+	"${PROJECT_BINARY_DIR}/yaml-cpp-config.cmake" @ONLY)
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/yaml-cpp-config-version.cmake.in
+	"${PROJECT_BINARY_DIR}/yaml-cpp-config-version.cmake" @ONLY)
+
 if(UNIX)
 	set(PC_FILE ${CMAKE_BINARY_DIR}/yaml-cpp.pc)
 	configure_file("yaml-cpp.pc.cmake" ${PC_FILE} @ONLY)

yaml-cpp-config-version.cmake.in

@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@YAML_CPP_VERSION@")
+
+# 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()

yaml-cpp-config.cmake.in

@@ -0,0 +1,14 @@
+# - Config file for the yaml-cpp package
+# It defines the following variables
+#  YAML_CPP_INCLUDE_DIR - include directory
+#  YAML_CPP_LIBRARIES    - libraries to link against
+
+# Compute paths
+get_filename_component(YAML_CPP_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+set(YAML_CPP_INCLUDE_DIR "@CONFIG_INCLUDE_DIRS@")
+
+# Our library dependencies (contains definitions for IMPORTED targets)
+include("${YAML_CPP_CMAKE_DIR}/yaml-cpp-targets.cmake")
+
+# These are IMPORTED targets created by yaml-cpp-targets.cmake
+set(YAML_CPP_LIBRARIES "@EXPORT_TARGETS@")