Export build tree package

CMakeLists.txt

@@ -144,9 +144,8 @@ include_directories("${PROJECT_SOURCE_DIR}/test/external")
 add_subdirectory(glm)
 add_subdirectory(test)
 
-set(GLM_INSTALL_CONFIG_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/glm")
-set(GLM_INCLUDE_DIRS ${CMAKE_INSTALL_FULL_INCLUDEDIR})
-install(DIRECTORY glm DESTINATION ${GLM_INCLUDE_DIRS})
+set(GLM_INSTALL_CONFIGDIR "${CMAKE_INSTALL_LIBDIR}/cmake/glm")
+install(DIRECTORY glm DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
 include(CMakePackageConfigHelpers)
 write_basic_package_version_file(
@@ -155,32 +154,48 @@ write_basic_package_version_file(
     COMPATIBILITY AnyNewerVersion
 )
 
-configure_file(cmake/glmConfig.cmake.in
-    "${CMAKE_CURRENT_BINARY_DIR}/glmConfig.cmake"
-    @ONLY
+# build tree package config
+configure_package_config_file(
+    cmake/glmConfig.cmake.in
+    glmConfig.cmake
+    INSTALL_DESTINATION ${CMAKE_CURRENT_BINARY_DIR}
+    PATH_VARS CMAKE_INSTALL_INCLUDEDIR
+    NO_CHECK_REQUIRED_COMPONENTS_MACRO
+)
+
+# install tree package config
+configure_package_config_file(
+    cmake/glmConfig.cmake.in
+    ${GLM_INSTALL_CONFIGDIR}/glmConfig.cmake
+    INSTALL_DESTINATION ${GLM_INSTALL_CONFIGDIR}
+    PATH_VARS CMAKE_INSTALL_INCLUDEDIR
+    NO_CHECK_REQUIRED_COMPONENTS_MACRO
 )
 
 install(
     FILES 
         "${CMAKE_CURRENT_BINARY_DIR}/glmConfig.cmake"
         "${CMAKE_CURRENT_BINARY_DIR}/glmVersion.cmake"
-    DESTINATION ${GLM_INSTALL_CONFIG_DIR}
+    DESTINATION ${GLM_INSTALL_CONFIGDIR}
 )
 
 if (NOT CMAKE_VERSION VERSION_LESS "2.8.12")
     add_library(glm INTERFACE)
     target_include_directories(glm INTERFACE
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
-        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
     )
     install(TARGETS glm EXPORT glmTargets)
 
     export(
         EXPORT glmTargets
         FILE "${CMAKE_CURRENT_BINARY_DIR}/glmTargets.cmake"
     )
+
     install(
         EXPORT glmTargets FILE glmTargets.cmake
-        DESTINATION ${GLM_INSTALL_CONFIG_DIR}
+        DESTINATION ${GLM_INSTALL_CONFIGDIR}
     )
 endif()
+
+export(PACKAGE glm)

cmake/glmConfig.cmake.in

@@ -1,4 +1,8 @@
-set_and_check(GLM_INCLUDE_DIRS "@GLM_INCLUDE_DIRS@")
+set(GLM_VERSION "@GLM_VERSION@")
+
+@PACKAGE_INIT@
+
+set_and_check(GLM_INCLUDE_DIRS "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
 
 if (NOT CMAKE_VERSION VERSION_LESS "2.8.12")
     include("${CMAKE_CURRENT_LIST_DIR}/glmTargets.cmake")