Reading GLM version in CMake using REGEX on GLM header

CMakeLists.txt

@@ -1,8 +1,21 @@
 cmake_minimum_required(VERSION 3.2 FATAL_ERROR)
 cmake_policy(VERSION 3.2)
 
-set(GLM_VERSION "0.9.9")
+
+file(READ "glm/detail/setup.hpp" GLM_SETUP_FILE)
+string(REGEX MATCH "#define[ ]+GLM_VERSION_MAJOR[ ]+([0-9]+)" _ ${GLM_SETUP_FILE})
+set(GLM_VERSION_MAJOR "${CMAKE_MATCH_1}")
+string(REGEX MATCH "#define[ ]+GLM_VERSION_MINOR[ ]+([0-9]+)" _ ${GLM_SETUP_FILE})
+set(GLM_VERSION_MINOR "${CMAKE_MATCH_1}")
+string(REGEX MATCH "#define[ ]+GLM_VERSION_PATCH[ ]+([0-9]+)" _ ${GLM_SETUP_FILE})
+set(GLM_VERSION_PATCH "${CMAKE_MATCH_1}")
+string(REGEX MATCH "#define[ ]+GLM_VERSION_REVISION[ ]+([0-9]+)" _ ${GLM_SETUP_FILE})
+set(GLM_VERSION_REVISION "${CMAKE_MATCH_1}")
+
+set(GLM_VERSION ${GLM_VERSION_MAJOR}.${GLM_VERSION_MINOR}.${GLM_VERSION_PATCH}.${GLM_VERSION_REVISION})
 project(glm VERSION ${GLM_VERSION} LANGUAGES CXX)
+message(STATUS "GLM: Version " ${GLM_VERSION})
+
 enable_testing()
 
 add_subdirectory(glm)

glm/detail/setup.hpp

@@ -3,14 +3,14 @@
 #include <cassert>
 #include <cstddef>
 
-#define GLM_VERSION_MAJOR			0
-#define GLM_VERSION_MINOR			9
-#define GLM_VERSION_PATCH			9
-#define GLM_VERSION_REVISION		8
-#define GLM_VERSION					998
-#define GLM_VERSION_MESSAGE			"GLM: version 0.9.9.8"
-
-#define GLM_SETUP_INCLUDED			GLM_VERSION
+#define GLM_VERSION_MAJOR 0
+#define GLM_VERSION_MINOR 9
+#define GLM_VERSION_PATCH 9
+#define GLM_VERSION_REVISION 8
+#define GLM_VERSION 998
+#define GLM_VERSION_MESSAGE "GLM: version 0.9.9.8"
+
+#define GLM_SETUP_INCLUDED GLM_VERSION
 
 ///////////////////////////////////////////////////////////////////////////////////
 // Active states