Move to the modern CMake project version option

This replaces the manual ad-hoc version variables we have used since
CMake 2.x (and GLFW 2.x lite).

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.0)
 
-project(GLFW C)
+project(GLFW VERSION 3.4.0 LANGUAGES C)
 
 set(CMAKE_LEGACY_CYGWIN_WIN32 OFF)
 
@@ -8,13 +8,6 @@ if (POLICY CMP0054)
     cmake_policy(SET CMP0054 NEW)
 endif()
 
-set(GLFW_VERSION_MAJOR "3")
-set(GLFW_VERSION_MINOR "4")
-set(GLFW_VERSION_PATCH "0")
-set(GLFW_VERSION_EXTRA "")
-set(GLFW_VERSION "${GLFW_VERSION_MAJOR}.${GLFW_VERSION_MINOR}")
-set(GLFW_VERSION_FULL "${GLFW_VERSION}.${GLFW_VERSION_PATCH}${GLFW_VERSION_EXTRA}")
-
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
 option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
@@ -328,7 +321,7 @@ configure_package_config_file(src/glfw3Config.cmake.in
                               NO_CHECK_REQUIRED_COMPONENTS_MACRO)
 
 write_basic_package_version_file(src/glfw3ConfigVersion.cmake
-                                 VERSION ${GLFW_VERSION_FULL}
+                                 VERSION ${GLFW_VERSION}
                                  COMPATIBILITY SameMajorVersion)
 
 configure_file(src/glfw_config.h.in src/glfw_config.h @ONLY)

docs/Doxyfile.in

@@ -32,7 +32,7 @@ PROJECT_NAME           = "GLFW"
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = @GLFW_VERSION_FULL@
+PROJECT_NUMBER         = @GLFW_VERSION@
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer

examples/CMakeLists.txt

@@ -70,7 +70,7 @@ if (APPLE)
     set_target_properties(${WINDOWS_BINARIES} PROPERTIES
                           RESOURCE glfw.icns
                           MACOSX_BUNDLE_SHORT_VERSION_STRING ${GLFW_VERSION}
-                          MACOSX_BUNDLE_LONG_VERSION_STRING ${GLFW_VERSION_FULL}
+                          MACOSX_BUNDLE_LONG_VERSION_STRING ${GLFW_VERSION}
                           MACOSX_BUNDLE_ICON_FILE glfw.icns
                           MACOSX_BUNDLE_INFO_PLIST "${GLFW_SOURCE_DIR}/CMake/MacOSXBundleInfo.plist.in")
 endif()

src/CMakeLists.txt

@@ -95,7 +95,7 @@ endif()
 add_library(glfw ${glfw_SOURCES} ${glfw_HEADERS})
 set_target_properties(glfw PROPERTIES
                       OUTPUT_NAME ${GLFW_LIB_NAME}
-                      VERSION ${GLFW_VERSION}
+                      VERSION ${GLFW_VERSION_MAJOR}.${GLFW_VERSION_MINOR}
                       SOVERSION ${GLFW_VERSION_MAJOR}
                       POSITION_INDEPENDENT_CODE ON
                       FOLDER "GLFW3")

src/glfw3.pc.in

@@ -5,7 +5,7 @@ libdir=@CMAKE_INSTALL_FULL_LIBDIR@
 
 Name: GLFW
 Description: A multi-platform library for OpenGL, window and input
-Version: @GLFW_VERSION_FULL@
+Version: @GLFW_VERSION@
 URL: https://www.glfw.org/
 Requires.private: @GLFW_PKG_DEPS@
 Libs: -L${libdir} -l@GLFW_LIB_NAME@

tests/CMakeLists.txt

@@ -78,7 +78,7 @@ if (APPLE)
 
     set_target_properties(${WINDOWS_BINARIES} ${CONSOLE_BINARIES} PROPERTIES
                           MACOSX_BUNDLE_SHORT_VERSION_STRING ${GLFW_VERSION}
-                          MACOSX_BUNDLE_LONG_VERSION_STRING ${GLFW_VERSION_FULL}
+                          MACOSX_BUNDLE_LONG_VERSION_STRING ${GLFW_VERSION}
                           MACOSX_BUNDLE_INFO_PLIST "${GLFW_SOURCE_DIR}/CMake/MacOSXBundleInfo.plist.in")
 endif()