CMake: read version from configure.ac

Instead of using hardcoded major/minor version in config-msvc.h,
use the values from configure.ac.

Signed-off-by: Lev Stipakov <lev@openvpn.net>

CMakeLists.txt

@@ -25,8 +25,6 @@ add_executable(${PROJECT_NAME} WIN32
     viewlog.c
     res/openvpn-gui-res.rc)
 
-configure_file(config-msvc.h config.h COPYONLY)
-
 find_package(OpenSSL REQUIRED)
 target_link_libraries(${PROJECT_NAME} OpenSSL::SSL
     Wtsapi32.lib
@@ -48,6 +46,17 @@ target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /MANIFEST:NO")
 set(CMAKE_RC_FLAGS "/D \"HAVE_CONFIG_H\" /D \"_MSC_VER\"")
 
+function(get_version_from_configure regex_arg ret)
+    file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/configure.ac" VERSION_STR REGEX ${regex_arg})
+    string(REGEX MATCH ${regex_arg} VERSION_STR "${VERSION_STR}")
+    set("${ret}" ${CMAKE_MATCH_1} PARENT_SCOPE)
+endfunction()
+
+get_version_from_configure("_GUI_VERSION_MAJOR\\], \\[([0-9]+)\\]" GUI_VERSION_MAJOR)
+get_version_from_configure("_GUI_VERSION_MINOR\\], \\[([0-9]+)\\]" GUI_VERSION_MINOR)
+
+configure_file(config-msvc.h.in config.h)
+
 target_compile_definitions(${PROJECT_NAME} PRIVATE
     _UNICODE
     UNICODE

config-msvc.h.in

@@ -22,7 +22,7 @@
 #define PACKAGE_VERSION "11"
 
 /* Version in windows resource format */
-#define PACKAGE_VERSION_RESOURCE 11,14,0,0
+#define PACKAGE_VERSION_RESOURCE @GUI_VERSION_MAJOR@,@GUI_VERSION_MINOR@,0,0
 
 /* Version as a string */
-#define PACKAGE_VERSION_RESOURCE_STR "11.14.0.0"
+#define PACKAGE_VERSION_RESOURCE_STR "@GUI_VERSION_MAJOR@.@GUI_VERSION_MINOR@.0.0"