[flang][driver] add version to flang executable

Author: everythingfunctional

flang/tools/flang-driver/CMakeLists.txt

@@ -28,6 +28,12 @@ clang_target_link_libraries(flang
   clangBasic
 )
 
+# This creates the executable with a version appended
+# and creates a symlink to it without the version
+if(CYGWIN OR NOT WIN32) # but it doesn't work on Windows
+  set_target_properties(flang PROPERTIES VERSION ${FLANG_EXECUTABLE_VERSION})
+endif()
+
 option(FLANG_PLUGIN_SUPPORT "Build Flang with plugin support." ON)
 
 # Enable support for plugins, which need access to symbols from flang