Fix IDICMAKE_PLATFORM_CONFIG properly, Update framework version to v5.3.0

Author: jonpas

README.md

@@ -31,7 +31,7 @@ $ cmake --build .   # or generated build system command (make, Visual Studio etc
 
 _Use with `cmake .. -D<argument>=<value>`._
 
-- `<PROJECT_NAME>_PLATFORM_CONFIG` (default: `platform_config.cmake`) - Platform configuration file.
+- `IDICMAKE_PLATFORM_CONFIG` (default: `platform_config.cmake`) - Platform configuration file (only for top-level project)
 - `IDICMAKE_BUILD_DEMOS` (default: `0`) - Build demo applications if applicable.
 - `IDICMAKE_BUILD_TESTS` (default: `1`) - Build unit tests. _(long)_
 - `DO_TEMPLATE_COMPONENT_TEST` (default: `0`) - Generate unit test template component and build unit tests for template.

cmake/idi/functions/framework/idi_load_platform_config.cmake

@@ -11,9 +11,9 @@ macro(idi_load_platform_config)
     idi_cmake_hook_abs(${CMAKE_CURRENT_LIST_DIR}/platform-local-options.cmake)
     idi_cmake_hook_abs(${CMAKE_CURRENT_LIST_DIR}/cmake-hooks/pre-configure.cmake)
 
-    set("${IDICMAKE_PREFIX}_PLATFORM_CONFIG" "${CMAKE_CURRENT_LIST_DIR}/platform-config.cmake" CACHE FILEPATH "Platform config definitions file")
-    set(IDICMAKE_PLATFORM_CONFIG "${${IDICMAKE_PREFIX}_PLATFORM_CONFIG}")
+    set(IDICMAKE_PLATFORM_CONFIG "${CMAKE_CURRENT_LIST_DIR}/platform-config.cmake" CACHE FILEPATH "Platform config definitions file")
     include("${IDICMAKE_PLATFORM_CONFIG}")
+    unset(IDICMAKE_PLATFORM_CONFIG CACHE) # prevent propagation to subprojects using this template
 
     idi_cmake_hook_abs(${CMAKE_CURRENT_LIST_DIR}/cmake-hooks/post-platform-config.cmake)
 

cmake/idi/version.cmake

@@ -13,7 +13,7 @@
 set(IDICMAKE_CPP_FRAMEWORK_VERSION_MAJOR 5)
 
 # Minor increments on backwards compat updates!
-set(IDICMAKE_CPP_FRAMEWORK_VERSION_MINOR 2)
+set(IDICMAKE_CPP_FRAMEWORK_VERSION_MINOR 3)
 
 # Hot fixes, which should be rare in this case.
 set(IDICMAKE_CPP_FRAMEWORK_VERSION_HOTFIX 0)