cmake: llvm: Invalidate toolchain capability cache

Invalidate toolchain capability cache on toolchain configuration.

Signed-off-by: Oleg Zhurakivskyy <[email protected]>

Author: ozhuraki

cmake/toolchain/llvm/generic.cmake

@@ -1,5 +1,13 @@
 # SPDX-License-Identifier: Apache-2.0
 
+find_appropriate_cache_directory(USER_CACHE_DIR)
+
+if((NOT "${USER_CACHE_DIR}" STREQUAL "") AND (EXISTS "${USER_CACHE_DIR}"))
+  message(STATUS "Invalidating toolchain capability cache in ${USER_CACHE_DIR}")
+  execute_process(COMMAND
+    ${CMAKE_COMMAND} -E remove_directory "${USER_CACHE_DIR}")
+endif()
+
 if(DEFINED $ENV{CLANG_ROOT_DIR})
   set(TOOLCHAIN_HOME ${CLANG_ROOT}/bin/)
 endif()