cmake: clang: Don't unconditionally use gcc's fortify

clang doesn't understand fortify at all, provide no op macro,
in order to handle the request to fortify in a generic way.

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

Author: ozhuraki

cmake/compiler/clang/target.cmake

@@ -63,9 +63,12 @@ string(REPLACE ";" " " CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
 
 # Load toolchain_cc-family macros
 # Clang and GCC are almost feature+flag compatible, so reuse freestanding gcc
-include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_security_fortify.cmake)
 include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_security_canaries.cmake)
 include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_optimizations.cmake)
 include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_cpp.cmake)
 include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_asm.cmake)
 include(${ZEPHYR_BASE}/cmake/compiler/gcc/target_baremetal.cmake)
+
+macro(toolchain_cc_security_fortify)
+  # No op, clang doesn't understand fortify at all
+endmacro()