Build: Fix compiler related cmake variables

This change fixes some compiler related variables in the cmake files.

Change-Id: Icd1059aa6b4dc7c7a617fcd6ceb3a0216854e349
Signed-off-by: Sverteczky, Marcell <marcell.sverteczky@arm.com>
diff --git a/cmake/Common/CompilerGNUARM73.cmake b/cmake/Common/CompilerGNUARM73.cmake
index 29b9555..5b173e0 100644
--- a/cmake/Common/CompilerGNUARM73.cmake
+++ b/cmake/Common/CompilerGNUARM73.cmake
@@ -1,5 +1,5 @@
 #-------------------------------------------------------------------------------
-# Copyright (c) 2018, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2019, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -39,20 +39,20 @@
 	if(NOT DEFINED ARM_CPU_TYPE)
 		string_append_unique_item(_NO_ARM_CPU_TYPE true)
 	elseif(${ARM_CPU_TYPE} STREQUAL "Cortex-M3")
-		string_append_unique_item (CMAKE_C_FLAGS_CPU "-mcpu=cortex-m3")
-		string_append_unique_item (CMAKE_CXX_FLAGS_CPU "-mcpu=cortex-m3")
-		string_append_unique_item (CMAKE_ASM_FLAGS_CPU "--cpu=Cortex-M3")
-		string_append_unique_item (CMAKE_LINK_FLAGS_CPU "--cpu=Cortex-M3")
+		string_append_unique_item(STRING CMAKE_C_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m3")
+		string_append_unique_item(STRING CMAKE_CXX_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m3")
+		string_append_unique_item(STRING CMAKE_ASM_FLAGS_CPU KEY "--cpu=" VAL  "--cpu=Cortex-M3")
+		string_append_unique_item(STRING CMAKE_LINK_FLAGS_CPU KEY "--cpu=" VAL "--cpu=Cortex-M3")
 	elseif(${ARM_CPU_TYPE} STREQUAL "Cortex-M33")
-		string_append_unique_item (CMAKE_C_FLAGS_CPU "-mcpu=cortex-m33")
-		string_append_unique_item (CMAKE_CXX_FLAGS_CPU "-mcpu=cortex-m33")
-		string_append_unique_item (CMAKE_ASM_FLAGS_CPU "--cpu=Cortex-M33")
-		string_append_unique_item (CMAKE_LINK_FLAGS_CPU "--cpu=Cortex-M33")
+		string_append_unique_item(STRING CMAKE_C_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m33")
+		string_append_unique_item(STRING CMAKE_CXX_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m33")
+		string_append_unique_item(STRING CMAKE_ASM_FLAGS_CPU KEY "--cpu=" VAL "--cpu=Cortex-M33")
+		string_append_unique_item(STRING CMAKE_LINK_FLAGS_CPU KEY "--cpu=" VAL "--cpu=Cortex-M33")
 	elseif(${ARM_CPU_TYPE} STREQUAL "Cortex-M23")
-		string_append_unique_item (CMAKE_C_FLAGS_CPU "-mcpu=cortex-m23")
-		string_append_unique_item (CMAKE_CXX_FLAGS_CPU "-mcpu=cortex-m23")
-		string_append_unique_item (CMAKE_ASM_FLAGS_CPU "--cpu=Cortex-M23")
-		string_append_unique_item (CMAKE_LINK_FLAGS_CPU "--cpu=Cortex-M23")
+		string_append_unique_item(STRING CMAKE_C_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m23")
+		string_append_unique_item(STRING CMAKE_CXX_FLAGS_CPU KEY "-mcpu=" VAL "-mcpu=cortex-m23")
+		string_append_unique_item(STRING CMAKE_ASM_FLAGS_CPU KEY "--cpu=" VAL "--cpu=Cortex-M23")
+		string_append_unique_item(STRING CMAKE_LINK_FLAGS_CPU KEY "--cpu=" VAL "--cpu=Cortex-M23")
 	else()
 		message(FATAL_ERROR "Unknown ARM cpu setting.")
 	endif()