cmake: Using Arm compiler from Mbed Studio

Added a command line option `-DMBEDIDE=ON` which allows using Arm
compiler shipped with Mbed Studio on local machines.

Signed-off-by: Devaraj Ranganna <devaraj.ranganna@arm.com>

cmake/app.cmake

@@ -64,9 +64,9 @@ if(MBED_TOOLCHAIN STREQUAL "GCC_ARM")
     )
 elseif(MBED_TOOLCHAIN STREQUAL "ARM")
     set(CMAKE_POST_BUILD_COMMAND
-        COMMAND ${ELF2BIN} --bin  -o $<TARGET_FILE:app>.bin $<TARGET_FILE:app>
+        COMMAND ${ELF2BIN} ${MBED_STUDIO_ARM_COMPILER} --bin  -o $<TARGET_FILE:app>.bin $<TARGET_FILE:app>
         COMMAND ${CMAKE_COMMAND} -E echo "-- built: $<TARGET_FILE:app>.bin"
-        COMMAND ${ELF2BIN} --i32combined  -o $<TARGET_FILE:app>.hex $<TARGET_FILE:app>
+        COMMAND ${ELF2BIN} ${MBED_STUDIO_ARM_COMPILER} --i32combined  -o $<TARGET_FILE:app>.hex $<TARGET_FILE:app>
         COMMAND ${CMAKE_COMMAND} -E echo "-- built: $<TARGET_FILE:app>.hex"
     )
 elseif(MBED_TOOLCHAIN STREQUAL "IAR")

cmake/toolchain.cmake

@@ -1,4 +1,8 @@
 # Copyright (c) 2020 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+option(MBEDIDE "Use Arm compiler from Mbed Studio" OFF)
+if(MBEDIDE)
+    set(MBED_STUDIO_ARM_COMPILER "--ide=mbed")
+endif()
 include(${MBED_ROOT}/cmake/toolchains/${MBED_TOOLCHAIN}.cmake)

cmake/toolchains/ARM.cmake

@@ -7,6 +7,7 @@ set(CMAKE_CXX_COMPILER    "armclang")
 set(CMAKE_AR              "armar")
 set(ELF2BIN               "fromelf")
 set(COMMON_FLAGS " \
+    ${MBED_STUDIO_ARM_COMPILER} \
     -c \
     --target=arm-arm-none-eabi \
     -Oz \
@@ -26,9 +27,13 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} \
     ${COMMON_FLAGS} \
 ")
 set(CMAKE_ASM_FLAGS "${CMAKE_ASM_FLAGS} \
+    ${MBED_STUDIO_ARM_COMPILER} \
     --cpreproc \
     --cpreproc_opts=--target=arm-arm-none-eabi,-mcpu=cortex-m4,-D,__FPU_PRESENT,-D,MBED_CONF_PLATFORM_CRASH_CAPTURE_ENABLED \
 ")
+set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} \
+    ${MBED_STUDIO_ARM_COMPILER} \
+")
 
 add_definitions(
     -DTOOLCHAIN_ARM