CMake: Add support for SiLabs SL_RAIL

Author: hugueskamba

targets/TARGET_Silicon_Labs/TARGET_SL_RAIL/CMakeLists.txt

@@ -0,0 +1,20 @@
+# Copyright (c) 2020 ARM Limited. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+if("EFR32_12" IN_LIST MBED_TARGET_LABELS)
+    if(${MBED_TOOLCHAIN} STREQUAL "ARM")
+        set(LIB_RAIL efr32-rf-driver/rail/TARGET_EFR32_12/librail_efr32xg12_release.ar)
+    elseif(${MBED_TOOLCHAIN} STREQUAL "GCC_ARM")
+        set(LIB_RAIL efr32-rf-driver/rail/TARGET_EFR32_12/librail_efr32xg12_release.a)
+    endif()
+endif()
+
+target_link_libraries(mbed-core INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/${LIB_RAIL})
+
+
+target_include_directories(mbed-core
+    INTERFACE
+        efr32-rf-driver/rail
+        efr32-rf-driver/rail/ble
+        efr32-rf-driver/rail/ieee802154
+)