#-------------------------------------------------------------------------------
# Copyright (c) 2020-2022, Arm Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
#-------------------------------------------------------------------------------

# Since we append to default compilation flags stop multiple inclusion to avoid
# flags being added multiple times.
include_guard(GLOBAL)

#GNUARM v8 and v9 compilers use a different triplet.
if(NOT CROSS_COMPILE AND NOT DEFINED ENV{CROSS_COMPILE})
	set(CROSS_COMPILE "aarch64-elf-;aarch64-none-elf-;aarch64-linux-gnu-;aarch64-none-linux-gnu-" CACHE STRING "List of GCC prefix triplets to use.")
endif()

set(CMAKE_CROSSCOMPILING True)
set(CMAKE_SYSTEM_NAME Generic)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_POSITION_INDEPENDENT_CODE True)

set(TS_DEBUG_INFO_FLAGS "-fdiagnostics-show-option -gdwarf-2" CACHE STRING "Compiler flags to add debug information.")
set(TS_MANDATORY_AARCH_FLAGS "-fpic -mstrict-align" CACHE STRING "Compiler flags configuring architecture specific ")
set(TS_WARNING_FLAGS "-Wall" CACHE STRING "Compiler flags affecting generating warning messages.")
set(TS_MANDATORY_LINKER_FLAGS "-pie -Wl,--as-needed -Wl,--sort-section=alignment -zmax-page-size=4096"
	CACHE STRING "Linker flags needed for correct builds.")

# Set flags affecting all build types
foreach(_b_type IN ITEMS DEBUG MINSIZEREL MINSIZWITHDEBINFO RELEASE RELWITHDEBINFO)
	string(APPEND CMAKE_C_FLAGS_${_b_type}_INIT " ${TS_MANDATORY_AARCH_FLAGS}")
	string(APPEND CMAKE_CXX_FLAGS_${_b_type}_INIT " ${TS_MANDATORY_AARCH_FLAGS}")
	string(APPEND CMAKE_EXE_LINKER_FLAGS_${_b_type}_INIT " ${TS_MANDATORY_LINKER_FLAGS}")
	if(DEFINED TS_ROOT)
		# Flags not to be used with external components.
		string(APPEND CMAKE_C_FLAGS_${_b_type}_INIT " ${TS_WARNING_FLAGS}")
		string(APPEND CMAKE_CXX_FLAGS_${_b_type}_INIT " ${TS_WARNING_FLAGS}")
	endif()
endforeach()

# Set flags affecting all build types supporting debugging.
foreach(_b_type IN ITEMS DEBUG RELWITHDEBINFO MINSIZWITHDEBINFO)
	string(APPEND CMAKE_C_FLAGS_${_b_type}_INIT " ${TS_DEBUG_INFO_FLAGS}")
	string(APPEND CMAKE_CXX_FLAGS_${_b_type}_INIT " ${TS_DEBUG_INFO_FLAGS}")
endforeach()

# Build type specific flags
string(APPEND CMAKE_C_FLAGS_DEBUG_INIT " -O0")
string(APPEND CMAKE_C_FLAGS_MINSIZEREL_INIT  " -Os")
string(APPEND CMAKE_C_FLAGS_MINSIZWITHDEBINFO_INIT " -Os")
string(APPEND CMAKE_C_FLAGS_RELEASE_INIT " -O2")
string(APPEND CMAKE_C_FLAGS_RELWITHDEBINFO_INIT " -O2")
string(APPEND CMAKE_CXX_FLAGS_DEBUG_INIT " -O0")
string(APPEND CMAKE_CXX_FLAGS_MINSIZEREL_INIT  " -Os")
string(APPEND CMAKE_CXX_FLAGS_MINSIZWITHDEBINFO_INIT " -Os")
string(APPEND CMAKE_CXX_FLAGS_RELEASE_INIT " -O2")
string(APPEND CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT " -O2")

include($ENV{TS_ROOT}/tools/cmake/compiler/GCC.cmake REQUIRED)
include($ENV{TS_ROOT}/tools/cmake/compiler/config_iface.cmake REQUIRED)