# CMakeLists.txt - Main per-platform build script for sbc-harness project
#
# Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
# SPDX-License-Identifier: AGPL-3.0-or-later

cmake_minimum_required(VERSION 3.30)

if (NOT PICO_PLATFORM)
        message(FATAL_ERROR "PICO_PLATFORM must be specified; use the GNUmakefile to set this")
endif()

set(PICO_SDK_PATH "${CMAKE_SOURCE_DIR}/3rd-party/pico-sdk")

if (PICO_PLATFORM STREQUAL "rp2040")
	set(PICO_CLIB "picolibc")
	add_library(pico_cxx_options INTERFACE)
endif()
include("${PICO_SDK_PATH}/external/pico_sdk_import.cmake")

project(sbc_harness)

pico_sdk_init()

add_compile_options(-Wall -Wextra -Werror)

function(target_embed_sources arg_target arg_hdrname)
	set(embed_objs)
	foreach(embed_src IN LISTS ARGN)
		add_custom_command(
			OUTPUT            "${embed_src}.obj"
			WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
			COMMAND           mkdir -p -- "$<PATH:GET_PARENT_PATH,${CMAKE_CURRENT_BINARY_DIR}/${embed_src}>" &&
				${CMAKE_LINKER} -r -b binary -o "${CMAKE_CURRENT_BINARY_DIR}/${embed_src}.obj" "${embed_src}"
			DEPENDS           "${embed_src}"
		)
		list(APPEND embed_objs "${embed_src}.obj")
	endforeach()
	set_source_files_properties("${embed_objs}" PROPERTIES
		EXTERNAL_OBJECT true
		GENERATED true
	)

	set_source_files_properties("${arg_hdrname}" PROPERTIES
		GENERATED true
	)
	add_custom_command(
		OUTPUT  "${arg_hdrname}"
		COMMAND "${CMAKE_SOURCE_DIR}/build-aux/embed-sources.h.gen" "${embed_objs}" >"${arg_hdrname}"
		COMMAND_EXPAND_LISTS
		DEPENDS "${embed_objs}" "${CMAKE_SOURCE_DIR}/build-aux/embed-sources.h.gen"
	)

	target_sources("${arg_target}" PRIVATE "${embed_objs}" "${arg_hdrname}")
endfunction()

function(add_stack_analysis arg_outfile arg_objlib_target)
	target_compile_options("${arg_objlib_target}" PUBLIC "-fcallgraph-info=su,da")
	set_source_files_properties("${arg_outfile}" PROPERTIES
		GENERATED true
	)
	add_custom_command(
		OUTPUT  "${arg_outfile}"
		COMMAND "${CMAKE_SOURCE_DIR}/build-aux/stack.c.gen" "$<TARGET_OBJECTS:${arg_objlib_target}>" >"${arg_outfile}"
		COMMAND_EXPAND_LISTS
		DEPENDS "$<TARGET_OBJECTS:${arg_objlib_target}>" "${CMAKE_SOURCE_DIR}/build-aux/stack.c.gen"
		COMMENT "Calculating ${arg_objlib_target} required stack sizes"
	)
endfunction()

if (PICO_PLATFORM STREQUAL "rp2040")
	set(TESTS ON)
	add_subdirectory(3rd-party/picolibc)

	foreach(lib IN ITEMS pico_clib_interface)
		# cpp
		target_include_directories(${lib} INTERFACE ${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc/include)
		target_compile_definitions(${lib} INTERFACE
			PICO_RUNTIME_NO_INIT_PER_CORE_TLS_SETUP=1
			PICO_RUNTIME_SKIP_INIT_PER_CORE_TLS_SETUP=1
		)

		# cc
		target_compile_options(${lib} INTERFACE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs)
		target_compile_options(${lib} INTERFACE -nolibc)

		# ld
		target_link_options(   ${lib} INTERFACE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs)
		target_link_options(   ${lib} INTERFACE -nolibc -lgcc)
		target_link_libraries( ${lib} INTERFACE c)
	endforeach()
	target_link_options(   bs2_default PRIVATE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs -nolibc -lgcc)
	target_link_libraries( bs2_default c)
endif()

add_subdirectory(libcr)
add_subdirectory(libcr_ipc)
add_subdirectory(libmisc)
add_subdirectory(libhw)
add_subdirectory(libdhcp)
add_subdirectory(libusb)
add_subdirectory(lib9p)

add_subdirectory(cmd/sbc_harness)
add_subdirectory(cmd/srv9p)