CMakeLists.txt

# Z80 - CMakeLists.txt
#     ______  ______ ______
#    /\___  \/\  __ \\  __ \
#    \/__/  /\_\  __ \\ \/\ \
#       /\_____\\_____\\_____\
# Zilog \/_____//_____//_____/ CPU Emulator
# Copyright (C) 1999-2024 Manuel Sainz de Baranda y Goñi.
# Released under the terms of the GNU Lesser General Public License v3.

cmake_minimum_required(
	# 3.14: install(TARGETS ARCHIVE [DESTINATION])
	VERSION 3.14...${CMAKE_VERSION})

if(	CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR AND
	NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES
)
	set(CMAKE_BUILD_TYPE Release)
endif()

file(READ "${CMAKE_CURRENT_SOURCE_DIR}/API/Z80.h" _)
string(REGEX MATCH ".*Z80_LIBRARY_VERSION_STRING \"([^\n]*)\".*" _ ${_})

project(Z80
	VERSION ${CMAKE_MATCH_1}
	LANGUAGES C
	DESCRIPTION "Zilog Z80 CPU emulator"
	HOMEPAGE_URL "https://zxe.io/software/Z80")

unset(_)
message("${PROJECT_NAME} v${PROJECT_VERSION}")

include(GNUInstallDirs)

set(${PROJECT_NAME}_DEPOT_LOCATION
"http://zxe.io/depot" CACHE STRING
"${PROJECT_NAME}: \
Directory or URL of the depot containing the test files.")

option(${PROJECT_NAME}_FETCH_TEST_FILES
"${PROJECT_NAME}: \
Copy or download the test files from the depot to the build directory."
NO)

set(${PROJECT_NAME}_INSTALL_CMAKEDIR
"${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}" CACHE STRING
"${PROJECT_NAME}: \
Directory in which to install the CMake config-file package.")

set(${PROJECT_NAME}_INSTALL_PKGCONFIGDIR
"${CMAKE_INSTALL_LIBDIR}/pkgconfig" CACHE STRING
"${PROJECT_NAME}: \
Directory in which to install the pkg-config file.")

set(${PROJECT_NAME}_NOSTDLIB_FLAGS
"Auto" CACHE STRING
"${PROJECT_NAME}: \
Linker flags used to avoid linking against system libraries.")

option(${PROJECT_NAME}_OBJECT_LIBS
"${PROJECT_NAME}: \
Build the emulator as an object library."
NO)

set(${PROJECT_NAME}_SPHINX_HTML_THEME
"" CACHE STRING
"${PROJECT_NAME}: \
Sphinx theme for the documentation in HTML format.")

option(${PROJECT_NAME}_WITH_CMAKE_SUPPORT
"${PROJECT_NAME}: \
Generate and install the CMake config-file package."
NO)

option(${PROJECT_NAME}_WITH_HTML_DOCUMENTATION
"${PROJECT_NAME}: \
Build and install the documentation in HTML format."
NO)

option(${PROJECT_NAME}_WITH_PDF_DOCUMENTATION
"${PROJECT_NAME}: \
Build and install the documentation in PDF format."
NO)

option(${PROJECT_NAME}_WITH_PKGCONFIG_SUPPORT
"${PROJECT_NAME}: \
Generate and install the pkg-config file."
NO)

option(${PROJECT_NAME}_WITH_STANDARD_DOCUMENTS
"${PROJECT_NAME}: \
Install the standard text documents distributed with the package: \
AUTHORS, COPYING, COPYING.LESSER, HISTORY, README and THANKS."
NO)

option(${PROJECT_NAME}_WITH_TESTS
"${PROJECT_NAME}: \
Build the testing tool."
NO)

option(${PROJECT_NAME}_WITH_EXECUTE
"${PROJECT_NAME}: \
Build the implementation of the `z80_execute` function."
NO)

option(${PROJECT_NAME}_WITH_FULL_IM0
"${PROJECT_NAME}: \
Build the full implementation of the interrupt mode 0 rather than the \
reduced one."
NO)

option(${PROJECT_NAME}_WITH_IM0_RETX_NOTIFICATIONS
"${PROJECT_NAME}: \
Enable optional notifications for any `reti` or `retn` instruction \
executed during the interrupt mode 0 response."
NO)

option(${PROJECT_NAME}_WITH_PARITY_COMPUTATION
"${PROJECT_NAME}: \
Enable actual parity calculation for the P/V flag instead of using a \
table of precomputed values (this is for benchmarks, DO NOT ENABLE in \
production builds)."
NO)

option(${PROJECT_NAME}_WITH_PRECOMPUTED_DAA
"${PROJECT_NAME}: \
Use a table of precomputed values in the `daa` instruction (this is for \
benchmarks, DO NOT ENABLE in production builds)."
NO)

option(${PROJECT_NAME}_WITH_Q
"${PROJECT_NAME}: \
Build the implementation of Q."
NO)

option(${PROJECT_NAME}_WITH_SPECIAL_RESET
"${PROJECT_NAME}: \
Build the implementation of the special RESET."
NO)

option(${PROJECT_NAME}_WITH_UNOFFICIAL_RETI
"${PROJECT_NAME}: \
Configure the undocumented instructions ED5Dh, ED6Dh and ED7Dh as `reti` \
instead of `retn`."
NO)

option(${PROJECT_NAME}_WITH_ZILOG_NMOS_LD_A_IR_BUG
"${PROJECT_NAME}: \
Build the implementation of the bug affecting the Zilog Z80 NMOS, which \
causes the P/V flag to be reset when a maskable interrupt is accepted \
during the execution of the `ld a,{i|r}` instructions."
NO)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake")
find_package(Zeta REQUIRED)

if(${PROJECT_NAME}_OBJECT_LIBS)
	add_library(${PROJECT_NAME} OBJECT)
else()
	if(DEFINED ${PROJECT_NAME}_SHARED_LIBS)
		set(BUILD_SHARED_LIBS ${${PROJECT_NAME}_SHARED_LIBS})
	endif()

	add_library(${PROJECT_NAME})
endif()

target_sources(
	${PROJECT_NAME} PRIVATE
	"${CMAKE_CURRENT_SOURCE_DIR}/API/Z80.h"
	"${CMAKE_CURRENT_SOURCE_DIR}/sources/Z80.c")

set_target_properties(
	${PROJECT_NAME} PROPERTIES
	C_STANDARD 99
	C_STANDARD_REQUIRED NO
	VERSION	${PROJECT_VERSION}
	SOVERSION ${PROJECT_VERSION_MAJOR}
	DEBUG_POSTFIX "-debug"
	PUBLIC_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/API/Z80.h")

target_link_libraries(${PROJECT_NAME} PUBLIC Zeta)

target_include_directories(
	${PROJECT_NAME} PUBLIC
	"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/API>"
	"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>")

if(${PROJECT_NAME}_OBJECT_LIBS OR NOT BUILD_SHARED_LIBS)
	target_compile_definitions(${PROJECT_NAME} PUBLIC Z80_STATIC)
else()
	if(WIN32)
		if(PROJECT_VERSION_PATCH STREQUAL "")
			set(PROJECT_VERSION_PATCH 0)
		endif()

		configure_file(
			"${CMAKE_CURRENT_SOURCE_DIR}/sources/Z80.rc.in"
			"${CMAKE_CURRENT_BINARY_DIR}/Z80.rc"
			@ONLY)

		target_sources(${PROJECT_NAME} PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/Z80.rc")
	endif()

	if(${PROJECT_NAME}_NOSTDLIB_FLAGS STREQUAL "Auto")
		if(MSVC)
			target_compile_definitions(${PROJECT_NAME} PRIVATE Z80_WITH_DLL_MAIN_CRT_STARTUP)
			target_link_options(${PROJECT_NAME} PRIVATE "/NODEFAULTLIB")
		elseif(APPLE)
			if(CMAKE_C_COMPILER_ID MATCHES "^(AppleClang|Clang|GNU)$")
				target_link_options(${PROJECT_NAME} PRIVATE "LINKER:-dead_strip_dylibs")
			endif()
		elseif(CMAKE_C_COMPILER_ID MATCHES "^(ARMClang|Clang|GNU|Intel|TinyCC|XL|XLClang)$")
			target_link_options(${PROJECT_NAME} PRIVATE "-nostdlib")
		elseif(CMAKE_C_COMPILER_ID MATCHES "PGI")
			target_link_options(${PROJECT_NAME} PRIVATE "-Mnostdlib")
		elseif(CMAKE_C_COMPILER_ID MATCHES "SunPro")
			target_link_options(${PROJECT_NAME} PRIVATE "-xnolib")
		endif()
	elseif(NOT ${PROJECT_NAME}_NOSTDLIB_FLAGS STREQUAL "")
		target_link_options(${PROJECT_NAME} PRIVATE ${${PROJECT_NAME}_NOSTDLIB_FLAGS})
	endif()
endif()

target_compile_definitions(
	${PROJECT_NAME} PRIVATE
	$<$<BOOL:${${PROJECT_NAME}_WITH_EXECUTE}>:Z80_WITH_EXECUTE>
	$<$<BOOL:${${PROJECT_NAME}_WITH_FULL_IM0}>:Z80_WITH_FULL_IM0>
	$<$<BOOL:${${PROJECT_NAME}_WITH_IM0_RETX_NOTIFICATIONS}>:Z80_WITH_IM0_RETX_NOTIFICATIONS>
	$<$<BOOL:${${PROJECT_NAME}_WITH_PARITY_COMPUTATION}>:Z80_WITH_PARITY_COMPUTATION>
	$<$<BOOL:${${PROJECT_NAME}_WITH_PRECOMPUTED_DAA}>:Z80_WITH_PRECOMPUTED_DAA>
	$<$<BOOL:${${PROJECT_NAME}_WITH_Q}>:Z80_WITH_Q>
	$<$<BOOL:${${PROJECT_NAME}_WITH_SPECIAL_RESET}>:Z80_WITH_SPECIAL_RESET>
	$<$<BOOL:${${PROJECT_NAME}_WITH_UNOFFICIAL_RETI}>:Z80_WITH_UNOFFICIAL_RETI>
	$<$<BOOL:${${PROJECT_NAME}_WITH_ZILOG_NMOS_LD_A_IR_BUG}>:Z80_WITH_ZILOG_NMOS_LD_A_IR_BUG>)

install(TARGETS ${PROJECT_NAME}
	EXPORT  ${PROJECT_NAME}_Targets
	RUNTIME COMPONENT ${PROJECT_NAME}_Runtime
	LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
		COMPONENT ${PROJECT_NAME}_Runtime
		NAMELINK_COMPONENT ${PROJECT_NAME}_Development
	ARCHIVE COMPONENT ${PROJECT_NAME}_Development
	PUBLIC_HEADER
		DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
		COMPONENT ${PROJECT_NAME}_Development)

if(	NOT ${PROJECT_NAME}_OBJECT_LIBS AND
	(${PROJECT_NAME}_WITH_CMAKE_SUPPORT OR ${PROJECT_NAME}_WITH_PKGCONFIG_SUPPORT)
)
	include(CMakePackageConfigHelpers)

	if(${PROJECT_NAME}_WITH_CMAKE_SUPPORT)
		if(BUILD_SHARED_LIBS)
			set(_type Shared)
		else()
			set(_type Static)
		endif()

		install(EXPORT ${PROJECT_NAME}_Targets
			DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKEDIR}"
			FILE ${PROJECT_NAME}${_type}Targets.cmake
			COMPONENT ${PROJECT_NAME}_Development)

		unset(_type)

		write_basic_package_version_file(
			"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
			VERSION ${PROJECT_VERSION}
			COMPATIBILITY SameMajorVersion)

		configure_package_config_file(
			"${CMAKE_CURRENT_SOURCE_DIR}/support/${PROJECT_NAME}Config.cmake.in"
			"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
			INSTALL_DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKEDIR}")

		install(FILES
			"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
			"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
			DESTINATION "${${PROJECT_NAME}_INSTALL_CMAKEDIR}"
			COMPONENT ${PROJECT_NAME}_Development)
	endif()

	if(${PROJECT_NAME}_WITH_PKGCONFIG_SUPPORT)
		configure_file(
			"${CMAKE_CURRENT_SOURCE_DIR}/support/${PROJECT_NAME}.pc.in"
			"${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
			@ONLY)

		install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
			DESTINATION "${${PROJECT_NAME}_INSTALL_PKGCONFIGDIR}"
			COMPONENT ${PROJECT_NAME}_Development)
	endif()
endif()

if(${PROJECT_NAME}_WITH_STANDARD_DOCUMENTS)
	install(FILES	"${CMAKE_CURRENT_SOURCE_DIR}/AUTHORS"
			"${CMAKE_CURRENT_SOURCE_DIR}/COPYING"
			"${CMAKE_CURRENT_SOURCE_DIR}/COPYING.LESSER"
			"${CMAKE_CURRENT_SOURCE_DIR}/HISTORY"
			"${CMAKE_CURRENT_SOURCE_DIR}/README"
			"${CMAKE_CURRENT_SOURCE_DIR}/THANKS"
		DESTINATION "${CMAKE_INSTALL_DOCDIR}"
		COMPONENT ${PROJECT_NAME}_Runtime)
endif()

if(${PROJECT_NAME}_WITH_HTML_DOCUMENTATION OR ${PROJECT_NAME}_WITH_PDF_DOCUMENTATION)
	add_subdirectory(documentation)
endif()

if(${PROJECT_NAME}_WITH_TESTS)
	include(CTest)

	find_package(ZLIB   QUIET)
	find_package(libzip QUIET)

	add_executable(test-${PROJECT_NAME} "${CMAKE_CURRENT_SOURCE_DIR}/sources/test-Z80.c")
	target_link_libraries(test-${PROJECT_NAME} PRIVATE ${PROJECT_NAME})

	if(ZLIB_FOUND AND libzip_FOUND)
		target_link_libraries(test-${PROJECT_NAME} PRIVATE ZLIB::ZLIB libzip::zip)
		target_compile_definitions(test-${PROJECT_NAME} PRIVATE TEST_Z80_WITH_ARCHIVE_EXTRACTION)
	endif()

	if(${PROJECT_NAME}_WITH_EXECUTE)
		target_compile_definitions(test-${PROJECT_NAME} PRIVATE TEST_Z80_WITH_EXECUTE)
	endif()

	if(${PROJECT_NAME}_FETCH_TEST_FILES)
		function(_fetch_files _file_list _location _destination_dir)
			file(STRINGS "${_file_list}" _lines)

			if(_location MATCHES ".*://.*")
				set(_message_action "Downloading")
			else()
				set(_message_action "Copying")
				get_filename_component(_location "${_location}" ABSOLUTE)
				set(_location "file://${_location}")
			endif()

			foreach(_line ${_lines})
				string(STRIP "${_line}" _line)
				string(SUBSTRING "${_line}" 0 128 _file_hash)
				string(SUBSTRING "${_line}" 130 -1 _file_path)
				get_filename_component(_file_name "${_file_path}" NAME)

				set(_file_url "${_location}/${_file_path}")
				string(REPLACE " " "%20" _file_url "${_file_url}")
				string(REPLACE "!" "%21" _file_url "${_file_url}")
				string(REPLACE "(" "%28" _file_url "${_file_url}")
				string(REPLACE ")" "%29" _file_url "${_file_url}")
				string(REPLACE "," "%2C" _file_url "${_file_url}")
				string(REPLACE "[" "%5B" _file_url "${_file_url}")
				string(REPLACE "]" "%5D" _file_url "${_file_url}")

				message(STATUS "${_message_action} \"${_file_name}\"")

				file(	DOWNLOAD
					"${_file_url}"
					"${_destination_dir}/${_file_path}"
					EXPECTED_HASH SHA3_512=${_file_hash})

				if(	NOT "${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_LESS 3.18 AND
					(NOT ZLIB_FOUND OR NOT libzip_FOUND)
				)
					get_filename_component(_file_extension "${_file_name}" LAST_EXT)

					if(_file_extension STREQUAL ".gz" OR _file_extension STREQUAL ".zip")
						get_filename_component(_subdirectory "${_file_path}" DIRECTORY)

						if(_file_extension STREQUAL ".gz")
							set(_extract_pattern "*zex*.com")
						else()
							set(_extract_pattern "*.tap")
						endif()

						file(	ARCHIVE_EXTRACT
							INPUT "${_destination_dir}/${_file_path}"
							DESTINATION "${_destination_dir}/${_subdirectory}"
							PATTERNS "${_extract_pattern}"
							VERBOSE)
					endif()
				endif()
			endforeach()
		endfunction()

		_fetch_files(
			"${CMAKE_CURRENT_SOURCE_DIR}/support/firmware.sha3-512"
			"${${PROJECT_NAME}_DEPOT_LOCATION}/firmware"
			"${CMAKE_CURRENT_BINARY_DIR}/depot/firmware")

		_fetch_files(
			"${CMAKE_CURRENT_SOURCE_DIR}/support/software.sha3-512"
			"${${PROJECT_NAME}_DEPOT_LOCATION}/software"
			"${CMAKE_CURRENT_BINARY_DIR}/depot/software")

		if(	"${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_LESS 3.18 AND
			(NOT ZLIB_FOUND OR NOT libzip_FOUND)
		)
			message(WARNING
				"libzip or zlib were not found on your system, which will cause "
				"test-Z80 to be built without archive extraction support. When "
				"this happens, the build system extracts the test files that "
				"are compressed so that test-Z80 can use them later, but this "
				"has failed because the version of CMake you are using is too "
				"old and does not support archive extraction.\n"
				"To fix this, expand all archives with \".tar.gz\" or \".zip\" "
				"extension located in "
				"\"${CMAKE_CURRENT_BINARY_DIR}/depot/software/**/\".")
		endif()
	endif()

	if(${PROJECT_NAME}_FETCH_TEST_FILES OR ${PROJECT_NAME}_DEPOT_LOCATION MATCHES ".*://.*")
		set(_depot_dir "${CMAKE_CURRENT_BINARY_DIR}/depot")
	else()
		set(_depot_dir "${${PROJECT_NAME}_DEPOT_LOCATION}")
	endif()

	add_test(
		NAME test-${PROJECT_NAME}
		COMMAND test-${PROJECT_NAME}
			--path "${_depot_dir}/firmware"
			--path "${_depot_dir}/software/POSIX"
			--path "${_depot_dir}/software/ZX Spectrum"
			--all
		WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")

	unset(_depot_dir)
endif()

if(NOT CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
	message("${PROJECT_NAME} END")
endif()

# CMakeLists.txt EOF