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CMakeLists.txt
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cmake_minimum_required(VERSION 3.9)
cmake_policy(VERSION 3.9)
set (PROJECT openloco)
project(${PROJECT} CXX)
if (APPLE)
# Detection of this variable seems to fail with CMake.
# Since we only support 32-bit builds at the moment, fix it this way.
# TODO: find out a proper fix for this.
set(CMAKE_SIZEOF_VOID_P 4)
endif()
if (CMAKE_BINARY_DIR STREQUAL CMAKE_SOURCE_DIR)
message(FATAL_ERROR "Building in-source is not supported! Create a build dir and remove ${CMAKE_SOURCE_DIR}/CMakeCache.txt")
endif()
INCLUDE(FindPkgConfig)
include(CheckCXXCompilerFlag)
option(STRICT "Build with warnings as errors" YES)
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake;${CMAKE_MODULE_PATH}")
# Describe current version in terms of closest tag
execute_process(
COMMAND git describe HEAD --always
COMMAND sed -E "s/-g.+$//"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE OPENLOCO_VERSION_TAG
OUTPUT_STRIP_TRAILING_WHITESPACE
# ERROR_QUIET
)
# Define current git branch
execute_process(
COMMAND git rev-parse --abbrev-ref HEAD
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE OPENLOCO_BRANCH
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)
# Define short commit hash
execute_process(
COMMAND git rev-parse --short HEAD
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE OPENLOCO_COMMIT_SHA1_SHORT
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)
# To avoid unnecessary rebuilds, set the current branch and short sha1 hash
# only for the one file that uses these definitions: version.cpp
set_property(SOURCE ${CMAKE_SOURCE_DIR}/src/openloco/version.cpp
PROPERTY COMPILE_DEFINITIONS
OPENLOCO_VERSION_TAG="${OPENLOCO_VERSION_TAG}"
OPENLOCO_BRANCH="${OPENLOCO_BRANCH}"
OPENLOCO_COMMIT_SHA1_SHORT="${OPENLOCO_COMMIT_SHA1_SHORT}")
# Set some compiler features
set(COMMON_COMPILE_OPTIONS "${COMMON_COMPILE_OPTIONS} -fstrict-aliasing -Wall -Wextra -Wno-unused-parameter")
if (STRICT)
set(COMMON_COMPILE_OPTIONS "${COMMON_COMPILE_OPTIONS} -Werror")
endif ()
# Poke some holes in -Wall:
set(COMMON_COMPILE_OPTIONS
"${COMMON_COMPILE_OPTIONS} \
-Wno-unknown-pragmas \
-Wno-unused-private-field \
")
# Set warnings common to supported compilers
set(COMMON_COMPILE_OPTIONS
"${COMMON_COMPILE_OPTIONS} \
-Waddress \
-Warray-bounds \
-Wchar-subscripts \
-Wenum-compare \
-Wformat \
-Wignored-qualifiers \
-Winit-self \
-Wmissing-declarations \
-Wnon-virtual-dtor \
-Wnull-dereference \
-Wstrict-aliasing \
-Wstrict-overflow=1 \
-Wundef \
-Wunreachable-code \
")
set(OBJ_FORMAT "elf32-i386")
set(LINKER_SCRIPT "ld_script_i386.xc")
# Handle creating the rct2 text and data files on OS X and Linux
if (UNIX)
set(OLOCO_EXE ${CMAKE_CURRENT_SOURCE_DIR}/loco.exe)
set(OLOCO_TEXT ${CMAKE_BINARY_DIR}/openloco_text)
set(OLOCO_DATA ${CMAKE_BINARY_DIR}/openloco_data)
add_custom_command(
OUTPUT ${OLOCO_TEXT}
COMMAND dd if="${OLOCO_EXE}" of="${OLOCO_TEXT}" bs=4096 skip=1 count=214
DEPENDS ${OLOCO_EXE}
)
add_custom_command(
OUTPUT ${OLOCO_DATA}
COMMAND dd if="${OLOCO_EXE}" of="${OLOCO_DATA}" bs=4096 skip=215 count=78
COMMAND dd if=/dev/zero of="${OLOCO_DATA}" bs=4096 seek=78 count=3133 conv=notrunc
DEPENDS ${OLOCO_EXE}
)
add_custom_target(segfiles DEPENDS ${OLOCO_TEXT} ${OLOCO_DATA})
if (APPLE)
set(LOCO_SEGMENT_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -sectcreate loco_text __text \"${OLOCO_TEXT}\" -sectcreate loco_data __data ${OLOCO_DATA} -segaddr loco_data 0x4d7000 -segprot loco_data rwx rwx -segaddr loco_text 0x401000 -segprot loco_text rwx rwx -segaddr __TEXT 0x2000000 -read_only_relocs suppress")
else ()
# For Linux we have to use objcopy to wrap regular binaries into a linkable
# format. We use specific section names which are then referenced in a
# bespoke linker script so they can be placed at predefined VMAs.
add_custom_command(
OUTPUT openloco_text_section.o
COMMAND objcopy --input binary --output ${OBJ_FORMAT} --binary-architecture i386 \"${OLOCO_TEXT}\" openloco_text_section.o --rename-section .data=.loco_text,contents,alloc,load,readonly,code
DEPENDS segfiles
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)
add_custom_command(
OUTPUT openloco_data_section.o
COMMAND objcopy --input binary --output ${OBJ_FORMAT} --binary-architecture i386 \"${OLOCO_DATA}\" openloco_data_section.o --rename-section .data=.loco_data,contents,alloc,load,readonly,data
DEPENDS segfiles
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)
add_custom_target(linkable_sections DEPENDS openloco_text_section.o openloco_data_section.o)
set_source_files_properties(
openloco_text_section.o openloco_data_section.o
PROPERTIES
EXTERNAL_OBJECT true
GENERATED true
)
# can't use GLOB here, as the files don't exist yet at cmake-time
set(LOCO_SECTIONS "${CMAKE_BINARY_DIR}/openloco_data_section.o" "${CMAKE_BINARY_DIR}/openloco_text_section.o")
set(LOCO_SEGMENT_LINKER_FLAGS "-Wl,-T,\"${CMAKE_CURRENT_SOURCE_DIR}/distribution/linux/${LINKER_SCRIPT}\"")
endif ()
endif (UNIX)
set(DEBUG_LEVEL 0 CACHE STRING "Select debug level for compilation. Use value in range 0–3.")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DDEBUG=${DEBUG_LEVEL}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DDEBUG=${DEBUG_LEVEL}")
# include lib
include_directories("lib/")
# add source files
file(GLOB_RECURSE OLOCO_SOURCES "src/*.cpp")
file(GLOB_RECURSE OLOCO_HEADERS "src/*.h" "src/*.hpp")
if (APPLE)
file(GLOB_RECURSE OLOCO_MM_SOURCES "src/*.mm")
set_source_files_properties(${OLOCO_MM_SOURCES} PROPERTIES COMPILE_FLAGS "-x objective-c++ -fmodules")
endif ()
set(PIE_FLAG "-fno-pie")
set(TARGET_M "-m32")
# Check if a flag exists and add it to the list of compiler (so, not linker) options
function (ADD_CHECK_CXX_COMPILER_FLAG _CXXFLAGS _CACHE_VAR _FLAG)
CHECK_CXX_COMPILER_FLAG("${_FLAG}" "${_CACHE_VAR}")
if (${_CACHE_VAR})
list(APPEND SUPPORTED_CHECK_CXX_COMPILER_FLAGS "${_FLAG}")
else ()
message(STATUS "Unsupported CXXFLAG: ${_FLAG}")
endif ()
endfunction ()
# Check if a flag exists and add it to the compiler and the linker options
function (ADD_CHECK_CXX_FLAG _CXXFLAGS _CACHE_VAR _FLAG)
CHECK_CXX_COMPILER_FLAG("${_FLAG}" "${_CACHE_VAR}")
if (${_CACHE_VAR})
set(${_CXXFLAGS} "${${_CXXFLAGS}} ${_FLAG}" PARENT_SCOPE)
else ()
message(STATUS "Unsupported CXXFLAG: ${_FLAG}")
endif ()
endfunction ()
ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_NON_VIRTUAL_DTOR -Wnon-virtual-dtor)
ADD_CHECK_CXX_FLAG(CMAKE_CXX_FLAGS CXX_WNO_CLOBBERED -Wno-clobbered)
# set necessary flags to compile code as is
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TARGET_M} -std=gnu99 ${COMMON_COMPILE_OPTIONS} -Wimplicit")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TARGET_M} ${COMMON_COMPILE_OPTIONS}")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${TARGET_M}")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS} ${TARGET_M} ${PIE_FLAG}")
find_package(SDL2 REQUIRED)
if (NOT SDL2_LIBRARIES)
if (TARGET SDL2::SDL2-static)
set(SDL2_LIBRARIES SDL2::SDL2-static)
elseif (TARGET SDL2::SDL2)
set(SDL2_LIBRARIES SDL2::SDL2)
endif()
endif()
find_package(SDL2_mixer REQUIRED)
find_package(PNG REQUIRED)
# The hint provided here is targetting Arch Linux, a distro of choice for many contributors
if ("${CMAKE_SYSTEM_NAME}" MATCHES "(Free|Net|Open|DragonFly)BSD")
find_package(yaml-cpp REQUIRED)
include_directories(${YAML_CPP_INCLUDE_DIR})
else()
find_package(yaml-cpp REQUIRED HINTS /usr/lib32/cmake/yaml-cpp)
endif()
# Disable optimizations for interop.cpp for all compilers, to allow optimized
# builds without need for -fno-omit-frame-pointer
set_source_files_properties("${CMAKE_CURRENT_SOURCE_DIR}/src/openloco/interop/interop.cpp" PROPERTIES COMPILE_FLAGS -fno-omit-frame-pointer)
if (NOT CMAKE_CXX_STANDARD)
set(CMAKE_CXX_STANDARD 17)
endif()
if (MINGW)
add_library(${PROJECT} ${OLOCO_SOURCES})
target_link_libraries(${PROJECT} winmm)
else ()
add_executable(${PROJECT} ${OLOCO_SOURCES} ${OLOCO_MM_SOURCES} ${LOCO_SECTIONS})
set_target_properties(${PROJECT} PROPERTIES LINK_FLAGS ${LOCO_SEGMENT_LINKER_FLAGS})
endif ()
target_link_libraries(${PROJECT} ${SDL2_LIBRARIES} ${SDL2_MIXER_LIBRARIES})
target_link_libraries(${PROJECT} yaml-cpp ${YAML_CPP_LIBRARIES})
target_link_libraries(${PROJECT} ${PNG_LIBRARIES})
if (NOT MINGW)
add_dependencies(${PROJECT} segfiles)
endif()
target_compile_definitions(${PROJECT} PRIVATE _NO_LOCO_WIN32_=1)
if (NOT APPLE)
target_link_libraries(${PROJECT} stdc++fs)
endif()
if (MINGW)
target_compile_definitions(${PROJECT} PRIVATE _WIN32_WINNT=0x0600 SDL_MAIN_HANDLED=1)
endif()
if (APPLE)
target_link_libraries(${PROJECT} "-framework Cocoa")
set_target_properties(${PROJECT} PROPERTIES
MACOSX_BUNDLE ON
MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/distribution/macos/Info.plist.in)
set(MACOSX_BUNDLE_BUNDLE_NAME "OpenLoco")
set(MACOSX_BUNDLE_BUNDLE_VERSION "${OPENRCT2_COMMIT_SHA1_SHORT}")
set(MACOSX_BUNDLE_COPYRIGHT "OpenLoco is licensed under the MIT License")
set(MACOSX_BUNDLE_GUI_IDENTIFIER "io.openloco.OpenLoco")
set(MACOSX_BUNDLE_ICON_FILE "AppIcon")
if(${OPENLOCO_BRANCH} EQUAL master)
set(MACOSX_BUNDLE_SHORT_VERSION_STRING "${OPENLOCO_VERSION_TAG}")
else()
set(MACOSX_BUNDLE_SHORT_VERSION_STRING "${OPENLOCO_VERSION_TAG} ${OPENLOCO_BRANCH}")
endif()
file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/distribution/macos/AppIcon.iconset DESTINATION ${CMAKE_BINARY_DIR})
set(ICON_TARGET "${CMAKE_BINARY_DIR}/AppIcon.iconset")
set(ICON_OUTPUT "${CMAKE_BINARY_DIR}/AppIcon.icns")
set(SOURCE_ICON_DIR "${CMAKE_CURRENT_SOURCE_DIR}/resources/logo")
add_custom_command(OUTPUT ${ICON_OUTPUT}
COMMAND cp icon_x16.png ${ICON_TARGET}/icon_16x16.png
COMMAND cp icon_x32.png ${ICON_TARGET}/[email protected]
COMMAND cp icon_x32.png ${ICON_TARGET}/icon_32x32.png
COMMAND cp icon_x64.png ${ICON_TARGET}/[email protected]
COMMAND cp icon_x128.png ${ICON_TARGET}/icon_128x128.png
COMMAND cp icon_x256.png ${ICON_TARGET}/[email protected]
COMMAND cp icon_x256.png ${ICON_TARGET}/icon_256x256.png
COMMAND cp icon_x512.png ${ICON_TARGET}/[email protected]
COMMAND cp icon_x512.png ${ICON_TARGET}/icon_512x512.png
COMMAND cp icon_x1024.png ${ICON_TARGET}/[email protected]
COMMAND iconutil -c icns ${ICON_TARGET}
WORKING_DIRECTORY ${SOURCE_ICON_DIR})
set(BUNDLE_RESOURCES ${ICON_OUTPUT})
list(APPEND BUNDLE_RESOURCES ${CMAKE_CURRENT_SOURCE_DIR}/CHANGELOG.md)
list(APPEND BUNDLE_RESOURCES ${CMAKE_CURRENT_SOURCE_DIR}/CONTRIBUTORS.MD)
set_target_properties(${PROJECT} PROPERTIES RESOURCE "${BUNDLE_RESOURCES}")
target_sources(${PROJECT} PUBLIC ${BUNDLE_RESOURCES})
file(GLOB BUNDLE_LANGUAGES "${CMAKE_CURRENT_SOURCE_DIR}/data/language/*")
target_sources(${PROJECT} PUBLIC ${BUNDLE_LANGUAGES})
set_property(
SOURCE ${BUNDLE_LANGUAGES}
PROPERTY MACOSX_PACKAGE_LOCATION "Resources/language"
)
endif ()
# Add headers check to verify all headers carry their dependencies.
# Only valid for Clang for now:
# - GCC 8 does not support -Wno-pragma-once-outside-header
# - Other compilers status unknown
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
add_library(${PROJECT}-headers-check OBJECT ${OLOCO_HEADERS})
set_target_properties(${PROJECT}-headers-check PROPERTIES LINKER_LANGUAGE CXX)
set_source_files_properties(${OLOCO_HEADERS} PROPERTIES LANGUAGE CXX)
add_definitions("-x c++ -Wno-pragma-once-outside-header -Wno-unused-const-variable")
get_target_property(OPENLOCO_INCLUDE_DIRS ${PROJECT} INCLUDE_DIRECTORIES)
set_target_properties(${PROJECT}-headers-check PROPERTIES INCLUDE_DIRECTORIES "${OPENLOCO_INCLUDE_DIRS}")
else ()
# Dummy target to ease invocation
add_custom_target(${PROJECT}-headers-check)
endif ()