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godot-cpp/CMakeLists.txt
Andy Maloney 1351710a18 {cmake} Add GODOT_CPP_SYSTEM_HEADERS option to mark includes as SYSTEM 
From the cmake docs:

"This may have effects such as suppressing warnings or skipping the contained headers in dependency calculations (see compiler documentation). Additionally, system include directories are searched after normal include directories regardless of the order specified."

Addresses part of #999
2023-01-18 21:15:34 -05:00

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CMake
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# cmake arguments
# CMAKE_BUILD_TYPE: Compilation target (Debug or Release defaults to Debug)
#
# godot-cpp cmake arguments
# GODOT_GDEXTENSION_DIR: Path to the directory containing GDExtension interface header and API JSON file
# GODOT_CPP_SYSTEM_HEADERS Mark the header files as SYSTEM. This may be useful to supress warnings in projects including this one.
# GODOT_CUSTOM_API_FILE: Path to a custom GDExtension API JSON file (takes precedence over `gdextension_dir`)
# FLOAT_PRECISION: Floating-point precision level ("single", "double")
#
# Android cmake arguments
# CMAKE_TOOLCHAIN_FILE: The path to the android cmake toolchain ($ANDROID_NDK/build/cmake/android.toolchain.cmake)
# ANDROID_NDK: The path to the android ndk root folder
# ANDROID_TOOLCHAIN_NAME: The android toolchain (arm-linux-androideabi-4.9 or aarch64-linux-android-4.9 or x86-4.9 or x86_64-4.9)
# ANDROID_PLATFORM: The android platform version (android-23)
# More info here: https://godot.readthedocs.io/en/latest/development/compiling/compiling_for_android.html
#
# Examples
#
# Builds a debug version:
# cmake .
# cmake --build .
#
# Builds a release version with clang
# CC=/usr/bin/clang CXX=/usr/bin/clang++ cmake -DCMAKE_BUILD_TYPE=Release -G "Unix Makefiles" .
# cmake --build .
#
# Builds an android armeabi-v7a debug version:
# cmake -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK/build/cmake/android.toolchain.cmake -DANDROID_NDK=$ANDROID_NDK \
# -DANDROID_TOOLCHAIN_NAME=arm-linux-androideabi-4.9 -DANDROID_PLATFORM=android-23 -DCMAKE_BUILD_TYPE=Debug .
# cmake --build .
#
# Protip
# Generate the buildfiles in a sub directory to not clutter the root directory with build files:
# mkdir build && cd build && cmake -G "Unix Makefiles" .. && cmake --build .
#
# Todo
# Test build for Windows, Mac and mingw.
project(godot-cpp LANGUAGES CXX)
cmake_minimum_required(VERSION 3.12)
option(GENERATE_TEMPLATE_GET_NODE "Generate a template version of the Node class's get_node." ON)
option(GODOT_CPP_SYSTEM_HEADERS "Expose headers as SYSTEM." OFF)
# Default build type is Debug in the SConstruct
if("${CMAKE_BUILD_TYPE}" STREQUAL "")
set(CMAKE_BUILD_TYPE Debug)
endif()
if(NOT DEFINED BITS)
set(BITS 32)
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(BITS 64)
endif(CMAKE_SIZEOF_VOID_P EQUAL 8)
endif()
# Input from user for GDExtension interface header and the API JSON file
set(GODOT_GDEXTENSION_DIR "gdextension" CACHE STRING "")
set(GODOT_CUSTOM_API_FILE "" CACHE STRING "")
set(FLOAT_PRECISION "single" CACHE STRING "")
if ("${FLOAT_PRECISION}" STREQUAL "double")
add_definitions(-DREAL_T_IS_DOUBLE)
endif()
set(GODOT_GDEXTENSION_API_FILE "${GODOT_GDEXTENSION_DIR}/extension_api.json")
if (NOT "${GODOT_CUSTOM_API_FILE}" STREQUAL "") # User-defined override.
set(GODOT_GDEXTENSION_API_FILE "${GODOT_CUSTOM_API_FILE}")
endif()
set(GODOT_COMPILE_FLAGS )
set(GODOT_LINKER_FLAGS )
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
# using Visual Studio C++
set(GODOT_COMPILE_FLAGS "/EHsc /WX") # /GF /MP
if(CMAKE_BUILD_TYPE MATCHES Debug)
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /MDd") # /Od /RTC1 /Zi
else()
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /MD /O2") # /Oy /GL /Gy
STRING(REGEX REPLACE "/RTC(su|[1su])" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
string(REPLACE "/RTC1" "" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
endif(CMAKE_BUILD_TYPE MATCHES Debug)
# Disable conversion warning, truncation, unreferenced var, signed mismatch, different type
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} /wd4244 /wd4305 /wd4101 /wd4018 /wd4267 /wd4099")
add_definitions(-DNOMINMAX)
# Unkomment for warning level 4
#if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
# string(REGEX REPLACE "/W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
#endif()
else() # GCC/Clang
set(GODOT_LINKER_FLAGS "-static-libgcc -static-libstdc++ -Wl,-R,'$$ORIGIN'")
if(NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
set(GODOT_COMPILE_FLAGS "-fPIC")
endif()
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -g -Wwrite-strings")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wchar-subscripts -Wcomment -Wdisabled-optimization")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wformat -Wformat=2 -Wformat-security -Wformat-y2k")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wimport -Winit-self -Winline -Winvalid-pch")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wmissing-braces -Wmissing-format-attribute")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wmissing-include-dirs -Wmissing-noreturn -Wpacked -Wpointer-arith")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wredundant-decls -Wreturn-type -Wsequence-point")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wswitch -Wswitch-enum -Wtrigraphs")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wuninitialized -Wunknown-pragmas -Wunreachable-code -Wunused-label")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wunused-value -Wvariadic-macros -Wvolatile-register-var -Wno-error=attributes")
# -Wshadow -Wextra -Wall -Weffc++ -Wfloat-equal -Wstack-protector -Wunused-parameter -Wsign-compare -Wunused-variable -Wcast-align
# -Wunused-function -Wstrict-aliasing -Wstrict-aliasing=2 -Wmissing-field-initializers
if(NOT CMAKE_SYSTEM_NAME STREQUAL "Android")
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -Wno-ignored-attributes")
endif()
if(CMAKE_BUILD_TYPE MATCHES Debug)
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0")
else()
set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -O3")
endif(CMAKE_BUILD_TYPE MATCHES Debug)
endif()
# Generate source from the bindings file
find_package(Python3 3.4 REQUIRED) # pathlib should be present
if(GENERATE_TEMPLATE_GET_NODE)
set(GENERATE_BINDING_PARAMETERS "True")
else()
set(GENERATE_BINDING_PARAMETERS "False")
endif()
execute_process(COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.print_file_list(\"${GODOT_GDEXTENSION_API_FILE}\", \"${CMAKE_CURRENT_BINARY_DIR}\", headers=True, sources=True)"
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
OUTPUT_VARIABLE GENERATED_FILES_LIST
)
add_custom_command(OUTPUT ${GENERATED_FILES_LIST}
COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.generate_bindings(\"${GODOT_GDEXTENSION_API_FILE}\", \"${GENERATE_BINDING_PARAMETERS}\", \"${BITS}\", \"${FLOAT_PRECISION}\", \"${CMAKE_CURRENT_BINARY_DIR}\")"
VERBATIM
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
MAIN_DEPENDENCY ${GODOT_GDEXTENSION_API_FILE}
DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/binding_generator.py
COMMENT "Generating bindings"
)
# Get Sources
file(GLOB_RECURSE SOURCES CONFIGURE_DEPENDS src/*.c**)
file(GLOB_RECURSE HEADERS CONFIGURE_DEPENDS include/*.h**)
# Define our godot-cpp library
add_library(${PROJECT_NAME}
${SOURCES}
${HEADERS}
${GENERATED_FILES_LIST}
)
add_library(godot::cpp ALIAS ${PROJECT_NAME})
target_compile_features(${PROJECT_NAME}
PRIVATE
cxx_std_17
)
target_compile_definitions(${PROJECT_NAME} PUBLIC
$<$<CONFIG:Debug>:DEBUG_ENABLED>
$<$<CONFIG:Debug>:DEBUG_METHODS_ENABLED>
)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
target_compile_definitions(${PROJECT_NAME} PUBLIC TYPED_METHOD_BIND)
endif()
# Optionally mark headers as SYSTEM
set(GODOT_CPP_SYSTEM_HEADERS_ATTRIBUTE "")
if (GODOT_CPP_SYSTEM_HEADERS)
set(GODOT_CPP_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
endif ()
target_include_directories(${PROJECT_NAME} ${GODOT_CPP_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
include
${CMAKE_CURRENT_BINARY_DIR}/gen/include
)
unset( GODOT_CPP_SYSTEM_HEADERS_ATTRIBUTE )
# Put godot headers as SYSTEM PUBLIC to exclude warnings from irrelevant headers
target_include_directories(${PROJECT_NAME}
SYSTEM PUBLIC
${GODOT_GDEXTENSION_DIR}
)
# Add the compile flags
set_property(TARGET ${PROJECT_NAME} APPEND_STRING PROPERTY COMPILE_FLAGS ${GODOT_COMPILE_FLAGS})
set_property(TARGET ${PROJECT_NAME} APPEND_STRING PROPERTY LINK_FLAGS ${GODOT_LINKER_FLAGS})
# Create the correct name (godot.os.build_type.system_bits)
string(TOLOWER "${CMAKE_SYSTEM_NAME}" SYSTEM_NAME)
string(TOLOWER "${CMAKE_BUILD_TYPE}" BUILD_TYPE)
if(ANDROID)
# Added the android abi after system name
set(SYSTEM_NAME ${SYSTEM_NAME}.${ANDROID_ABI})
# Android does not have the bits at the end if you look at the main godot repo build
set(OUTPUT_NAME "godot-cpp.${SYSTEM_NAME}.${BUILD_TYPE}")
else()
set(OUTPUT_NAME "godot-cpp.${SYSTEM_NAME}.${BUILD_TYPE}.${BITS}")
endif()
set_target_properties(${PROJECT_NAME}
PROPERTIES
CXX_EXTENSIONS OFF
ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin"
LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin"
RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin"
OUTPUT_NAME "${OUTPUT_NAME}"
)
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