David Snopek
GitHub
commit
ce66e6bb39
|
|
@ -12,8 +12,12 @@ CMAKE_PROJECT_<PROJECT-NAME>_INCLUDE which was introduced in version 3.17
|
|||
Scons Compatibility
|
||||
-------------------
|
||||
|
||||
There is an understandable conflict between build systems as they define
|
||||
similar concepts in different ways. When there isn't a 1:1 relationship,
|
||||
compromises need to be made to resolve those differences.
|
||||
|
||||
As we are attempting to maintain feature parity, and ease of maintenance, these
|
||||
CMake scripts are built to resemble the SCons build system.
|
||||
CMake scripts are built to resemble the SCons build system wherever possible.
|
||||
|
||||
The file structure and file content are made to match, if not in content then
|
||||
in spirit. The closer the two build systems look the easier they will be to
|
||||
|
|
@ -30,58 +34,12 @@ function is run.
|
|||
cpp_tool = Tool("godotcpp", toolpath=["tools"])
|
||||
cpp_tool.options(opts, env)
|
||||
|
||||
|
||||
The CMake equivalent is below.
|
||||
]=======================================================================]
|
||||
|
||||
include( cmake/godotcpp.cmake )
|
||||
godotcpp_options()
|
||||
|
||||
#[=======================================================================[.rst:
|
||||
|
||||
Configurations
|
||||
--------------
|
||||
|
||||
There are two build main configurations, 'Debug' and 'Release', these are not
|
||||
related to godot's DEBUG_FEATURES flag. Build configurations change the default
|
||||
compiler and linker flags present when building the library, things like debug
|
||||
symbols, optimization.
|
||||
|
||||
The Scons build scripts don't have this concept, you can think of it like the
|
||||
SCons solution has a single default configuration. In both cases overriding the
|
||||
defaults is controlled by options on the command line, or in preset files.
|
||||
|
||||
Because of this added configuration and that it can be undefined, it becomes
|
||||
important to set a default, considering the SCons solution that does not enable
|
||||
debug symbols by default, it seemed appropriate to set the default to 'Release'
|
||||
if unspecified. This can always be overridden like below.
|
||||
|
||||
.. highlight:: shell
|
||||
|
||||
cmake <source> -DCMAKE_BUILD_TYPE:STRING=Debug
|
||||
|
||||
.. caution::
|
||||
|
||||
A complication arises from `Multi-Config Generators`_ that cannot have
|
||||
their configuration set at configure time. This means that the configuration
|
||||
must be set on the build command. This is especially important for Visual
|
||||
Studio Generators which default to 'Debug'
|
||||
|
||||
.. highlight:: shell
|
||||
|
||||
cmake --build . --config Release
|
||||
|
||||
.. _Multi-Config Generators:https://cmake.org/cmake/help/latest/prop_gbl/GENERATOR_IS_MULTI_CONFIG.html
|
||||
]=======================================================================]
|
||||
get_property( IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG )
|
||||
if( NOT IS_MULTI_CONFIG AND NOT CMAKE_BUILD_TYPE )
|
||||
if( GODOT_DEV_BUILD )
|
||||
set( CMAKE_BUILD_TYPE Debug )
|
||||
else ()
|
||||
set( CMAKE_BUILD_TYPE Release )
|
||||
endif ()
|
||||
endif ()
|
||||
|
||||
#[[ Python is required for code generation ]]
|
||||
find_package(Python3 3.4 REQUIRED) # pathlib should be present
|
||||
|
||||
|
|
|
|||
|
|
@ -7,7 +7,11 @@ flags like optimization levels, warnings, and features. For platform specific
|
|||
flags look to each of the ``cmake/<platform>.cmake`` files.
|
||||
|
||||
]=======================================================================]
|
||||
#Generator Expression Helpers
|
||||
|
||||
#[[ Compiler Configuration, not to be confused with build targets ]]
|
||||
set( DEBUG_SYMBOLS "$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>" )
|
||||
|
||||
#[[ Compiler Identification ]]
|
||||
set( IS_CLANG "$<CXX_COMPILER_ID:Clang>" )
|
||||
set( IS_APPLECLANG "$<CXX_COMPILER_ID:AppleClang>" )
|
||||
set( IS_GNU "$<CXX_COMPILER_ID:GNU>" )
|
||||
|
|
@ -20,16 +24,7 @@ set( GNU_GT_V11 "$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,11>" )
|
|||
set( GNU_LT_V11 "$<VERSION_LESS:$<CXX_COMPILER_VERSION>,11>" )
|
||||
set( GNU_GE_V12 "$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,12>" )
|
||||
|
||||
set( HOT_RELOAD-UNSET "$<STREQUAL:${GODOT_USE_HOT_RELOAD},>")
|
||||
|
||||
set( DISABLE_EXCEPTIONS "$<BOOL:${GODOT_DISABLE_EXCEPTIONS}>")
|
||||
|
||||
|
||||
function( common_compiler_flags TARGET_NAME )
|
||||
set( IS_RELEASE "$<STREQUAL:${TARGET_NAME},template_release>")
|
||||
set( DEBUG_FEATURES "$<OR:$<STREQUAL:${TARGET_NAME},template_debug>,$<STREQUAL:${TARGET_NAME},editor>>" )
|
||||
set( HOT_RELOAD "$<IF:${HOT_RELOAD-UNSET},$<NOT:${IS_RELEASE}>,$<BOOL:${GODOT_USE_HOT_RELOAD}>>" )
|
||||
set( DEBUG_SYMBOLS "$<BOOL:${GODOT_DEBUG_SYMBOLS}>" )
|
||||
|
||||
target_compile_features(${TARGET_NAME}
|
||||
PUBLIC
|
||||
|
|
@ -44,24 +39,19 @@ function( common_compiler_flags TARGET_NAME )
|
|||
$<${DISABLE_EXCEPTIONS}:
|
||||
$<${NOT_MSVC}:-fno-exceptions>
|
||||
>
|
||||
$<$<NOT:${DISABLE_EXCEPTIONS}>:
|
||||
$<${IS_MSVC}:/EHsc>
|
||||
>
|
||||
|
||||
# Enabling Debug Symbols
|
||||
$<${DEBUG_SYMBOLS}:
|
||||
$<${IS_MSVC}: /Zi /FS>
|
||||
|
||||
# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
|
||||
# otherwise addr2line doesn't understand them.
|
||||
$<${NOT_MSVC}:
|
||||
-gdwarf-4
|
||||
$<IF:${IS_DEV},-g3,-g2>
|
||||
$<IF:${IS_DEV_BUILD},-g3,-g2>
|
||||
>
|
||||
>
|
||||
|
||||
$<${IS_DEV}:
|
||||
$<${NOT_MSVC}:-fno-omit-frame-pointer -O0 -g>
|
||||
$<${IS_DEV_BUILD}:
|
||||
$<${NOT_MSVC}:-fno-omit-frame-pointer -O0>
|
||||
>
|
||||
|
||||
$<${HOT_RELOAD}:
|
||||
|
|
@ -137,6 +127,8 @@ function( common_compiler_flags TARGET_NAME )
|
|||
# features
|
||||
$<${DEBUG_FEATURES}:DEBUG_ENABLED DEBUG_METHODS_ENABLED>
|
||||
|
||||
$<${IS_DEV_BUILD}:DEV_ENABLED>
|
||||
|
||||
$<${HOT_RELOAD}:HOT_RELOAD_ENABLED>
|
||||
|
||||
$<$<STREQUAL:${GODOT_PRECISION},double>:REAL_T_IS_DOUBLE>
|
||||
|
|
|
|||
|
|
@ -2,6 +2,19 @@
|
|||
godotcpp.cmake
|
||||
--------------
|
||||
|
||||
As godot-cpp is a C++ project, there are no C files, and detection of a C
|
||||
compiler is unnecessary. When CMake performs the configure process, if a
|
||||
C compiler is specified, like in a toolchain, or from an IDE, then it will
|
||||
print a warning stating that the CMAKE_C_COMPILER compiler is unused.
|
||||
This if statement simply silences that warning.
|
||||
]=======================================================================]
|
||||
if( CMAKE_C_COMPILER )
|
||||
endif ()
|
||||
|
||||
#[=======================================================================[.rst:
|
||||
Include Platform Files
|
||||
----------------------
|
||||
|
||||
Because these files are included into the top level CMakelists.txt before the
|
||||
project directive, it means that
|
||||
|
||||
|
|
@ -18,10 +31,7 @@ include( ${CMAKE_CURRENT_SOURCE_DIR}/cmake/macos.cmake)
|
|||
include( ${CMAKE_CURRENT_SOURCE_DIR}/cmake/web.cmake)
|
||||
include( ${CMAKE_CURRENT_SOURCE_DIR}/cmake/windows.cmake)
|
||||
|
||||
#Silence warning from unused CMAKE_C_COMPILER from toolchain
|
||||
if( CMAKE_C_COMPILER )
|
||||
endif ()
|
||||
|
||||
# Detect number of processors
|
||||
include(ProcessorCount)
|
||||
ProcessorCount(PROC_MAX)
|
||||
message( "Auto-detected ${PROC_MAX} CPU cores available for build parallelism." )
|
||||
|
|
@ -99,8 +109,7 @@ function( godotcpp_options )
|
|||
#TODO threads
|
||||
#TODO compiledb
|
||||
#TODO compiledb_file
|
||||
|
||||
#NOTE: build_profile's equivalent in cmake is CMakePresets.json
|
||||
#TODO build_profile
|
||||
|
||||
set(GODOT_USE_HOT_RELOAD "" CACHE BOOL
|
||||
"Enable the extra accounting required to support hot reload. (ON|OFF)")
|
||||
|
|
@ -114,17 +123,26 @@ function( godotcpp_options )
|
|||
set_property( CACHE GODOT_SYMBOL_VISIBILITY PROPERTY STRINGS "auto;visible;hidden" )
|
||||
|
||||
#TODO optimize
|
||||
#TODO debug_symbols
|
||||
option( GODOT_DEBUG_SYMBOLS "" OFF )
|
||||
|
||||
option( GODOT_DEV_BUILD "Developer build with dev-only debugging code (DEV_ENABLED)" OFF )
|
||||
|
||||
#[[ debug_symbols
|
||||
Debug symbols are enabled by using the Debug or RelWithDebInfo build configurations.
|
||||
Single Config Generator is set at configure time
|
||||
|
||||
cmake ../ -DCMAKE_BUILD_TYPE=Debug
|
||||
|
||||
Multi-Config Generator is set at build time
|
||||
|
||||
cmake --build . --config Debug
|
||||
|
||||
]]
|
||||
|
||||
# FIXME These options are not present in SCons, and perhaps should be added there.
|
||||
option( GODOT_SYSTEM_HEADERS "Expose headers as SYSTEM." OFF )
|
||||
option( GODOT_WARNING_AS_ERROR "Treat warnings as errors" OFF )
|
||||
|
||||
# Run options commands on the following to populate cache for all
|
||||
# platforms. This type of thing is typically done conditionally But as
|
||||
# scons shows all options so shall we.
|
||||
#[[ Target Platform Options ]]
|
||||
android_options()
|
||||
ios_options()
|
||||
linux_options()
|
||||
|
|
@ -136,7 +154,6 @@ endfunction()
|
|||
# Function to configure and generate the targets
|
||||
function( godotcpp_generate )
|
||||
#[[ Multi-Threaded MSVC Compilation
|
||||
|
||||
When using the MSVC compiler the build command -j <n> only specifies
|
||||
parallel jobs or targets, and not multi-threaded compilation To speed up
|
||||
compile times on msvc, the /MP <n> flag can be set. But we need to set it
|
||||
|
|
@ -157,13 +174,11 @@ function( godotcpp_generate )
|
|||
|
||||
#[[ GODOT_SYMBOL_VISIBLITY
|
||||
To match the SCons options, the allowed values are "auto", "visible", and "hidden"
|
||||
This effects the compiler flag -fvisibility=[default|internal|hidden|protected]
|
||||
The corresponding CMake option CXX_VISIBILITY_PRESET accepts the compiler values.
|
||||
This effects the compiler flag_ -fvisibility=[default|internal|hidden|protected]
|
||||
The corresponding target option CXX_VISIBILITY_PRESET accepts the compiler values.
|
||||
|
||||
TODO: It is probably worth a pull request which changes both to use the compiler values
|
||||
https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-fvisibility
|
||||
|
||||
This performs the necessary conversion
|
||||
.. _flag:https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-fvisibility
|
||||
]]
|
||||
if( ${GODOT_SYMBOL_VISIBILITY} STREQUAL "auto" OR ${GODOT_SYMBOL_VISIBILITY} STREQUAL "visible" )
|
||||
set( GODOT_SYMBOL_VISIBILITY "default" )
|
||||
|
|
@ -230,14 +245,29 @@ function( godotcpp_generate )
|
|||
godot_arch_map( SYSTEM_ARCH ${CMAKE_SYSTEM_PROCESSOR} )
|
||||
endif()
|
||||
|
||||
# Transform options into generator expressions
|
||||
set( HOT_RELOAD-UNSET "$<STREQUAL:${GODOT_USE_HOT_RELOAD},>")
|
||||
|
||||
set( DISABLE_EXCEPTIONS "$<BOOL:${GODOT_DISABLE_EXCEPTIONS}>")
|
||||
|
||||
# GODOT_DEV_BUILD
|
||||
set( RELEASE_TYPES "Release;MinSizeRel")
|
||||
get_property( IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG )
|
||||
if( IS_MULTI_CONFIG )
|
||||
message( NOTICE "=> Default build type is Debug. For other build types add --config <type> to build command")
|
||||
elseif( GODOT_DEV_BUILD AND CMAKE_BUILD_TYPE IN_LIST RELEASE_TYPES )
|
||||
message( WARNING "=> GODOT_DEV_BUILD implies a Debug-like build but CMAKE_BUILD_TYPE is '${CMAKE_BUILD_TYPE}'")
|
||||
endif ()
|
||||
set( IS_DEV_BUILD "$<BOOL:${GODOT_DEV_BUILD}>")
|
||||
# The .dev portion of the name if GODOT_DEV_BUILD is true.
|
||||
set( DEV_TAG "$<${IS_DEV_BUILD}:.dev>" )
|
||||
|
||||
### Define our godot-cpp library targets
|
||||
foreach ( TARGET_NAME template_debug template_release editor )
|
||||
|
||||
# Useful genex snippits used in subsequent genex's
|
||||
set( IS_RELEASE "$<STREQUAL:${TARGET_NAME},template_release>")
|
||||
set( IS_DEV "$<BOOL:${GODOT_DEV_BUILD}>")
|
||||
set( DEBUG_FEATURES "$<OR:$<STREQUAL:${TARGET_NAME},template_debug>,$<STREQUAL:${TARGET_NAME},editor>>" )
|
||||
set( HOT_RELOAD "$<IF:${HOT_RELOAD-UNSET},$<NOT:${IS_RELEASE}>,$<BOOL:${GODOT_USE_HOT_RELOAD}>>" )
|
||||
# Generator Expressions that rely on the target
|
||||
set( DEBUG_FEATURES "$<NOT:$<STREQUAL:${TARGET_NAME},template_release>>" )
|
||||
set( HOT_RELOAD "$<IF:${HOT_RELOAD-UNSET},${DEBUG_FEATURES},$<BOOL:${GODOT_USE_HOT_RELOAD}>>" )
|
||||
|
||||
# the godot-cpp.* library targets
|
||||
add_library( ${TARGET_NAME} STATIC EXCLUDE_FROM_ALL )
|
||||
|
|
@ -268,7 +298,7 @@ function( godotcpp_generate )
|
|||
BUILD_RPATH_USE_ORIGIN ON
|
||||
|
||||
PREFIX lib
|
||||
OUTPUT_NAME "${PROJECT_NAME}.${SYSTEM_NAME}.${TARGET_NAME}.${SYSTEM_ARCH}"
|
||||
OUTPUT_NAME "${PROJECT_NAME}.${SYSTEM_NAME}.${TARGET_NAME}${DEV_TAG}.${SYSTEM_ARCH}"
|
||||
ARCHIVE_OUTPUT_DIRECTORY "$<1:${CMAKE_BINARY_DIR}/bin>"
|
||||
|
||||
# Things that are handy to know for dependent targets
|
||||
|
|
|
|||
|
|
@ -59,11 +59,7 @@ endfunction()
|
|||
|
||||
#[===========================[ Target Generation ]===========================]
|
||||
function( windows_generate TARGET_NAME )
|
||||
set( IS_MSVC "$<CXX_COMPILER_ID:MSVC>" )
|
||||
set( IS_CLANG "$<OR:$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:Clang>>" )
|
||||
set( NOT_MSVC "$<NOT:${IS_MSVC}>" )
|
||||
set( STATIC_CPP "$<BOOL:${GODOT_USE_STATIC_CPP}>")
|
||||
set( DISABLE_EXCEPTIONS "$<BOOL:${GODOT_DISABLE_EXCEPTIONS}>")
|
||||
set( DEBUG_CRT "$<BOOL:${GODOT_DEBUG_CRT}>" )
|
||||
|
||||
set_target_properties( ${TARGET_NAME}
|
||||
|
|
|
|||
|
|
@ -24,6 +24,20 @@ Configuration examples are listed at the bottom of the page.
|
|||
|
||||
.. _godot-cpp-template: https://github.com/godotengine/godot-cpp-template
|
||||
|
||||
SCons Deviations
|
||||
----------------
|
||||
|
||||
Not everything from SCons can be perfectly representable in CMake, here are
|
||||
the notable differences.
|
||||
|
||||
- debug_symbols
|
||||
No longer has an explicit option, and is enabled via Debug-like CMake
|
||||
build configurations; Debug, RelWithDebInfo.
|
||||
|
||||
- dev_build
|
||||
Does not define NDEBUG when disabled, NDEBUG is set via Release-like
|
||||
CMake build configurations; Release, MinSizeRel.
|
||||
|
||||
Basic walkthrough
|
||||
-----------------
|
||||
|
||||
|
|
|
|||
|
|
@ -26,6 +26,7 @@ get_target_property( GODOT_TARGET godot-cpp::${TEST_TARGET} GODOT_TARGET )
|
|||
get_target_property( GODOT_ARCH godot-cpp::${TEST_TARGET} GODOT_ARCH )
|
||||
|
||||
set( OUTPUT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/project/bin/" )
|
||||
set( DEV_TAG "$<$<BOOL:${GODOT_DEV_BUILD}>:.dev>" )
|
||||
|
||||
set_target_properties( godot-cpp-test
|
||||
PROPERTIES
|
||||
|
|
@ -45,7 +46,7 @@ set_target_properties( godot-cpp-test
|
|||
PDB_OUTPUT_DIRECTORY "$<1:${OUTPUT_DIR}>" #MSVC Only, ignored on other platforms
|
||||
|
||||
PREFIX "lib"
|
||||
OUTPUT_NAME "gdexample.${GODOT_PLATFORM}.${GODOT_TARGET}.${GODOT_ARCH}"
|
||||
OUTPUT_NAME "gdexample.${GODOT_PLATFORM}.${GODOT_TARGET}${DEV_TAG}.${GODOT_ARCH}"
|
||||
)
|
||||
|
||||
if( CMAKE_SYSTEM_NAME STREQUAL Darwin )
|
||||
|
|
@ -58,7 +59,7 @@ if( CMAKE_SYSTEM_NAME STREQUAL Darwin )
|
|||
LIBRARY_OUTPUT_DIRECTORY "$<1:${OUTPUT_DIR}>"
|
||||
RUNTIME_OUTPUT_DIRECTORY "$<1:${OUTPUT_DIR}>"
|
||||
|
||||
OUTPUT_NAME "gdexample.macos.${TEST_TARGET}"
|
||||
OUTPUT_NAME "gdexample.macos.${TEST_TARGET}${DEV_TAG}"
|
||||
SUFFIX ""
|
||||
|
||||
#macos options
|
||||
|
|
|
|||
Loading…
Reference in New Issue