269b115d9c
Upon investigating the extremely slow MSVC build times in #80513, I noticed
that while Godot policy is to never use exceptions, we weren't enforcing it
with compiler flags, and thus still included exception handling code and
stack unwinding.
This is wasteful on multiple aspects:
- Binary size: Around 20% binary size reduction with exceptions disabled
for both MSVC and GCC binaries.
- Compile time:
* More than 50% build time reduction with MSVC.
* 10% to 25% build time reduction with GCC + LTO.
- Performance: Possibly, needs to be benchmarked.
Since users may want to re-enable exceptions in their own thirdparty code
or the libraries they compile with Godot, this behavior can be toggled with
the `disable_exceptions` SCons option, which defaults to true.
(cherry picked from commit 3907e53ff6)
121 lines
5.3 KiB
Python
121 lines
5.3 KiB
Python
#!/usr/bin/env python
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Import("env")
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Import("env_modules")
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env_openxr = env_modules.Clone()
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# Thirdparty source files
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thirdparty_obj = []
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# Khronos OpenXR loader
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# Needs even for build against shared library, at least the defines used in public headers.
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if env["platform"] == "android":
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# may need to set OPENXR_ANDROID_VERSION_SUFFIX
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env_openxr.AppendUnique(CPPDEFINES=["XR_OS_ANDROID", "XR_USE_PLATFORM_ANDROID"])
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env_openxr.AppendUnique(CPPDEFINES=["JSON_USE_EXCEPTION=0"])
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# may need to include java parts of the openxr loader
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elif env["platform"] == "linuxbsd":
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env_openxr.AppendUnique(CPPDEFINES=["XR_OS_LINUX"])
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if env["x11"]:
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env_openxr.AppendUnique(CPPDEFINES=["XR_USE_PLATFORM_XLIB"])
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# FIXME: Review what needs to be set for Android and macOS.
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env_openxr.AppendUnique(CPPDEFINES=["HAVE_SECURE_GETENV"])
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elif env["platform"] == "windows":
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env_openxr.AppendUnique(CPPDEFINES=["XR_OS_WINDOWS", "NOMINMAX", "XR_USE_PLATFORM_WIN32"])
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# may need to check and set:
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# - XR_USE_TIMESPEC
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if env["builtin_openxr"]:
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thirdparty_dir = "#thirdparty/openxr"
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env_openxr.Prepend(
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CPPPATH=[
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thirdparty_dir,
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thirdparty_dir + "/include",
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thirdparty_dir + "/src",
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thirdparty_dir + "/src/common",
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thirdparty_dir + "/src/external/jsoncpp/include",
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]
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)
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env_thirdparty = env_openxr.Clone()
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env_thirdparty.disable_warnings()
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env_thirdparty.AppendUnique(CPPDEFINES=["DISABLE_STD_FILESYSTEM"])
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if env["disable_exceptions"]:
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env_thirdparty.AppendUnique(CPPDEFINES=["XRLOADER_DISABLE_EXCEPTION_HANDLING", ("JSON_USE_EXCEPTION", 0)])
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env_thirdparty.Append(CPPPATH=[thirdparty_dir + "/src/loader"])
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# add in external jsoncpp dependency
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thirdparty_jsoncpp_dir = thirdparty_dir + "/src/external/jsoncpp/src/lib_json/"
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env_thirdparty.add_source_files(thirdparty_obj, thirdparty_jsoncpp_dir + "json_reader.cpp")
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env_thirdparty.add_source_files(thirdparty_obj, thirdparty_jsoncpp_dir + "json_value.cpp")
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env_thirdparty.add_source_files(thirdparty_obj, thirdparty_jsoncpp_dir + "json_writer.cpp")
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# add in load
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if env["platform"] != "android":
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# On Android the openxr_loader is provided by separate plugins for each device
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# Build the engine using object files
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khrloader_obj = []
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/xr_generated_dispatch_table.c")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/common/filesystem_utils.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/common/object_info.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/api_layer_interface.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/loader_core.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/loader_instance.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/loader_logger_recorders.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/loader_logger.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/manifest_file.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/runtime_interface.cpp")
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env_thirdparty.add_source_files(khrloader_obj, thirdparty_dir + "/src/loader/xr_generated_loader.cpp")
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env.modules_sources += khrloader_obj
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env.modules_sources += thirdparty_obj
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# Godot source files
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module_obj = []
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env_openxr.add_source_files(module_obj, "*.cpp")
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env_openxr.add_source_files(module_obj, "action_map/*.cpp")
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env_openxr.add_source_files(module_obj, "scene/*.cpp")
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# We're a little more targeted with our extensions
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if env["platform"] == "android":
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env_openxr.add_source_files(module_obj, "extensions/openxr_android_extension.cpp")
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if env["vulkan"]:
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env_openxr.add_source_files(module_obj, "extensions/openxr_vulkan_extension.cpp")
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if env["opengl3"]:
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env_openxr.add_source_files(module_obj, "extensions/openxr_opengl_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_palm_pose_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_composition_layer_depth_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_htc_controller_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_htc_vive_tracker_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_huawei_controller_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_hand_tracking_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_fb_passthrough_extension_wrapper.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_fb_display_refresh_rate_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_pico_controller_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_wmr_controller_extension.cpp")
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env_openxr.add_source_files(module_obj, "extensions/openxr_ml2_controller_extension.cpp")
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env.modules_sources += module_obj
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if env.editor_build:
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SConscript("editor/SCsub")
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# Needed to force rebuilding the module files when the thirdparty library is updated.
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env.Depends(module_obj, thirdparty_obj)
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