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SConstruct
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#!/usr/bin/env python
from misc.utility.scons_hints import *
EnsureSConsVersion(4, 0)
EnsurePythonVersion(3, 8)
# System
import glob
import os
import pickle
import sys
from collections import OrderedDict
from importlib.util import module_from_spec, spec_from_file_location
from types import ModuleType
from SCons import __version__ as scons_raw_version
from SCons.Builder import ListEmitter
# Explicitly resolve the helper modules, this is done to avoid clash with
# modules of the same name that might be randomly added (e.g. someone adding
# an `editor.py` file at the root of the module creates a clash with the editor
# folder when doing `import editor.template_builder`)
def _helper_module(name, path):
spec = spec_from_file_location(name, path)
module = module_from_spec(spec)
spec.loader.exec_module(module)
sys.modules[name] = module
# Ensure the module's parents are in loaded to avoid loading the wrong parent
# when doing "import foo.bar" while only "foo.bar" as declared as helper module
child_module = module
parent_name = name
while True:
try:
parent_name, child_name = parent_name.rsplit(".", 1)
except ValueError:
break
try:
parent_module = sys.modules[parent_name]
except KeyError:
parent_module = ModuleType(parent_name)
sys.modules[parent_name] = parent_module
setattr(parent_module, child_name, child_module)
_helper_module("gles3_builders", "gles3_builders.py")
_helper_module("glsl_builders", "glsl_builders.py")
_helper_module("methods", "methods.py")
_helper_module("platform_methods", "platform_methods.py")
_helper_module("version", "version.py")
_helper_module("core.core_builders", "core/core_builders.py")
_helper_module("main.main_builders", "main/main_builders.py")
_helper_module("misc.utility.color", "misc/utility/color.py")
# Local
import gles3_builders
import glsl_builders
import methods
import scu_builders
from misc.utility.color import is_stderr_color, print_error, print_info, print_warning
from platform_methods import architecture_aliases, architectures, compatibility_platform_aliases
if ARGUMENTS.get("target", "editor") == "editor":
_helper_module("editor.editor_builders", "editor/editor_builders.py")
_helper_module("editor.template_builders", "editor/template_builders.py")
# Scan possible build platforms
platform_list = [] # list of platforms
platform_opts = {} # options for each platform
platform_flags = {} # flags for each platform
platform_doc_class_path = {}
platform_exporters = []
platform_apis = []
for x in sorted(glob.glob("platform/*")):
if not os.path.isdir(x) or not os.path.exists(x + "/detect.py"):
continue
tmppath = "./" + x
sys.path.insert(0, tmppath)
import detect
# Get doc classes paths (if present)
try:
doc_classes = detect.get_doc_classes()
doc_path = detect.get_doc_path()
for c in doc_classes:
platform_doc_class_path[c] = x.replace("\\", "/") + "/" + doc_path
except Exception:
pass
platform_name = x[9:]
if os.path.exists(x + "/export/export.cpp"):
platform_exporters.append(platform_name)
if os.path.exists(x + "/api/api.cpp"):
platform_apis.append(platform_name)
if detect.can_build():
x = x.replace("platform/", "") # rest of world
x = x.replace("platform\\", "") # win32
platform_list += [x]
platform_opts[x] = detect.get_opts()
platform_flags[x] = detect.get_flags()
if isinstance(platform_flags[x], list): # backwards compatibility
platform_flags[x] = {flag[0]: flag[1] for flag in platform_flags[x]}
sys.path.remove(tmppath)
sys.modules.pop("detect")
# We let SCons build its default ENV as it includes OS-specific things which we don't
# want to have to pull in manually. However we enforce no "tools", which we register
# further down after parsing our platform-specific configuration.
# Then we prepend PATH to make it take precedence, while preserving SCons' own entries.
env = Environment(tools=[])
env.PrependENVPath("PATH", os.getenv("PATH"))
env.PrependENVPath("PKG_CONFIG_PATH", os.getenv("PKG_CONFIG_PATH"))
if "TERM" in os.environ: # Used for colored output.
env["ENV"]["TERM"] = os.environ["TERM"]
env.disabled_modules = set()
env.module_version_string = ""
env.msvc = False
env.scons_version = env._get_major_minor_revision(scons_raw_version)
env.__class__.add_module_version_string = methods.add_module_version_string
env.__class__.add_source_files = methods.add_source_files
env.__class__.use_windows_spawn_fix = methods.use_windows_spawn_fix
env.__class__.add_shared_library = methods.add_shared_library
env.__class__.add_library = methods.add_library
env.__class__.add_program = methods.add_program
env.__class__.CommandNoCache = methods.CommandNoCache
env.__class__.Run = methods.Run
env.__class__.disable_warnings = methods.disable_warnings
env.__class__.force_optimization_on_debug = methods.force_optimization_on_debug
env.__class__.module_add_dependencies = methods.module_add_dependencies
env.__class__.module_check_dependencies = methods.module_check_dependencies
env["x86_libtheora_opt_gcc"] = False
env["x86_libtheora_opt_vc"] = False
# avoid issues when building with different versions of python out of the same directory
env.SConsignFile(File("#.sconsign{0}.dblite".format(pickle.HIGHEST_PROTOCOL)).abspath)
# Build options
customs = ["custom.py"]
profile = ARGUMENTS.get("profile", "")
if profile:
if os.path.isfile(profile):
customs.append(profile)
elif os.path.isfile(profile + ".py"):
customs.append(profile + ".py")
opts = Variables(customs, ARGUMENTS)
# Target build options
opts.Add((["platform", "p"], "Target platform (%s)" % "|".join(platform_list), ""))
opts.Add(EnumVariable("target", "Compilation target", "editor", ("editor", "template_release", "template_debug")))
opts.Add(EnumVariable("arch", "CPU architecture", "auto", ["auto"] + architectures, architecture_aliases))
opts.Add(BoolVariable("dev_build", "Developer build with dev-only debugging code (DEV_ENABLED)", False))
opts.Add(
EnumVariable(
"optimize",
"Optimization level (by default inferred from 'target' and 'dev_build')",
"auto",
("auto", "none", "custom", "debug", "speed", "speed_trace", "size", "size_extra"),
)
)
opts.Add(BoolVariable("debug_symbols", "Build with debugging symbols", False))
opts.Add(BoolVariable("separate_debug_symbols", "Extract debugging symbols to a separate file", False))
opts.Add(BoolVariable("debug_paths_relative", "Make file paths in debug symbols relative (if supported)", False))
opts.Add(EnumVariable("lto", "Link-time optimization (production builds)", "none", ("none", "auto", "thin", "full")))
opts.Add(BoolVariable("production", "Set defaults to build Godot for use in production", False))
opts.Add(BoolVariable("threads", "Enable threading support", True))
# Components
opts.Add(BoolVariable("deprecated", "Enable compatibility code for deprecated and removed features", True))
opts.Add(EnumVariable("precision", "Set the floating-point precision level", "single", ("single", "double")))
opts.Add(BoolVariable("minizip", "Enable ZIP archive support using minizip", True))
opts.Add(BoolVariable("brotli", "Enable Brotli for decompression and WOFF2 fonts support", True))
opts.Add(BoolVariable("xaudio2", "Enable the XAudio2 audio driver on supported platforms", False))
opts.Add(BoolVariable("vulkan", "Enable the vulkan rendering driver", True))
opts.Add(BoolVariable("opengl3", "Enable the OpenGL/GLES3 rendering driver", True))
opts.Add(BoolVariable("d3d12", "Enable the Direct3D 12 rendering driver on supported platforms", False))
opts.Add(BoolVariable("metal", "Enable the Metal rendering driver on supported platforms (Apple arm64 only)", False))
opts.Add(BoolVariable("use_volk", "Use the volk library to load the Vulkan loader dynamically", True))
opts.Add(BoolVariable("disable_exceptions", "Force disabling exception handling code", True))
opts.Add("custom_modules", "A list of comma-separated directory paths containing custom modules to build.", "")
opts.Add(BoolVariable("custom_modules_recursive", "Detect custom modules recursively for each specified path.", True))
# Advanced options
opts.Add(
BoolVariable(
"dev_mode", "Alias for dev options: verbose=yes warnings=extra werror=yes tests=yes strict_checks=yes", False
)
)
opts.Add(BoolVariable("tests", "Build the unit tests", False))
opts.Add(BoolVariable("fast_unsafe", "Enable unsafe options for faster rebuilds", False))
opts.Add(BoolVariable("ninja", "Use the ninja backend for faster rebuilds", False))
opts.Add(BoolVariable("ninja_auto_run", "Run ninja automatically after generating the ninja file", True))
opts.Add("ninja_file", "Path to the generated ninja file", "build.ninja")
opts.Add(BoolVariable("compiledb", "Generate compilation DB (`compile_commands.json`) for external tools", False))
opts.Add(
"num_jobs",
"Use up to N jobs when compiling (equivalent to `-j N`). Defaults to max jobs - 1. Ignored if -j is used.",
"",
)
opts.Add(BoolVariable("verbose", "Enable verbose output for the compilation", False))
opts.Add(BoolVariable("progress", "Show a progress indicator during compilation", True))
opts.Add(EnumVariable("warnings", "Level of compilation warnings", "all", ("extra", "all", "moderate", "no")))
opts.Add(BoolVariable("werror", "Treat compiler warnings as errors", False))
opts.Add("extra_suffix", "Custom extra suffix added to the base filename of all generated binary files", "")
opts.Add("object_prefix", "Custom prefix added to the base filename of all generated object files", "")
opts.Add(BoolVariable("vsproj", "Generate a Visual Studio solution", False))
opts.Add("vsproj_name", "Name of the Visual Studio solution", "godot")
opts.Add("import_env_vars", "A comma-separated list of environment variables to copy from the outer environment.", "")
opts.Add(BoolVariable("disable_3d", "Disable 3D nodes for a smaller executable", False))
opts.Add(BoolVariable("disable_advanced_gui", "Disable advanced GUI nodes and behaviors", False))
opts.Add(BoolVariable("disable_physics_2d", "Disable 2D physics nodes and server", False))
opts.Add(BoolVariable("disable_physics_3d", "Disable 3D physics nodes and server", False))
opts.Add(BoolVariable("disable_xr", "Disable XR nodes and server", False))
opts.Add("build_profile", "Path to a file containing a feature build profile", "")
opts.Add(BoolVariable("modules_enabled_by_default", "If no, disable all modules except ones explicitly enabled", True))
opts.Add(BoolVariable("no_editor_splash", "Don't use the custom splash screen for the editor", True))
opts.Add(
"system_certs_path",
"Use this path as TLS certificates default for editor and Linux/BSD export templates (for package maintainers)",
"",
)
opts.Add(BoolVariable("use_precise_math_checks", "Math checks use very precise epsilon (debug option)", False))
opts.Add(BoolVariable("strict_checks", "Enforce stricter checks (debug option)", False))
opts.Add(BoolVariable("scu_build", "Use single compilation unit build", False))
opts.Add("scu_limit", "Max includes per SCU file when using scu_build (determines RAM use)", "0")
opts.Add(BoolVariable("engine_update_check", "Enable engine update checks in the Project Manager", True))
opts.Add(BoolVariable("steamapi", "Enable minimal SteamAPI integration for usage time tracking (editor only)", False))
opts.Add("cache_path", "Path to a directory where SCons cache files will be stored. No value disables the cache.", "")
opts.Add("cache_limit", "Max size (in GiB) for the SCons cache. 0 means no limit.", "0")
opts.Add(
BoolVariable(
"redirect_build_objects",
"Enable redirecting built objects/libraries to `bin/obj/` to declutter the repository.",
True,
)
)
# Thirdparty libraries
opts.Add(BoolVariable("builtin_brotli", "Use the built-in Brotli library", True))
opts.Add(BoolVariable("builtin_certs", "Use the built-in SSL certificates bundles", True))
opts.Add(BoolVariable("builtin_clipper2", "Use the built-in Clipper2 library", True))
opts.Add(BoolVariable("builtin_embree", "Use the built-in Embree library", True))
opts.Add(BoolVariable("builtin_enet", "Use the built-in ENet library", True))
opts.Add(BoolVariable("builtin_freetype", "Use the built-in FreeType library", True))
opts.Add(BoolVariable("builtin_msdfgen", "Use the built-in MSDFgen library", True))
opts.Add(BoolVariable("builtin_glslang", "Use the built-in glslang library", True))
opts.Add(BoolVariable("builtin_graphite", "Use the built-in Graphite library", True))
opts.Add(BoolVariable("builtin_harfbuzz", "Use the built-in HarfBuzz library", True))
opts.Add(BoolVariable("builtin_icu4c", "Use the built-in ICU library", True))
opts.Add(BoolVariable("builtin_libogg", "Use the built-in libogg library", True))
opts.Add(BoolVariable("builtin_libpng", "Use the built-in libpng library", True))
opts.Add(BoolVariable("builtin_libtheora", "Use the built-in libtheora library", True))
opts.Add(BoolVariable("builtin_libvorbis", "Use the built-in libvorbis library", True))
opts.Add(BoolVariable("builtin_libwebp", "Use the built-in libwebp library", True))
opts.Add(BoolVariable("builtin_wslay", "Use the built-in wslay library", True))
opts.Add(BoolVariable("builtin_mbedtls", "Use the built-in mbedTLS library", True))
opts.Add(BoolVariable("builtin_miniupnpc", "Use the built-in miniupnpc library", True))
opts.Add(BoolVariable("builtin_openxr", "Use the built-in OpenXR library", True))
opts.Add(BoolVariable("builtin_pcre2", "Use the built-in PCRE2 library", True))
opts.Add(BoolVariable("builtin_pcre2_with_jit", "Use JIT compiler for the built-in PCRE2 library", True))
opts.Add(BoolVariable("builtin_recastnavigation", "Use the built-in Recast navigation library", True))
opts.Add(BoolVariable("builtin_rvo2_2d", "Use the built-in RVO2 2D library", True))
opts.Add(BoolVariable("builtin_rvo2_3d", "Use the built-in RVO2 3D library", True))
opts.Add(BoolVariable("builtin_xatlas", "Use the built-in xatlas library", True))
opts.Add(BoolVariable("builtin_zlib", "Use the built-in zlib library", True))
opts.Add(BoolVariable("builtin_zstd", "Use the built-in Zstd library", True))
# Compilation environment setup
# CXX, CC, and LINK directly set the equivalent `env` values (which may still
# be overridden for a specific platform), the lowercase ones are appended.
opts.Add("CXX", "C++ compiler binary")
opts.Add("CC", "C compiler binary")
opts.Add("LINK", "Linker binary")
opts.Add("cppdefines", "Custom defines for the pre-processor")
opts.Add("ccflags", "Custom flags for both the C and C++ compilers")
opts.Add("cxxflags", "Custom flags for the C++ compiler")
opts.Add("cflags", "Custom flags for the C compiler")
opts.Add("linkflags", "Custom flags for the linker")
opts.Add("asflags", "Custom flags for the assembler")
opts.Add("arflags", "Custom flags for the archive tool")
opts.Add("rcflags", "Custom flags for Windows resource compiler")
# Update the environment to have all above options defined
# in following code (especially platform and custom_modules).
opts.Update(env)
# Setup caching logic early to catch everything.
methods.prepare_cache(env)
# Copy custom environment variables if set.
if env["import_env_vars"]:
for env_var in str(env["import_env_vars"]).split(","):
if env_var in os.environ:
env["ENV"][env_var] = os.environ[env_var]
# Platform selection: validate input, and add options.
if not env["platform"]:
# Missing `platform` argument, try to detect platform automatically
if (
sys.platform.startswith("linux")
or sys.platform.startswith("dragonfly")
or sys.platform.startswith("freebsd")
or sys.platform.startswith("netbsd")
or sys.platform.startswith("openbsd")
):
env["platform"] = "linuxbsd"
elif sys.platform == "darwin":
env["platform"] = "macos"
elif sys.platform == "win32":
env["platform"] = "windows"
if env["platform"]:
print(f"Automatically detected platform: {env['platform']}")
# Deprecated aliases kept for compatibility.
if env["platform"] in compatibility_platform_aliases:
alias = env["platform"]
platform = compatibility_platform_aliases[alias]
print_warning(
f'Platform "{alias}" has been renamed to "{platform}" in Godot 4. Building for platform "{platform}".'
)
env["platform"] = platform
# Alias for convenience.
if env["platform"] in ["linux", "bsd"]:
env["platform"] = "linuxbsd"
if env["platform"] not in platform_list:
text = "The following platforms are available:\n\t{}\n".format("\n\t".join(platform_list))
text += "Please run SCons again and select a valid platform: platform=<string>."
if env["platform"] == "list":
print(text)
elif not env["platform"]:
print_error("Could not detect platform automatically.\n" + text)
else:
print_error(f'Invalid target platform "{env["platform"]}".\n' + text)
Exit(0 if env["platform"] == "list" else 255)
# Add platform-specific options.
if env["platform"] in platform_opts:
opts.AddVariables(*platform_opts[env["platform"]])
# Platform-specific flags.
# These can sometimes override default options, so they need to be processed
# as early as possible to ensure that we're using the correct values.
flag_list = platform_flags[env["platform"]]
for key, value in flag_list.items():
if key not in ARGUMENTS or ARGUMENTS[key] == "auto": # Allow command line to override platform flags
env[key] = value
# Update the environment to take platform-specific options into account.
opts.Update(env, {**ARGUMENTS, **env.Dictionary()})
# Detect modules.
modules_detected = OrderedDict()
module_search_paths = ["modules"] # Built-in path.
if env["custom_modules"]:
paths = env["custom_modules"].split(",")
for p in paths:
try:
module_search_paths.append(methods.convert_custom_modules_path(p))
except ValueError as e:
print_error(e)
Exit(255)
for path in module_search_paths:
if path == "modules":
# Built-in modules don't have nested modules,
# so save the time it takes to parse directories.
modules = methods.detect_modules(path, recursive=False)
else: # Custom.
modules = methods.detect_modules(path, env["custom_modules_recursive"])
# Provide default include path for both the custom module search `path`
# and the base directory containing custom modules, as it may be different
# from the built-in "modules" name (e.g. "custom_modules/summator/summator.h"),
# so it can be referenced simply as `#include "summator/summator.h"`
# independently of where a module is located on user's filesystem.
env.Prepend(CPPPATH=[path, os.path.dirname(path)])
# Note: custom modules can override built-in ones.
modules_detected.update(modules)
# Add module options.
for name, path in modules_detected.items():
sys.path.insert(0, path)
import config
if env["modules_enabled_by_default"]:
enabled = True
try:
enabled = config.is_enabled()
except AttributeError:
pass
else:
enabled = False
opts.Add(BoolVariable(f"module_{name}_enabled", f"Enable module '{name}'", enabled))
# Add module-specific options.
try:
opts.AddVariables(*config.get_opts(env["platform"]))
except AttributeError:
pass
sys.path.remove(path)
sys.modules.pop("config")
env.modules_detected = modules_detected
# Update the environment again after all the module options are added.
opts.Update(env, {**ARGUMENTS, **env.Dictionary()})
Help(opts.GenerateHelpText(env))
# FIXME: Tool assignment happening at this stage is a direct consequence of getting the platform logic AFTER the SCons
# environment was already been constructed. Fixing this would require a broader refactor where all options are setup
# ahead of time with native validator/converter functions.
tmppath = "./platform/" + env["platform"]
sys.path.insert(0, tmppath)
import detect
custom_tools = ["default"]
try: # Platform custom tools are optional
custom_tools = detect.get_tools(env)
except AttributeError:
pass
for tool in custom_tools:
env.Tool(tool)
# add default include paths
env.Prepend(CPPPATH=["#"])
# configure ENV for platform
env.platform_exporters = platform_exporters
env.platform_apis = platform_apis
# Configuration of build targets:
# - Editor or template
# - Debug features (DEBUG_ENABLED code)
# - Dev only code (DEV_ENABLED code)
# - Optimization level
# - Debug symbols for crash traces / debuggers
env.editor_build = env["target"] == "editor"
env.dev_build = env["dev_build"]
env.debug_features = env["target"] in ["editor", "template_debug"]
if env["optimize"] == "auto":
if env.dev_build:
opt_level = "none"
elif env.debug_features:
opt_level = "speed_trace"
else: # Release
opt_level = "speed"
env["optimize"] = ARGUMENTS.get("optimize", opt_level)
env["debug_symbols"] = methods.get_cmdline_bool("debug_symbols", env.dev_build)
if env.editor_build:
env.Append(CPPDEFINES=["TOOLS_ENABLED"])
if env.debug_features:
# DEBUG_ENABLED enables debugging *features* and debug-only code, which is intended
# to give *users* extra debugging information for their game development.
env.Append(CPPDEFINES=["DEBUG_ENABLED"])
if env.dev_build:
# DEV_ENABLED enables *engine developer* code which should only be compiled for those
# working on the engine itself.
env.Append(CPPDEFINES=["DEV_ENABLED"])
else:
# Disable assert() for production targets (only used in thirdparty code).
env.Append(CPPDEFINES=["NDEBUG"])
# This is not part of fast_unsafe because the only downside it has compared to
# the default is that SCons won't mark files that were changed in the last second
# as different. This is unlikely to be a problem in any real situation as just booting
# up scons takes more than that time.
# Renamed to `content-timestamp` in SCons >= 4.2, keeping MD5 for compat.
env.Decider("MD5-timestamp")
# SCons speed optimization controlled by the `fast_unsafe` option, which provide
# more than 10 s speed up for incremental rebuilds.
# Unsafe as they reduce the certainty of rebuilding all changed files, so it's
# enabled by default for `debug` builds, and can be overridden from command line.
# Ref: https://github.com/SCons/scons/wiki/GoFastButton
if methods.get_cmdline_bool("fast_unsafe", env.dev_build):
env.SetOption("implicit_cache", 1)
env.SetOption("max_drift", 60)
if env["use_precise_math_checks"]:
env.Append(CPPDEFINES=["PRECISE_MATH_CHECKS"])
if env.editor_build:
if env["engine_update_check"]:
env.Append(CPPDEFINES=["ENGINE_UPDATE_CHECK_ENABLED"])
if not env.File("#main/splash_editor.png").exists():
# Force disabling editor splash if missing.
env["no_editor_splash"] = True
if env["no_editor_splash"]:
env.Append(CPPDEFINES=["NO_EDITOR_SPLASH"])
if not env["deprecated"]:
env.Append(CPPDEFINES=["DISABLE_DEPRECATED"])
if env["precision"] == "double":
env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"])
# Default num_jobs to local cpu count if not user specified.
# SCons has a peculiarity where user-specified options won't be overridden
# by SetOption, so we can rely on this to know if we should use our default.
initial_num_jobs = env.GetOption("num_jobs")
altered_num_jobs = initial_num_jobs + 1
env.SetOption("num_jobs", altered_num_jobs)
if env.GetOption("num_jobs") == altered_num_jobs:
num_jobs = env.get("num_jobs", "")
if str(num_jobs).isdigit() and int(num_jobs) > 0:
env.SetOption("num_jobs", num_jobs)
else:
cpu_count = os.cpu_count()
if cpu_count is None:
print_warning(
"Couldn't auto-detect CPU count to configure build parallelism. Specify it with the `-j` or `num_jobs` arguments."
)
else:
safer_cpu_count = cpu_count if cpu_count <= 4 else cpu_count - 1
print(
"Auto-detected %d CPU cores available for build parallelism. Using %d cores by default. You can override it with the `-j` or `num_jobs` arguments."
% (cpu_count, safer_cpu_count)
)
env.SetOption("num_jobs", safer_cpu_count)
env.extra_suffix = ""
if env["extra_suffix"] != "":
env.extra_suffix += "." + env["extra_suffix"]
# Environment flags
env.Append(CPPDEFINES=env.get("cppdefines", "").split())
env.Append(CCFLAGS=env.get("ccflags", "").split())
env.Append(CXXFLAGS=env.get("cxxflags", "").split())
env.Append(CFLAGS=env.get("cflags", "").split())
env.Append(LINKFLAGS=env.get("linkflags", "").split())
env.Append(ASFLAGS=env.get("asflags", "").split())
env.Append(ARFLAGS=env.get("arflags", "").split())
env.Append(RCFLAGS=env.get("rcflags", "").split())
# Feature build profile
env.disabled_classes = []
if env["build_profile"] != "":
print(f'Using feature build profile: "{env["build_profile"]}"')
import json
try:
ft = json.load(open(env["build_profile"], "r", encoding="utf-8"))
if "disabled_classes" in ft:
env.disabled_classes = ft["disabled_classes"]
if "disabled_build_options" in ft:
dbo = ft["disabled_build_options"]
for c in dbo:
env[c] = dbo[c]
except json.JSONDecodeError:
print_error(f'Failed to open feature build profile: "{env["build_profile"]}"')
Exit(255)
# 'dev_mode' and 'production' are aliases to set default options if they haven't been
# set manually by the user.
if env["dev_mode"]:
env["verbose"] = methods.get_cmdline_bool("verbose", True)
env["warnings"] = ARGUMENTS.get("warnings", "extra")
env["werror"] = methods.get_cmdline_bool("werror", True)
env["tests"] = methods.get_cmdline_bool("tests", True)
env["strict_checks"] = methods.get_cmdline_bool("strict_checks", True)
if env["production"]:
env["use_static_cpp"] = methods.get_cmdline_bool("use_static_cpp", True)
env["debug_symbols"] = methods.get_cmdline_bool("debug_symbols", False)
if env["platform"] == "android":
env["swappy"] = methods.get_cmdline_bool("swappy", True)
# LTO "auto" means we handle the preferred option in each platform detect.py.
env["lto"] = ARGUMENTS.get("lto", "auto")
if env["strict_checks"]:
env.Append(CPPDEFINES=["STRICT_CHECKS"])
# Run SCU file generation script if in a SCU build.
if env["scu_build"]:
max_includes_per_scu = 8
if env.dev_build:
max_includes_per_scu = 1024
read_scu_limit = int(env["scu_limit"])
read_scu_limit = max(0, min(read_scu_limit, 1024))
if read_scu_limit != 0:
max_includes_per_scu = read_scu_limit
methods.set_scu_folders(scu_builders.generate_scu_files(max_includes_per_scu))
# Must happen after the flags' definition, as configure is when most flags
# are actually handled to change compile options, etc.
detect.configure(env)
print(f'Building for platform "{env["platform"]}", architecture "{env["arch"]}", target "{env["target"]}".')
if env.dev_build:
print_info("Developer build, with debug optimization level and debug symbols (unless overridden).")
# Enforce our minimal compiler version requirements
cc_version = methods.get_compiler_version(env)
cc_version_major = cc_version["major"]
cc_version_minor = cc_version["minor"]
cc_version_metadata1 = cc_version["metadata1"]
if cc_version_major == -1:
print_warning(
"Couldn't detect compiler version, skipping version checks. "
"Build may fail if the compiler doesn't support C++17 fully."
)
elif methods.using_gcc(env):
if cc_version_major < 9:
print_error(
"Detected GCC version older than 9, which does not fully support "
"C++17, or has bugs when compiling Godot. Supported versions are 9 "
"and later. Use a newer GCC version, or Clang 6 or later by passing "
'"use_llvm=yes" to the SCons command line.'
)
Exit(255)
elif cc_version_metadata1 == "win32":
print_error(
"Detected mingw version is not using posix threads. Only posix "
"version of mingw is supported. "
'Use "update-alternatives --config x86_64-w64-mingw32-g++" '
"to switch to posix threads."
)
Exit(255)
elif methods.using_clang(env):
# Apple LLVM versions differ from upstream LLVM version \o/, compare
# in https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
if methods.is_apple_clang(env):
if cc_version_major < 10:
print_error(
"Detected Apple Clang version older than 10, which does not fully "
"support C++17. Supported versions are Apple Clang 10 and later."
)
Exit(255)
elif env["debug_paths_relative"] and cc_version_major < 12:
print_warning(
"Apple Clang < 12 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option."
)
env["debug_paths_relative"] = False
else:
if cc_version_major < 6:
print_error(
"Detected Clang version older than 6, which does not fully support "
"C++17. Supported versions are Clang 6 and later."
)
Exit(255)
elif env["debug_paths_relative"] and cc_version_major < 10:
print_warning("Clang < 10 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
env["debug_paths_relative"] = False
elif env.msvc:
# Ensure latest minor builds of Visual Studio 2017/2019.
# https://github.com/godotengine/godot/pull/94995#issuecomment-2336464574
if cc_version_major == 16 and cc_version_minor < 11:
print_error(
"Detected Visual Studio 2019 version older than 16.11, which has bugs "
"when compiling Godot. Use a newer VS2019 version, or VS2022."
)
Exit(255)
if cc_version_major == 15 and cc_version_minor < 9:
print_error(
"Detected Visual Studio 2017 version older than 15.9, which has bugs "
"when compiling Godot. Use a newer VS2017 version, or VS2019/VS2022."
)
Exit(255)
if cc_version_major < 15:
print_error(
"Detected Visual Studio 2015 or earlier, which is unsupported in Godot. "
"Supported versions are Visual Studio 2017 and later."
)
Exit(255)
# Default architecture flags.
if env["arch"] == "x86_32":
if env.msvc:
env.Append(CCFLAGS=["/arch:SSE2"])
else:
env.Append(CCFLAGS=["-msse2"])
# Explicitly specify colored output.
if methods.using_gcc(env):
env.AppendUnique(CCFLAGS=["-fdiagnostics-color" if is_stderr_color() else "-fno-diagnostics-color"])
elif methods.using_clang(env) or methods.using_emcc(env):
env.AppendUnique(CCFLAGS=["-fcolor-diagnostics" if is_stderr_color() else "-fno-color-diagnostics"])
if sys.platform == "win32":
env.AppendUnique(CCFLAGS=["-fansi-escape-codes"])
# Set optimize and debug_symbols flags.
# "custom" means do nothing and let users set their own optimization flags.
# Needs to happen after configure to have `env.msvc` defined.
if env.msvc:
if env["debug_symbols"]:
env.Append(CCFLAGS=["/Zi", "/FS"])
env.Append(LINKFLAGS=["/DEBUG:FULL"])
else:
env.Append(LINKFLAGS=["/DEBUG:NONE"])
if env["optimize"].startswith("speed"):
env.Append(CCFLAGS=["/O2"])
env.Append(LINKFLAGS=["/OPT:REF"])
if env["optimize"] == "speed_trace":
env.Append(LINKFLAGS=["/OPT:NOICF"])
elif env["optimize"].startswith("size"):
env.Append(CCFLAGS=["/O1"])
env.Append(LINKFLAGS=["/OPT:REF"])
if env["optimize"] == "size_extra":
env.Append(CPPDEFINES=["SIZE_EXTRA"])
elif env["optimize"] == "debug" or env["optimize"] == "none":
env.Append(CCFLAGS=["/Od"])
else:
if env["debug_symbols"]:
if env["platform"] == "windows":
if methods.using_clang(env):
env.Append(CCFLAGS=["-gdwarf-4"]) # clang dwarf-5 symbols are broken on Windows.
else:
env.Append(CCFLAGS=["-gdwarf-5"]) # For gcc, only dwarf-5 symbols seem usable by libbacktrace.
else:
# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
# otherwise addr2line doesn't understand them
env.Append(CCFLAGS=["-gdwarf-4"])
if methods.using_emcc(env):
# Emscripten only produces dwarf symbols when using "-g3".
env.Append(CCFLAGS=["-g3"])
# Emscripten linker needs debug symbols options too.
env.Append(LINKFLAGS=["-gdwarf-4"])
env.Append(LINKFLAGS=["-g3"])
elif env.dev_build:
env.Append(CCFLAGS=["-g3"])
else:
env.Append(CCFLAGS=["-g2"])
if env["debug_paths_relative"]:
# Remap absolute paths to relative paths for debug symbols.
project_path = Dir("#").abspath
env.Append(CCFLAGS=[f"-ffile-prefix-map={project_path}=."])
else:
if methods.is_apple_clang(env):
# Apple Clang, its linker doesn't like -s.
env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
else:
env.Append(LINKFLAGS=["-s"])
# Linker needs optimization flags too, at least for Emscripten.
# For other toolchains, this _may_ be useful for LTO too to disambiguate.
if env["optimize"] == "speed":
env.Append(CCFLAGS=["-O3"])
env.Append(LINKFLAGS=["-O3"])
# `-O2` is friendlier to debuggers than `-O3`, leading to better crash backtraces.
elif env["optimize"] == "speed_trace":
env.Append(CCFLAGS=["-O2"])
env.Append(LINKFLAGS=["-O2"])
elif env["optimize"].startswith("size"):
env.Append(CCFLAGS=["-Os"])
env.Append(LINKFLAGS=["-Os"])
if env["optimize"] == "size_extra":
env.Append(CPPDEFINES=["SIZE_EXTRA"])
elif env["optimize"] == "debug":
env.Append(CCFLAGS=["-Og"])
env.Append(LINKFLAGS=["-Og"])
elif env["optimize"] == "none":
env.Append(CCFLAGS=["-O0"])
env.Append(LINKFLAGS=["-O0"])
# Needs to happen after configure to handle "auto".
if env["lto"] != "none":
print("Using LTO: " + env["lto"])
# Set our C and C++ standard requirements.
# C++17 is required as we need guaranteed copy elision as per GH-36436.
# Prepending to make it possible to override.
# This needs to come after `configure`, otherwise we don't have env.msvc.
if not env.msvc:
# Specifying GNU extensions support explicitly, which are supported by
# both GCC and Clang. Both currently default to gnu17 and gnu++17.
env.Prepend(CFLAGS=["-std=gnu17"])
env.Prepend(CXXFLAGS=["-std=gnu++17"])
else:
# MSVC started offering C standard support with Visual Studio 2019 16.8, which covers all
# of our supported VS2019 & VS2022 versions; VS2017 will only pass the C++ standard.
env.Prepend(CXXFLAGS=["/std:c++17"])
if cc_version_major < 16:
print_warning("Visual Studio 2017 cannot specify a C-Standard.")
else:
env.Prepend(CFLAGS=["/std:c17"])
# MSVC is non-conforming with the C++ standard by default, so we enable more conformance.
# Note that this is still not complete conformance, as certain Windows-related headers
# don't compile under complete conformance.
env.Prepend(CCFLAGS=["/permissive-"])
# Allow use of `__cplusplus` macro to determine C++ standard universally.
env.Prepend(CXXFLAGS=["/Zc:__cplusplus"])
# Disable exception handling. Godot doesn't use exceptions anywhere, and this
# saves around 20% of binary size and very significant build time (GH-80513).
if env["disable_exceptions"]:
if env.msvc:
env.Append(CPPDEFINES=[("_HAS_EXCEPTIONS", 0)])
else:
env.Append(CXXFLAGS=["-fno-exceptions"])
elif env.msvc:
env.Append(CXXFLAGS=["/EHsc"])
# Configure compiler warnings
if env.msvc and not methods.using_clang(env): # MSVC
# Disable warnings which we don't plan to fix.
disabled_warnings = [
"/wd4100", # C4100 (unreferenced formal parameter): Doesn't play nice with polymorphism.
"/wd4127", # C4127 (conditional expression is constant)
"/wd4201", # C4201 (non-standard nameless struct/union): Only relevant for C89.
"/wd4244", # C4244 C4245 C4267 (narrowing conversions): Unavoidable at this scale.
"/wd4245",
"/wd4267",
"/wd4305", # C4305 (truncation): double to float or real_t, too hard to avoid.
"/wd4324", # C4820 (structure was padded due to alignment specifier)
"/wd4514", # C4514 (unreferenced inline function has been removed)
"/wd4714", # C4714 (function marked as __forceinline not inlined)
"/wd4820", # C4820 (padding added after construct)
]
if env["warnings"] == "extra":
env.Append(CCFLAGS=["/W4"] + disabled_warnings)
elif env["warnings"] == "all":
# C4458 is like -Wshadow. Part of /W4 but let's apply it for the default /W3 too.
env.Append(CCFLAGS=["/W3", "/w34458"] + disabled_warnings)
elif env["warnings"] == "moderate":
env.Append(CCFLAGS=["/W2"] + disabled_warnings)
else: # 'no'
# C4267 is particularly finicky & needs to be explicitly disabled.
env.Append(CCFLAGS=["/w", "/wd4267"])
if env["werror"]:
env.Append(CCFLAGS=["/WX"])
env.Append(LINKFLAGS=["/WX"])
else: # GCC, Clang
common_warnings = []
if methods.using_gcc(env):
common_warnings += ["-Wshadow", "-Wno-misleading-indentation"]
if cc_version_major < 11:
# Regression in GCC 9/10, spams so much in our variadic templates
# that we need to outright disable it.
common_warnings += ["-Wno-type-limits"]
if cc_version_major >= 12: # False positives in our error macros, see GH-58747.
common_warnings += ["-Wno-return-type"]
elif methods.using_clang(env) or methods.using_emcc(env):
common_warnings += ["-Wshadow-field-in-constructor", "-Wshadow-uncaptured-local"]
# We often implement `operator<` for structs of pointers as a requirement
# for putting them in `Set` or `Map`. We don't mind about unreliable ordering.
common_warnings += ["-Wno-ordered-compare-function-pointers"]
# clang-cl will interpret `-Wall` as `-Weverything`, workaround with compatibility cast
W_ALL = "-Wall" if not env.msvc else "-W3"
if env["warnings"] == "extra":
env.Append(CCFLAGS=[W_ALL, "-Wextra", "-Wwrite-strings", "-Wno-unused-parameter"] + common_warnings)
env.Append(CXXFLAGS=["-Wctor-dtor-privacy", "-Wnon-virtual-dtor"])
if methods.using_gcc(env):
env.Append(
CCFLAGS=[
"-Walloc-zero",
"-Wduplicated-branches",
"-Wduplicated-cond",
"-Wstringop-overflow=4",
]
)
env.Append(CXXFLAGS=["-Wplacement-new=1", "-Wvirtual-inheritance"])
# Need to fix a warning with AudioServer lambdas before enabling.
# if cc_version_major != 9: # GCC 9 had a regression (GH-36325).
# env.Append(CXXFLAGS=["-Wnoexcept"])
if cc_version_major >= 9:
env.Append(CCFLAGS=["-Wattribute-alias=2"])
if cc_version_major >= 11: # Broke on MethodBind templates before GCC 11.
env.Append(CCFLAGS=["-Wlogical-op"])
elif methods.using_clang(env) or methods.using_emcc(env):
env.Append(CCFLAGS=["-Wimplicit-fallthrough"])
elif env["warnings"] == "all":
env.Append(CCFLAGS=[W_ALL] + common_warnings)
elif env["warnings"] == "moderate":
env.Append(CCFLAGS=[W_ALL, "-Wno-unused"] + common_warnings)
else: # 'no'
env.Append(CCFLAGS=["-w"])
if env["werror"]:
env.Append(CCFLAGS=["-Werror"])
if hasattr(detect, "get_program_suffix"):
suffix = "." + detect.get_program_suffix()
else:
suffix = "." + env["platform"]
suffix += "." + env["target"]
if env.dev_build:
suffix += ".dev"
if env["precision"] == "double":
suffix += ".double"
suffix += "." + env["arch"]
if not env["threads"]:
suffix += ".nothreads"
suffix += env.extra_suffix
sys.path.remove(tmppath)
sys.modules.pop("detect")
if env.editor_build:
unsupported_opts = []
for disable_opt in ["disable_3d", "disable_advanced_gui", "disable_physics_2d", "disable_physics_3d"]:
if env[disable_opt]:
unsupported_opts.append(disable_opt)
if unsupported_opts != []:
print_error(
"The following build option(s) cannot be used for editor builds, but only for export template builds: {}.".format(
", ".join(unsupported_opts)
)
)
Exit(255)
if env["disable_3d"]:
env.Append(CPPDEFINES=["_3D_DISABLED"])
env["disable_physics_3d"] = True
env["disable_xr"] = True
if env["disable_advanced_gui"]:
env.Append(CPPDEFINES=["ADVANCED_GUI_DISABLED"])
if env["disable_physics_2d"]:
env.Append(CPPDEFINES=["PHYSICS_2D_DISABLED"])
if env["disable_physics_3d"]:
env.Append(CPPDEFINES=["PHYSICS_3D_DISABLED"])
if env["disable_xr"]:
env.Append(CPPDEFINES=["XR_DISABLED"])
if env["minizip"]:
env.Append(CPPDEFINES=["MINIZIP_ENABLED"])
if env["brotli"]:
env.Append(CPPDEFINES=["BROTLI_ENABLED"])
if not env["verbose"]:
methods.no_verbose(env)
modules_enabled = OrderedDict()
env.module_dependencies = {}
env.module_icons_paths = []
env.doc_class_path = platform_doc_class_path
for name, path in modules_detected.items():
if not env[f"module_{name}_enabled"]:
continue
sys.path.insert(0, path)
env.current_module = name
import config
if config.can_build(env, env["platform"]):
# Disable it if a required dependency is missing.
if not env.module_check_dependencies(name):
continue
config.configure(env)
# Get doc classes paths (if present)
try:
doc_classes = config.get_doc_classes()
doc_path = config.get_doc_path()
for c in doc_classes:
env.doc_class_path[c] = path + "/" + doc_path
except Exception:
pass
# Get icon paths (if present)
try:
icons_path = config.get_icons_path()
env.module_icons_paths.append(path + "/" + icons_path)
except Exception:
# Default path for module icons
env.module_icons_paths.append(path + "/" + "icons")