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godotengine/platform/linuxbsd/detect.py
Rémi Verschelde 26db0bb15f SCons: Make lto=auto prefer ThinLTO over full LTO for LLVM targets 
This speeds up build time considerably for these platforms compared to
using `lto=full`, which is sadly single-threaded with LLVM, unlike GCC.

Changes to default behavior of `lto=auto` (i.e. `production=yes`):
- Linux: Prefer ThinLTO for LLVM
- Web: Prefer ThinLTO
- Windows: Prefer ThinLTO for llvm-mingw

The following LLVM targets don't use LTO by default currently, which
needs to be assessed further (gains from LLVM LTO on performance need
to be weighed against the potential size increase from heavy inlining):
- Android
- iOS
- macOS
- Windows clang-cl
2025-01-09 13:03:58 +01:00

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import os
import platform
import sys
from typing import TYPE_CHECKING
from methods import get_compiler_version, print_error, print_info, print_warning, using_gcc
from platform_methods import detect_arch, validate_arch
if TYPE_CHECKING:
from SCons.Script.SConscript import SConsEnvironment
def get_name():
return "LinuxBSD"
def can_build():
if os.name != "posix" or sys.platform == "darwin":
return False
pkgconf_error = os.system("pkg-config --version > /dev/null")
if pkgconf_error:
print_error("pkg-config not found. Aborting.")
return False
return True
def get_opts():
from SCons.Variables import BoolVariable, EnumVariable
return [
EnumVariable("linker", "Linker program", "default", ("default", "bfd", "gold", "lld", "mold")),
BoolVariable("use_llvm", "Use the LLVM compiler", False),
BoolVariable("use_static_cpp", "Link libgcc and libstdc++ statically for better portability", True),
BoolVariable("use_coverage", "Test Godot coverage", False),
BoolVariable("use_ubsan", "Use LLVM/GCC compiler undefined behavior sanitizer (UBSAN)", False),
BoolVariable("use_asan", "Use LLVM/GCC compiler address sanitizer (ASAN)", False),
BoolVariable("use_lsan", "Use LLVM/GCC compiler leak sanitizer (LSAN)", False),
BoolVariable("use_tsan", "Use LLVM/GCC compiler thread sanitizer (TSAN)", False),
BoolVariable("use_msan", "Use LLVM compiler memory sanitizer (MSAN)", False),
BoolVariable("use_sowrap", "Dynamically load system libraries", True),
BoolVariable("alsa", "Use ALSA", True),
BoolVariable("pulseaudio", "Use PulseAudio", True),
BoolVariable("dbus", "Use D-Bus to handle screensaver and portal desktop settings", True),
BoolVariable("speechd", "Use Speech Dispatcher for Text-to-Speech support", True),
BoolVariable("fontconfig", "Use fontconfig for system fonts support", True),
BoolVariable("udev", "Use udev for gamepad connection callbacks", True),
BoolVariable("x11", "Enable X11 display", True),
BoolVariable("wayland", "Enable Wayland display", True),
BoolVariable("libdecor", "Enable libdecor support", True),
BoolVariable("touch", "Enable touch events", True),
BoolVariable("execinfo", "Use libexecinfo on systems where glibc is not available", False),
]
def get_doc_classes():
return [
"EditorExportPlatformLinuxBSD",
]
def get_doc_path():
return "doc_classes"
def get_flags():
return {
"arch": detect_arch(),
"supported": ["mono"],
}
def configure(env: "SConsEnvironment"):
# Validate arch.
supported_arches = ["x86_32", "x86_64", "arm32", "arm64", "rv64", "ppc32", "ppc64", "loongarch64"]
validate_arch(env["arch"], get_name(), supported_arches)
## Build type
if env.dev_build:
# This is needed for our crash handler to work properly.
# gdb works fine without it though, so maybe our crash handler could too.
env.Append(LINKFLAGS=["-rdynamic"])
# Cross-compilation
# TODO: Support cross-compilation on architectures other than x86.
host_is_64_bit = sys.maxsize > 2**32
if host_is_64_bit and env["arch"] == "x86_32":
env.Append(CCFLAGS=["-m32"])
env.Append(LINKFLAGS=["-m32"])
elif not host_is_64_bit and env["arch"] == "x86_64":
env.Append(CCFLAGS=["-m64"])
env.Append(LINKFLAGS=["-m64"])
# CPU architecture flags.
if env["arch"] == "rv64":
# G = General-purpose extensions, C = Compression extension (very common).
env.Append(CCFLAGS=["-march=rv64gc"])
## Compiler configuration
if "CXX" in env and "clang" in os.path.basename(env["CXX"]):
# Convenience check to enforce the use_llvm overrides when CXX is clang(++)
env["use_llvm"] = True
if env["use_llvm"]:
if "clang++" not in os.path.basename(env["CXX"]):
env["CC"] = "clang"
env["CXX"] = "clang++"
env.extra_suffix = ".llvm" + env.extra_suffix
if env["linker"] != "default":
print("Using linker program: " + env["linker"])
if env["linker"] == "mold" and using_gcc(env): # GCC < 12.1 doesn't support -fuse-ld=mold.
cc_version = get_compiler_version(env)
cc_semver = (cc_version["major"], cc_version["minor"])
if cc_semver < (12, 1):
found_wrapper = False
for path in ["/usr/libexec", "/usr/local/libexec", "/usr/lib", "/usr/local/lib"]:
if os.path.isfile(path + "/mold/ld"):
env.Append(LINKFLAGS=["-B" + path + "/mold"])
found_wrapper = True
break
if not found_wrapper:
for path in os.environ["PATH"].split(os.pathsep):
if os.path.isfile(path + "/ld.mold"):
env.Append(LINKFLAGS=["-B" + path])
found_wrapper = True
break
if not found_wrapper:
print_error(
"Couldn't locate mold installation path. Make sure it's installed in /usr, /usr/local or in PATH environment variable."
)
sys.exit(255)
else:
env.Append(LINKFLAGS=["-fuse-ld=mold"])
else:
env.Append(LINKFLAGS=["-fuse-ld=%s" % env["linker"]])
if env["use_coverage"]:
env.Append(CCFLAGS=["-ftest-coverage", "-fprofile-arcs"])
env.Append(LINKFLAGS=["-ftest-coverage", "-fprofile-arcs"])
if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"] or env["use_msan"]:
env.extra_suffix += ".san"
env.Append(CCFLAGS=["-DSANITIZERS_ENABLED"])
if env["use_ubsan"]:
env.Append(
CCFLAGS=[
"-fsanitize=undefined,shift,shift-exponent,integer-divide-by-zero,unreachable,vla-bound,null,return,signed-integer-overflow,bounds,float-divide-by-zero,float-cast-overflow,nonnull-attribute,returns-nonnull-attribute,bool,enum,vptr,pointer-overflow,builtin"
]
)
env.Append(LINKFLAGS=["-fsanitize=undefined"])
if env["use_llvm"]:
env.Append(
CCFLAGS=[
"-fsanitize=nullability-return,nullability-arg,function,nullability-assign,implicit-integer-sign-change"
]
)
else:
env.Append(CCFLAGS=["-fsanitize=bounds-strict"])
if env["use_asan"]:
env.Append(CCFLAGS=["-fsanitize=address,pointer-subtract,pointer-compare"])
env.Append(LINKFLAGS=["-fsanitize=address"])
if env["use_lsan"]:
env.Append(CCFLAGS=["-fsanitize=leak"])
env.Append(LINKFLAGS=["-fsanitize=leak"])
if env["use_tsan"]:
env.Append(CCFLAGS=["-fsanitize=thread"])
env.Append(LINKFLAGS=["-fsanitize=thread"])
if env["use_msan"] and env["use_llvm"]:
env.Append(CCFLAGS=["-fsanitize=memory"])
env.Append(CCFLAGS=["-fsanitize-memory-track-origins"])
env.Append(CCFLAGS=["-fsanitize-recover=memory"])
env.Append(LINKFLAGS=["-fsanitize=memory"])
env.Append(CCFLAGS=["-ffp-contract=off"])
# LTO
if env["lto"] == "auto": # Enable LTO for production.
env["lto"] = "thin" if env["use_llvm"] else "full"
if env["lto"] != "none":
if env["lto"] == "thin":
if not env["use_llvm"]:
print_error("ThinLTO is only compatible with LLVM, use `use_llvm=yes` or `lto=full`.")
sys.exit(255)
env.Append(CCFLAGS=["-flto=thin"])
env.Append(LINKFLAGS=["-flto=thin"])
elif not env["use_llvm"] and env.GetOption("num_jobs") > 1:
env.Append(CCFLAGS=["-flto"])
env.Append(LINKFLAGS=["-flto=" + str(env.GetOption("num_jobs"))])
else:
env.Append(CCFLAGS=["-flto"])
env.Append(LINKFLAGS=["-flto"])
if not env["use_llvm"]:
env["RANLIB"] = "gcc-ranlib"
env["AR"] = "gcc-ar"
env.Append(CCFLAGS=["-pipe"])
## Dependencies
if env["use_sowrap"]:
env.Append(CPPDEFINES=["SOWRAP_ENABLED"])
if env["wayland"]:
if os.system("wayland-scanner -v 2>/dev/null") != 0:
print_warning("wayland-scanner not found. Disabling Wayland support.")
env["wayland"] = False
if env["touch"]:
env.Append(CPPDEFINES=["TOUCH_ENABLED"])
# FIXME: Check for existence of the libs before parsing their flags with pkg-config
if not env["builtin_freetype"]:
env.ParseConfig("pkg-config freetype2 --cflags --libs")
if not env["builtin_graphite"]:
env.ParseConfig("pkg-config graphite2 --cflags --libs")
if not env["builtin_icu4c"]:
env.ParseConfig("pkg-config icu-i18n icu-uc --cflags --libs")
if not env["builtin_harfbuzz"]:
env.ParseConfig("pkg-config harfbuzz harfbuzz-icu --cflags --libs")
if not env["builtin_icu4c"] or not env["builtin_harfbuzz"]:
print_warning(
"System-provided icu4c or harfbuzz cause known issues for GDExtension (see GH-91401 and GH-100301)."
)
if not env["builtin_libpng"]:
env.ParseConfig("pkg-config libpng16 --cflags --libs")
if not env["builtin_enet"]:
env.ParseConfig("pkg-config libenet --cflags --libs")
if not env["builtin_zstd"]:
env.ParseConfig("pkg-config libzstd --cflags --libs")
if env["brotli"] and not env["builtin_brotli"]:
env.ParseConfig("pkg-config libbrotlicommon libbrotlidec --cflags --libs")
# Sound and video libraries
# Keep the order as it triggers chained dependencies (ogg needed by others, etc.)
if not env["builtin_libtheora"]:
env["builtin_libogg"] = False # Needed to link against system libtheora
env["builtin_libvorbis"] = False # Needed to link against system libtheora
env.ParseConfig("pkg-config theora theoradec --cflags --libs")
else:
if env["arch"] in ["x86_64", "x86_32"]:
env["x86_libtheora_opt_gcc"] = True
if not env["builtin_libvorbis"]:
env["builtin_libogg"] = False # Needed to link against system libvorbis
env.ParseConfig("pkg-config vorbis vorbisfile --cflags --libs")
if not env["builtin_libogg"]:
env.ParseConfig("pkg-config ogg --cflags --libs")
if not env["builtin_libwebp"]:
env.ParseConfig("pkg-config libwebp --cflags --libs")
if not env["builtin_mbedtls"]:
# mbedTLS only provides a pkgconfig file since 3.6.0, but we still support 2.28.x,
# so fallback to manually specifying LIBS if it fails.
if os.system("pkg-config --exists mbedtls") == 0: # 0 means found
env.ParseConfig("pkg-config mbedtls mbedcrypto mbedx509 --cflags --libs")
else:
env.Append(LIBS=["mbedtls", "mbedcrypto", "mbedx509"])
if not env["builtin_wslay"]:
env.ParseConfig("pkg-config libwslay --cflags --libs")
if not env["builtin_miniupnpc"]:
env.ParseConfig("pkg-config miniupnpc --cflags --libs")
# On Linux wchar_t should be 32-bits
# 16-bit library shouldn't be required due to compiler optimizations
if not env["builtin_pcre2"]:
env.ParseConfig("pkg-config libpcre2-32 --cflags --libs")
if not env["builtin_recastnavigation"]:
# No pkgconfig file so far, hardcode default paths.
env.Prepend(CPPPATH=["/usr/include/recastnavigation"])
env.Append(LIBS=["Recast"])
if not env["builtin_embree"] and env["arch"] in ["x86_64", "arm64"]:
# No pkgconfig file so far, hardcode expected lib name.
env.Append(LIBS=["embree4"])
if not env["builtin_openxr"]:
env.ParseConfig("pkg-config openxr --cflags --libs")
if env["fontconfig"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists fontconfig") == 0: # 0 means found
env.ParseConfig("pkg-config fontconfig --cflags --libs")
env.Append(CPPDEFINES=["FONTCONFIG_ENABLED"])
else:
print_warning("fontconfig development libraries not found. Disabling the system fonts support.")
env["fontconfig"] = False
else:
env.Append(CPPDEFINES=["FONTCONFIG_ENABLED"])
if env["alsa"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists alsa") == 0: # 0 means found
env.ParseConfig("pkg-config alsa --cflags --libs")
env.Append(CPPDEFINES=["ALSA_ENABLED", "ALSAMIDI_ENABLED"])
else:
print_warning("ALSA development libraries not found. Disabling the ALSA audio driver.")
env["alsa"] = False
else:
env.Append(CPPDEFINES=["ALSA_ENABLED", "ALSAMIDI_ENABLED"])
if env["pulseaudio"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists libpulse") == 0: # 0 means found
env.ParseConfig("pkg-config libpulse --cflags --libs")
env.Append(CPPDEFINES=["PULSEAUDIO_ENABLED"])
else:
print_warning("PulseAudio development libraries not found. Disabling the PulseAudio audio driver.")
env["pulseaudio"] = False
else:
env.Append(CPPDEFINES=["PULSEAUDIO_ENABLED", "_REENTRANT"])
if env["dbus"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists dbus-1") == 0: # 0 means found
env.ParseConfig("pkg-config dbus-1 --cflags --libs")
env.Append(CPPDEFINES=["DBUS_ENABLED"])
else:
print_warning("D-Bus development libraries not found. Disabling screensaver prevention.")
env["dbus"] = False
else:
env.Append(CPPDEFINES=["DBUS_ENABLED"])
if env["speechd"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists speech-dispatcher") == 0: # 0 means found
env.ParseConfig("pkg-config speech-dispatcher --cflags --libs")
env.Append(CPPDEFINES=["SPEECHD_ENABLED"])
else:
print_warning("speech-dispatcher development libraries not found. Disabling text to speech support.")
env["speechd"] = False
else:
env.Append(CPPDEFINES=["SPEECHD_ENABLED"])
if not env["use_sowrap"]:
if os.system("pkg-config --exists xkbcommon") == 0: # 0 means found
env.ParseConfig("pkg-config xkbcommon --cflags --libs")
env.Append(CPPDEFINES=["XKB_ENABLED"])
else:
if env["wayland"]:
print_error("libxkbcommon development libraries required by Wayland not found. Aborting.")
sys.exit(255)
else:
print_warning(
"libxkbcommon development libraries not found. Disabling dead key composition and key label support."
)
else:
env.Append(CPPDEFINES=["XKB_ENABLED"])
if platform.system() == "Linux":
env.Append(CPPDEFINES=["JOYDEV_ENABLED"])
if env["udev"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists libudev") == 0: # 0 means found
env.ParseConfig("pkg-config libudev --cflags --libs")
env.Append(CPPDEFINES=["UDEV_ENABLED"])
else:
print_warning("libudev development libraries not found. Disabling controller hotplugging support.")
env["udev"] = False
else:
env.Append(CPPDEFINES=["UDEV_ENABLED"])
else:
env["udev"] = False # Linux specific
# Linkflags below this line should typically stay the last ones
if not env["builtin_zlib"]:
env.ParseConfig("pkg-config zlib --cflags --libs")
env.Prepend(CPPPATH=["#platform/linuxbsd"])
if env["use_sowrap"]:
env.Prepend(CPPPATH=["#thirdparty/linuxbsd_headers"])
env.Append(
CPPDEFINES=[
"LINUXBSD_ENABLED",
"UNIX_ENABLED",
("_FILE_OFFSET_BITS", 64),
]
)
if env["x11"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists x11"):
print_error("X11 libraries not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config x11 --cflags --libs")
if os.system("pkg-config --exists xcursor"):
print_error("Xcursor library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xcursor --cflags --libs")
if os.system("pkg-config --exists xinerama"):
print_error("Xinerama library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xinerama --cflags --libs")
if os.system("pkg-config --exists xext"):
print_error("Xext library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xext --cflags --libs")
if os.system("pkg-config --exists xrandr"):
print_error("XrandR library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xrandr --cflags --libs")
if os.system("pkg-config --exists xrender"):
print_error("XRender library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xrender --cflags --libs")
if os.system("pkg-config --exists xi"):
print_error("Xi library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config xi --cflags --libs")
env.Append(CPPDEFINES=["X11_ENABLED"])
if env["wayland"]:
if not env["use_sowrap"]:
if os.system("pkg-config --exists libdecor-0"):
print_warning("libdecor development libraries not found. Disabling client-side decorations.")
env["libdecor"] = False
else:
env.ParseConfig("pkg-config libdecor-0 --cflags --libs")
if os.system("pkg-config --exists wayland-client"):
print_error("Wayland client library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config wayland-client --cflags --libs")
if os.system("pkg-config --exists wayland-cursor"):
print_error("Wayland cursor library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config wayland-cursor --cflags --libs")
if os.system("pkg-config --exists wayland-egl"):
print_error("Wayland EGL library not found. Aborting.")
sys.exit(255)
env.ParseConfig("pkg-config wayland-egl --cflags --libs")
if env["libdecor"]:
env.Append(CPPDEFINES=["LIBDECOR_ENABLED"])
env.Prepend(CPPPATH=["#platform/linuxbsd", "#thirdparty/linuxbsd_headers/wayland/"])
env.Append(CPPDEFINES=["WAYLAND_ENABLED"])
env.Append(LIBS=["rt"]) # Needed by glibc, used by _allocate_shm_file
if env["vulkan"]:
env.Append(CPPDEFINES=["VULKAN_ENABLED", "RD_ENABLED"])
if not env["use_volk"]:
env.ParseConfig("pkg-config vulkan --cflags --libs")
if not env["builtin_glslang"]:
# No pkgconfig file so far, hardcode expected lib name.
env.Append(LIBS=["glslang", "SPIRV"])
if env["opengl3"]:
env.Append(CPPDEFINES=["GLES3_ENABLED"])
env.Append(LIBS=["pthread"])
if platform.system() == "Linux":
env.Append(LIBS=["dl"])
if platform.libc_ver()[0] != "glibc":
if env["execinfo"]:
env.Append(LIBS=["execinfo"])
env.Append(CPPDEFINES=["CRASH_HANDLER_ENABLED"])
else:
# The default crash handler depends on glibc, so if the host uses
# a different libc (BSD libc, musl), libexecinfo is required.
print_info("Using `execinfo=no` disables the crash handler on platforms where glibc is missing.")
else:
env.Append(CPPDEFINES=["CRASH_HANDLER_ENABLED"])
if platform.system() == "FreeBSD":
env.Append(LINKFLAGS=["-lkvm"])
# Link those statically for portability
if env["use_static_cpp"]:
env.Append(LINKFLAGS=["-static-libgcc", "-static-libstdc++"])
if env["use_llvm"] and platform.system() != "FreeBSD":
env["LINKCOM"] = env["LINKCOM"] + " -l:libatomic.a"
else:
if env["use_llvm"] and platform.system() != "FreeBSD":
env.Append(LIBS=["atomic"])
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