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-rw-r--r--SConstruct71
-rw-r--r--platform/android/detect.py7
-rw-r--r--platform/ios/detect.py9
-rw-r--r--platform/linuxbsd/detect.py4
-rw-r--r--platform/macos/detect.py9
-rw-r--r--platform/web/detect.py4
-rw-r--r--platform/windows/detect.py8
7 files changed, 65 insertions, 47 deletions
diff --git a/SConstruct b/SConstruct
index 891f1116e1..200e8e5984 100644
--- a/SConstruct
+++ b/SConstruct
@@ -170,7 +170,7 @@ opts.Add(EnumVariable("arch", "CPU architecture", "auto", ["auto"] + architectur
opts.Add(EnumVariable("float", "Floating-point precision", "32", ("32", "64")))
opts.Add(EnumVariable("optimize", "Optimization type", "speed", ("speed", "size", "none")))
opts.Add(BoolVariable("production", "Set defaults to build Godot for use in production", False))
-opts.Add(EnumVariable("lto", "Link-time optimization (for production buids)", "none", ("none", "thin", "full")))
+opts.Add(EnumVariable("lto", "Link-time optimization (for production buids)", "none", ("none", "auto", "thin", "full")))
# Components
opts.Add(BoolVariable("deprecated", "Enable compatibility code for deprecated and removed features", True))
@@ -460,36 +460,17 @@ if selected_platform in platform_list:
env["LINKFLAGS"] = ""
env.Append(LINKFLAGS=str(LINKFLAGS).split())
- # Platform specific flags
+ # Platform specific flags.
+ # These can sometimes override default options.
flag_list = platform_flags[selected_platform]
for f in flag_list:
if not (f[0] in ARGUMENTS) or ARGUMENTS[f[0]] == "auto": # Allow command line to override platform flags
env[f[0]] = f[1]
- # Must happen after the flags' definition, so that they can be used by platform detect
- detect.configure(env)
-
- print(
- 'Building for platform "%s", architecture "%s", %s, target "%s".'
- % (selected_platform, env["arch"], "editor" if env["tools"] else "template", env["target"])
- )
-
- # 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 gnu11 and gnu++14.
- env.Prepend(CFLAGS=["-std=gnu11"])
- env.Prepend(CXXFLAGS=["-std=gnu++17"])
- else:
- # MSVC doesn't have clear C standard support, /std only covers C++.
- # We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
- env.Prepend(CCFLAGS=["/std:c++17"])
-
- # 'dev' and 'production' are aliases to set default options if they haven't been set
- # manually by the user.
+ # 'dev' and 'production' are aliases to set default options if they haven't been
+ # set manually by the user.
+ # These need to be checked *after* platform specific flags so that different
+ # default values can be set (e.g. to keep LTO off for `production` on some platforms).
if env["dev"]:
env["verbose"] = methods.get_cmdline_bool("verbose", True)
env["warnings"] = ARGUMENTS.get("warnings", "extra")
@@ -498,27 +479,43 @@ if selected_platform in platform_list:
env["tests"] = methods.get_cmdline_bool("tests", True)
if env["production"]:
env["use_static_cpp"] = methods.get_cmdline_bool("use_static_cpp", True)
- env["lto"] = ARGUMENTS.get("lto", "full")
env["debug_symbols"] = methods.get_cmdline_bool("debug_symbols", False)
+ # LTO "auto" means we handle the preferred option in each platform detect.py.
+ env["lto"] = ARGUMENTS.get("lto", "auto")
if not env["tools"] and env["target"] == "debug":
print(
"WARNING: Requested `production` build with `tools=no target=debug`, "
"this will give you a full debug template (use `target=release_debug` "
"for an optimized template with debug features)."
)
- if env.msvc:
- print(
- "WARNING: For `production` Windows builds, you should use MinGW with GCC "
- "or Clang instead of Visual Studio, as they can better optimize the "
- "GDScript VM in a very significant way. MSVC LTO also doesn't work "
- "reliably for our use case."
- "If you want to use MSVC nevertheless for production builds, set "
- "`debug_symbols=no lto=none` instead of the `production=yes` option."
- )
- Exit(255)
+
+ # Must happen after the flags' definition, as configure is when most flags
+ # are actually handled to change compile options, etc.
+ detect.configure(env)
+
+ # 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 gnu11 and gnu++14.
+ env.Prepend(CFLAGS=["-std=gnu11"])
+ env.Prepend(CXXFLAGS=["-std=gnu++17"])
+ else:
+ # MSVC doesn't have clear C standard support, /std only covers C++.
+ # We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
+ env.Prepend(CCFLAGS=["/std:c++17"])
+
+ print(
+ 'Building for platform "%s", architecture "%s", %s, target "%s".'
+ % (selected_platform, env["arch"], "editor" if env["tools"] else "template", env["target"])
+ )
+
# Enforce our minimal compiler version requirements
cc_version = methods.get_compiler_version(env) or {
"major": None,
diff --git a/platform/android/detect.py b/platform/android/detect.py
index 1d9bcdd932..a31bba745f 100644
--- a/platform/android/detect.py
+++ b/platform/android/detect.py
@@ -47,9 +47,6 @@ def get_flags():
return [
("arch", "arm64"), # Default for convenience.
("tools", False),
- # Benefits of LTO for Android (size, performance) haven't been clearly established yet.
- # So for now we override the default value which may be set when using `production=yes`.
- ("lto", "none"),
]
@@ -136,6 +133,10 @@ def configure(env):
env.Append(CPPFLAGS=["-UNDEBUG"])
# LTO
+
+ if env["lto"] == "auto": # LTO benefits for Android (size, performance) haven't been clearly established yet.
+ env["lto"] = "none"
+
if env["lto"] != "none":
if env["lto"] == "thin":
env.Append(CCFLAGS=["-flto=thin"])
diff --git a/platform/ios/detect.py b/platform/ios/detect.py
index ed7e714c4e..d5e6ee4b46 100644
--- a/platform/ios/detect.py
+++ b/platform/ios/detect.py
@@ -39,9 +39,6 @@ def get_flags():
("arch", "arm64"), # Default for convenience.
("tools", False),
("use_volk", False),
- # Disable by default even if production is set, as it makes linking in Xcode
- # on exports very slow and that's not what most users expect.
- ("lto", "none"),
]
@@ -73,7 +70,11 @@ def configure(env):
env.Append(CCFLAGS=["-gdwarf-2", "-O0"])
env.Append(CPPDEFINES=["_DEBUG", ("DEBUG", 1)])
- # LTO
+ ## LTO
+
+ if env["lto"] == "auto": # Disable by default as it makes linking in Xcode very slow.
+ env["lto"] = "none"
+
if env["lto"] != "none":
if env["lto"] == "thin":
env.Append(CCFLAGS=["-flto=thin"])
diff --git a/platform/linuxbsd/detect.py b/platform/linuxbsd/detect.py
index 36644d5f29..12d2432eea 100644
--- a/platform/linuxbsd/detect.py
+++ b/platform/linuxbsd/detect.py
@@ -171,6 +171,10 @@ def configure(env):
env.Append(LINKFLAGS=["-fsanitize=memory"])
# LTO
+
+ if env["lto"] == "auto": # Full LTO for production.
+ env["lto"] = "full"
+
if env["lto"] != "none":
if env["lto"] == "thin":
if not env["use_llvm"]:
diff --git a/platform/macos/detect.py b/platform/macos/detect.py
index bcf4776609..834ac935d8 100644
--- a/platform/macos/detect.py
+++ b/platform/macos/detect.py
@@ -40,9 +40,6 @@ def get_flags():
return [
("arch", detect_arch()),
("use_volk", False),
- # Benefits of LTO for macOS (size, performance) haven't been clearly established yet.
- # So for now we override the default value which may be set when using `production=yes`.
- ("lto", "none"),
]
@@ -170,6 +167,10 @@ def configure(env):
env["AS"] = basecmd + "as"
# LTO
+
+ if env["lto"] == "auto": # LTO benefits for macOS (size, performance) haven't been clearly established yet.
+ env["lto"] = "none"
+
if env["lto"] != "none":
if env["lto"] == "thin":
env.Append(CCFLAGS=["-flto=thin"])
@@ -178,6 +179,8 @@ def configure(env):
env.Append(CCFLAGS=["-flto"])
env.Append(LINKFLAGS=["-flto"])
+ # Sanitizers
+
if env["use_ubsan"] or env["use_asan"] or env["use_tsan"]:
env.extra_suffix += ".san"
env.Append(CCFLAGS=["-DSANITIZERS_ENABLED"])
diff --git a/platform/web/detect.py b/platform/web/detect.py
index 08f964db92..9cce73efc4 100644
--- a/platform/web/detect.py
+++ b/platform/web/detect.py
@@ -109,6 +109,10 @@ def configure(env):
env["ENV"] = os.environ
# LTO
+
+ if env["lto"] == "auto": # Full LTO for production.
+ env["lto"] = "full"
+
if env["lto"] != "none":
if env["lto"] == "thin":
env.Append(CCFLAGS=["-flto=thin"])
diff --git a/platform/windows/detect.py b/platform/windows/detect.py
index e6e1874fc0..52a959b34a 100644
--- a/platform/windows/detect.py
+++ b/platform/windows/detect.py
@@ -448,6 +448,9 @@ def configure_msvc(env, vcvars_msvc_config):
## LTO
+ if env["lto"] == "auto": # No LTO by default for MSVC, doesn't help.
+ env["lto"] = "none"
+
if env["lto"] != "none":
if env["lto"] == "thin":
print("ThinLTO is only compatible with LLVM, use `use_llvm=yes` or `lto=full`.")
@@ -564,6 +567,11 @@ def configure_mingw(env):
if try_cmd("gcc-ranlib --version", env["mingw_prefix"], env["arch"]):
env["RANLIB"] = mingw_bin_prefix + "gcc-ranlib"
+ ## LTO
+
+ if env["lto"] == "auto": # Full LTO for production with MinGW.
+ env["lto"] = "full"
+
if env["lto"] != "none":
if env["lto"] == "thin":
if not env["use_llvm"]:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 02:24:55 +0000