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cada03eedb
Godot supports many different compilers and for production releases we
have to support 3 currently: GCC8, Clang6, and MSVC2017. These compilers
all do slightly different things with -ffast-math and it is causing
issues now. See #24841, #24540, #10758, #10070. And probably other
complaints about physics differences between release and release_debug
builds.
I've done some performance comparisons on Linux x86_64. All tests are
ran 20 times.
Bunnymark: (higher is better)
(bunnies) min max stdev average
fast-math 7332 7597 71 7432
this pr 7379 7779 108 7621 (102%)
FPBench (gdscript port http://fpbench.org/) (lower is better)
(ms)
fast-math 15441 16127 192 15764
this pr 15671 16855 326 16001 (99%)
Float_add (adding floats in a tight loop) (lower is better)
(sec)
fast-math 5.49 5.78 0.07 5.65
this pr 5.65 5.90 0.06 5.76 (98%)
Float_div (dividing floats in a tight loop) (lower is better)
(sec)
fast-math 11.70 12.36 0.18 11.99
this pr 11.92 12.32 0.12 12.12 (99%)
Float_mul (multiplying floats in a tight loop) (lower is better)
(sec)
fast-math 11.72 12.17 0.12 11.93
this pr 12.01 12.62 0.17 12.26 (97%)
I have also looked at FPS numbers for tps-demo, 3d platformer, 2d
platformer, and sponza and could not find any measurable difference.
I believe that given the issues and oft-reported (physics) glitches on
release builds I believe that the couple of percent of tight-loop
floating point performance regression is well worth it.
This fixes #24540 and fixes #24841
(cherry picked from commit e5b335d367)
131 lines
4.7 KiB
Python
131 lines
4.7 KiB
Python
import os
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import sys
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def is_active():
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return True
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def get_name():
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return "OSX"
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def can_build():
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if (sys.platform == "darwin" or ("OSXCROSS_ROOT" in os.environ)):
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return True
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return False
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def get_opts():
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from SCons.Variables import BoolVariable, EnumVariable
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return [
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('osxcross_sdk', 'OSXCross SDK version', 'darwin14'),
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EnumVariable('debug_symbols', 'Add debug symbols to release version', 'yes', ('yes', 'no', 'full')),
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BoolVariable('separate_debug_symbols', 'Create a separate file with the debug symbols', False),
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]
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def get_flags():
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return [
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]
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def configure(env):
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## Build type
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if (env["target"] == "release"):
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env.Prepend(CCFLAGS=['-O3', '-fomit-frame-pointer', '-ftree-vectorize', '-msse2'])
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if (env["debug_symbols"] == "yes"):
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env.Prepend(CCFLAGS=['-g1'])
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if (env["debug_symbols"] == "full"):
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env.Prepend(CCFLAGS=['-g2'])
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elif (env["target"] == "release_debug"):
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env.Prepend(CCFLAGS=['-O2', '-DDEBUG_ENABLED'])
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if (env["debug_symbols"] == "yes"):
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env.Prepend(CCFLAGS=['-g1'])
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if (env["debug_symbols"] == "full"):
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env.Prepend(CCFLAGS=['-g2'])
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elif (env["target"] == "debug"):
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env.Prepend(CCFLAGS=['-g3', '-DDEBUG_ENABLED', '-DDEBUG_MEMORY_ENABLED'])
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## Architecture
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is64 = sys.maxsize > 2**32
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if (env["bits"] == "default"):
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env["bits"] = "64" if is64 else "32"
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## Compiler configuration
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if "OSXCROSS_ROOT" not in os.environ: # regular native build
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if (env["bits"] == "fat"):
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env.Append(CCFLAGS=['-arch', 'i386', '-arch', 'x86_64'])
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env.Append(LINKFLAGS=['-arch', 'i386', '-arch', 'x86_64'])
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elif (env["bits"] == "32"):
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env.Append(CCFLAGS=['-arch', 'i386'])
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env.Append(LINKFLAGS=['-arch', 'i386'])
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else: # 64-bit, default
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env.Append(CCFLAGS=['-arch', 'x86_64'])
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env.Append(LINKFLAGS=['-arch', 'x86_64'])
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if (env["macports_clang"] != 'no'):
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mpprefix = os.environ.get("MACPORTS_PREFIX", "/opt/local")
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mpclangver = env["macports_clang"]
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env["CC"] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/clang"
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env["LINK"] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/clang++"
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env["CXX"] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/clang++"
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env['AR'] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/llvm-ar"
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env['RANLIB'] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/llvm-ranlib"
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env['AS'] = mpprefix + "/libexec/llvm-" + mpclangver + "/bin/llvm-as"
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env.Append(CCFLAGS=['-D__MACPORTS__']) #hack to fix libvpx MM256_BROADCASTSI128_SI256 define
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else: # osxcross build
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root = os.environ.get("OSXCROSS_ROOT", 0)
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if env["bits"] == "fat":
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basecmd = root + "/target/bin/x86_64-apple-" + env["osxcross_sdk"] + "-"
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env.Append(CCFLAGS=['-arch', 'i386', '-arch', 'x86_64'])
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env.Append(LINKFLAGS=['-arch', 'i386', '-arch', 'x86_64'])
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elif env["bits"] == "32":
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basecmd = root + "/target/bin/i386-apple-" + env["osxcross_sdk"] + "-"
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else: # 64-bit, default
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basecmd = root + "/target/bin/x86_64-apple-" + env["osxcross_sdk"] + "-"
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ccache_path = os.environ.get("CCACHE")
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if ccache_path == None:
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env['CC'] = basecmd + "cc"
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env['CXX'] = basecmd + "c++"
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else:
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# there aren't any ccache wrappers available for OS X cross-compile,
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# to enable caching we need to prepend the path to the ccache binary
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env['CC'] = ccache_path + ' ' + basecmd + "cc"
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env['CXX'] = ccache_path + ' ' + basecmd + "c++"
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env['AR'] = basecmd + "ar"
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env['RANLIB'] = basecmd + "ranlib"
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env['AS'] = basecmd + "as"
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env.Append(CCFLAGS=['-D__MACPORTS__']) #hack to fix libvpx MM256_BROADCASTSI128_SI256 define
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if (env["CXX"] == "clang++"):
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env.Append(CPPFLAGS=['-DTYPED_METHOD_BIND'])
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env["CC"] = "clang"
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env["LINK"] = "clang++"
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## Dependencies
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if env['builtin_libtheora']:
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env["x86_libtheora_opt_gcc"] = True
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## Flags
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env.Append(CPPPATH=['#platform/osx'])
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env.Append(CPPFLAGS=['-DOSX_ENABLED', '-DUNIX_ENABLED', '-DGLES_ENABLED', '-DAPPLE_STYLE_KEYS', '-DCOREAUDIO_ENABLED'])
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env.Append(LINKFLAGS=['-framework', 'Cocoa', '-framework', 'Carbon', '-framework', 'OpenGL', '-framework', 'AGL', '-framework', 'AudioUnit', '-framework', 'CoreAudio', '-lz', '-framework', 'IOKit', '-framework', 'ForceFeedback'])
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env.Append(LIBS=['pthread'])
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env.Append(CPPFLAGS=['-mmacosx-version-min=10.9'])
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env.Append(LINKFLAGS=['-mmacosx-version-min=10.9'])
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