string GetSharedArguments_Global(CppConfiguration Configuration, bool bOptimizeForSize, string Architecture, bool bEnableShadowVariableWarnings, bool bShadowVariableWarningsAsErrors, bool bEnableUndefinedIdentifierWarnings, bool bUndefinedIdentifierWarningsAsErrors, bool bUseInlining, bool bUE423_OSX_LinkerFix = false)
{
string Result = " ";
// string Result = " -Werror";
Result += " -fdiagnostics-format=msvc";
Result += " -fno-exceptions";
Result += " -Wdelete-non-virtual-dtor";
Result += " -Wno-switch"; // many unhandled cases
Result += " -Wno-tautological-constant-out-of-range-compare"; // comparisons from TCHAR being a char
Result += " -Wno-tautological-compare"; // comparison of unsigned expression < 0 is always false" (constant comparisons, which are possible with template arguments)
Result += " -Wno-tautological-undefined-compare"; // pointer cannot be null in well-defined C++ code; comparison may be assumed to always evaluate
Result += " -Wno-inconsistent-missing-override"; // as of 1.35.0, overriding a member function but not marked as 'override' triggers warnings
Result += " -Wno-undefined-var-template"; // 1.36.11
Result += " -Wno-invalid-offsetof"; // using offsetof on non-POD types
Result += " -Wno-gnu-string-literal-operator-template"; // allow static FNames
if (bEnableShadowVariableWarnings)
{
Result += " -Wshadow"; //+ (bShadowVariableWarningsAsErrors ? "" : " -Wno-error=shadow");
}
if (bEnableUndefinedIdentifierWarnings)
{
Result += " -Wundef"; //+ (bUndefinedIdentifierWarningsAsErrors ? "" : " -Wno-error=undef");
}
// --------------------------------------------------------------------------------
if (Configuration == CppConfiguration.Debug)
{ // WARNING: UEBuildTarget.cs :: GetCppConfiguration()
Result += " -O0"; // faster compile time // DebugGame is forced to Development
} // i.e. this will never get hit...
else if (bOptimizeForSize)
{ // Engine/Source/Programs/UnrealBuildTool/HTML5/UEBuildHTML5.cs
Result += " -Oz"; // favor size over speed // bCompileForSize=true; // set false, to build -O2 or -O3
} // SOURCE BUILD ONLY
else if (Configuration == CppConfiguration.Development)
{
Result += " -O2"; // aggressive size and speed optimization
}
else if (Configuration == CppConfiguration.Shipping)
{
if (bUE423_OSX_LinkerFix && (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Mac))
{ // UE-78966 - TEMP HACK - remove this on next EMSCRIPTEN_TOOLCHAIN_UPGRADE_CHECK
Result += " -O2";
}
else
{
Result += " -O3"; // favor speed over size
}
}
if (!bUseInlining)
{
Result += " -fno-inline-functions";
}
PrintOnce(Configuration, bOptimizeForSize);
// --------------------------------------------------------------------------------
// JavaScript option overrides (see src/settings.js)
if (enableSIMD)
{
// Result += " -msse2 -s SIMD=1";
}
if (enableMultithreading)
{
// Result += " -msse2 -s USE_PTHREADS=1";
Result += " -s USE_PTHREADS=1";
Result += " -DEXPERIMENTAL_OPENGL_RHITHREAD=" + (bMultithreading_UseOffscreenCanvas ? "0" : "1");
// NOTE: use "emscripten native" video, keyboard, mouse
}
else
{
// SDL2 is not supported for multi-threading WASM builds
// WARNING: SDL2 may be removed in a future UE4 release
// can comment out to use "emscripten native" single threaded
// Result += " -DHTML5_USE_SDL2";
}
if (useLLVMwasmBackend) // experimental - LLVMWasmBackend
{
Result += " -s WASM_OBJECT_FILES=1";
Environment.SetEnvironmentVariable("EMCC_WASM_BACKEND", "1");
}
// --------------------------------------------------------------------------------
// emscripten ports
// WARNING: seems emscripten ports cannot be currently used
// there might be UE4 changes needed that are found in Engine/Source/ThirdParty/...
// Result += " -s USE_ZLIB=1";
// Result += " -s USE_LIBPNG=1";
// Result += " -s USE_VORBIS=1";
// Result += " -s USE_OGG=1";
// Result += " -s USE_FREETYPE=1"; // TAG = 'release_1'
// Result += " -s USE_HARFBUZZ=1"; // TAG = '1.2.4 note: path is https://github.com/harfbuzz/harfbuzz/archive/1.2.4.zip
// Result += " -s USE_ICU=1"; // TAG = 'release-53-1'
// SDL_Audio needs to be linked in [no matter if -DHTML5_USE_SDL2 is used or not]
// TODO: remove AudioMixerSDL from Engine/Source/Runtime/Launch/Launch.Build.cs and replace with emscripten native functions
// Result += " -s USE_SDL=2";
// --------------------------------------------------------------------------------
// Expect that Emscripten SDK has been properly set up ahead in time (with emsdk and prebundled toolchains this is always the case)
// This speeds up builds a tiny bit.
Environment.SetEnvironmentVariable("EMCC_SKIP_SANITY_CHECK", "1");
// THESE ARE TEST/DEBUGGING -- TRY NOT TO USE THESE
// Environment.SetEnvironmentVariable("EMCC_DEBUG", "1"); // NOTE: try to use -v instead of EMCC_DEBUG
// Environment.SetEnvironmentVariable("EMCC_DEBUG_SAVE", "1"); // very useful for compiler bughunts
// Environment.SetEnvironmentVariable("EMCC_CORES", "8");
// Environment.SetEnvironmentVariable("EMCC_OPTIMIZE_NORMALLY", "1");
// enable verbose mode
// Result += " -v"; // useful for path hunting issues
if (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Linux)
{
// Packaging on Linux needs this - or else system clang will be attempted to be picked up instead of UE4's included emsdk
Environment.SetEnvironmentVariable(HTML5SDKInfo.PLATFORM_USER_HOME, HTML5SDKInfo.HTML5Intermediatory);
}
if (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Win64 || BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Win32)
{
// Packaging on Window needs this - zap any existing HOME environment variables to prevent any accidental pick ups
Environment.SetEnvironmentVariable("HOME", "");
}
if (BuildHostPlatform.Current.Platform == UnrealTargetPlatform.Mac)
{
Environment.SetEnvironmentVariable("LD_LIBRARY_PATH", HTML5SDKInfo.MacPythonLib()); // UE-75402
}
return(Result);
}
