/// <summary>
/// Binds artificial module to given binary.
/// </summary>
/// <param name="Module">Module to bind.</param>
/// <param name="Binary">Binary to bind.</param>
private void BindArtificialModuleToBinary(UEBuildModuleCPP Module, UEBuildBinary Binary)
{
Module.Binary = Binary;
Module.bIncludedInTarget = true;
// Process dependencies for this new module
Module.CachePCHUsageForModuleSourceFiles(Module.CreateModuleCompileEnvironment(GlobalCompileEnvironment));
// Add module to binary
Binary.AddModule(Module.Name);
}
/// <summary>
/// All non-program monolithic binaries implicitly depend on all static plugin libraries so they are always linked appropriately
/// In order to do this, we create a new module here with a cpp file we emit that invokes an empty function in each library.
/// If we do not do this, there will be no static initialization for libs if no symbols are referenced in them.
/// </summary>
private void CreateLinkerFixupsCPPFile()
{
var ExecutableBinary = AppBinaries[0];
List<string> PrivateDependencyModuleNames = new List<string>();
UEBuildBinaryCPP BinaryCPP = ExecutableBinary as UEBuildBinaryCPP;
if (BinaryCPP != null)
{
TargetInfo CurrentTarget = new TargetInfo(Platform, Configuration, (Rules != null) ? TargetType : (TargetRules.TargetType?)null);
foreach (var TargetModuleName in BinaryCPP.ModuleNames)
{
string UnusedFilename;
ModuleRules CheckRules = RulesCompiler.CreateModuleRules(TargetModuleName, CurrentTarget, out UnusedFilename);
if ((CheckRules != null) && (CheckRules.Type != ModuleRules.ModuleType.External))
{
PrivateDependencyModuleNames.Add(TargetModuleName);
}
}
}
foreach (PluginInfo Plugin in EnabledPlugins)
{
foreach (PluginInfo.PluginModuleInfo Module in Plugin.Modules)
{
if(ShouldIncludePluginModule(Plugin, Module))
{
PrivateDependencyModuleNames.Add(Module.Name);
}
}
}
// We ALWAYS have to write this file as the IMPLEMENT_PRIMARY_GAME_MODULE function depends on the UELinkerFixups function existing.
{
List<string> LinkerFixupsFileContents = new List<string>();
string LinkerFixupsName = "UELinkerFixups";
// Include an empty header so UEBuildModule.Compile does not complain about a lack of PCH
string HeaderFilename = LinkerFixupsName + "Name.h";
string LinkerFixupHeaderFilenameWithPath = Path.Combine(GlobalCompileEnvironment.Config.OutputDirectory, HeaderFilename);
LinkerFixupsFileContents.Add("#include \"" + HeaderFilename + "\"");
// Add a function that is not referenced by anything that invokes all the empty functions in the different static libraries
LinkerFixupsFileContents.Add("void " + LinkerFixupsName + "()");
LinkerFixupsFileContents.Add("{");
// Fill out the body of the function with the empty function calls. This is what causes the static libraries to be considered relevant
{
var UObjectModules = new List<UEBuildModuleCPP>();
foreach (var Binary in AppBinaries)
{
var DependencyModules = Binary.GetAllDependencyModules(bIncludeDynamicallyLoaded: false, bForceCircular: false);
foreach (var Module in DependencyModules.OfType<UEBuildModuleCPP>().Where(CPPModule => CPPModule.AutoGenerateCppInfo != null && !UObjectModules.Any(Module => Module.Name == CPPModule.Name)))
{
UObjectModules.Add(Module);
}
}
foreach (var Module in UObjectModules)
{
LinkerFixupsFileContents.Add(" extern void EmptyLinkFunctionForGeneratedCode" + Module.Name + "();");
LinkerFixupsFileContents.Add(" EmptyLinkFunctionForGeneratedCode" + Module.Name + "();");
}
}
foreach (var DependencyModuleName in PrivateDependencyModuleNames)
{
LinkerFixupsFileContents.Add(" extern void EmptyLinkFunctionForStaticInitialization" + DependencyModuleName + "();");
LinkerFixupsFileContents.Add(" EmptyLinkFunctionForStaticInitialization" + DependencyModuleName + "();");
}
// End the function body that was started above
LinkerFixupsFileContents.Add("}");
// Create the cpp file
string LinkerFixupCPPFilename = Path.Combine(GlobalCompileEnvironment.Config.OutputDirectory, LinkerFixupsName + ".cpp");
// Determine if the file changed. Write it if it either doesn't exist or the contents are different.
bool bShouldWriteFile = true;
if (File.Exists(LinkerFixupCPPFilename))
{
string[] ExistingFixupText = File.ReadAllLines(LinkerFixupCPPFilename);
string JoinedNewContents = string.Join("", LinkerFixupsFileContents.ToArray());
string JoinedOldContents = string.Join("", ExistingFixupText);
bShouldWriteFile = (JoinedNewContents != JoinedOldContents);
}
// If we determined that we should write the file, write it now.
if (bShouldWriteFile)
{
ResponseFile.Create(LinkerFixupHeaderFilenameWithPath, new List<string>());
ResponseFile.Create(LinkerFixupCPPFilename, LinkerFixupsFileContents);
}
// Create the source file list (just the one cpp file)
List<FileItem> SourceFiles = new List<FileItem>();
SourceFiles.Add(FileItem.GetItemByPath(LinkerFixupCPPFilename));
// Create the CPP module
var FakeModuleDirectory = Path.GetDirectoryName( LinkerFixupCPPFilename );
UEBuildModuleCPP NewModule = new UEBuildModuleCPP(
InTarget: this,
InName: LinkerFixupsName,
InType: UEBuildModuleType.Game,
InModuleDirectory:FakeModuleDirectory,
InOutputDirectory: GlobalCompileEnvironment.Config.OutputDirectory,
InIsRedistributableOverride: null,
InIntelliSenseGatherer: null,
InSourceFiles: SourceFiles,
InPublicIncludePaths: new List<string>(),
InPublicSystemIncludePaths: new List<string>(),
InDefinitions: new List<string>(),
InPublicIncludePathModuleNames: new List<string>(),
InPublicDependencyModuleNames: new List<string>(),
InPublicDelayLoadDLLs: new List<string>(),
InPublicAdditionalLibraries: new List<string>(),
InPublicFrameworks: new List<string>(),
InPublicWeakFrameworks: new List<string>(),
InPublicAdditionalShadowFiles: new List<string>(),
InPublicAdditionalBundleResources: new List<UEBuildBundleResource>(),
InPublicAdditionalFrameworks: new List<UEBuildFramework>(),
InPrivateIncludePaths: new List<string>(),
InPrivateIncludePathModuleNames: new List<string>(),
InPrivateDependencyModuleNames: PrivateDependencyModuleNames,
InCircularlyReferencedDependentModules: new List<string>(),
InDynamicallyLoadedModuleNames: new List<string>(),
InPlatformSpecificDynamicallyLoadedModuleNames: new List<string>(),
InOptimizeCode: ModuleRules.CodeOptimization.Default,
InAllowSharedPCH: false,
InSharedPCHHeaderFile: "",
InUseRTTI: false,
InEnableBufferSecurityChecks: true,
InFasterWithoutUnity: true,
InMinFilesUsingPrecompiledHeaderOverride: 0,
InEnableExceptions: false,
bInBuildSourceFiles: true
);
// Now bind this new module to the executable binary so it will link the plugin libs correctly
NewModule.Binary = ExecutableBinary;
NewModule.bIncludedInTarget = true;
// Process dependencies for this new module
NewModule.CachePCHUsageForModuleSourceFiles(NewModule.CreateModuleCompileEnvironment(GlobalCompileEnvironment));
// Add module to binary
ExecutableBinary.AddModule(NewModule.Name);
}
}
