@Override
public NativeLinkableInput getNativeLinkableInput(
CxxPlatform cxxPlatform, Linker.LinkableDepType type) throws NoSuchBuildTargetException {
// Build the library path and linker arguments that we pass through the
// {@link NativeLinkable} interface for linking.
ImmutableList.Builder<Arg> linkerArgsBuilder = ImmutableList.builder();
linkerArgsBuilder.addAll(
StringArg.from(Preconditions.checkNotNull(exportedLinkerFlags.apply(cxxPlatform))));
if (!headerOnly) {
if (type == Linker.LinkableDepType.SHARED) {
Preconditions.checkState(getPreferredLinkage(cxxPlatform) != Linkage.STATIC);
final SourcePath sharedLibrary = requireSharedLibrary(cxxPlatform);
if (linkWithoutSoname) {
if (!(sharedLibrary instanceof PathSourcePath)) {
throw new HumanReadableException(
"%s: can only link prebuilt DSOs without sonames", getBuildTarget());
}
linkerArgsBuilder.add(new RelativeLinkArg((PathSourcePath) sharedLibrary));
} else {
linkerArgsBuilder.add(
new SourcePathArg(getResolver(), requireSharedLibrary(cxxPlatform)));
}
} else {
Preconditions.checkState(getPreferredLinkage(cxxPlatform) != Linkage.SHARED);
Path staticLibraryPath =
type == Linker.LinkableDepType.STATIC_PIC
? getStaticPicLibrary(cxxPlatform).get()
: PrebuiltCxxLibraryDescription.getStaticLibraryPath(
getBuildTarget(),
params.getCellRoots(),
ruleResolver,
cxxPlatform,
libDir,
libName);
SourcePathArg staticLibrary =
new SourcePathArg(
getResolver(), new PathSourcePath(getProjectFilesystem(), staticLibraryPath));
if (linkWhole) {
Linker linker = cxxPlatform.getLd();
linkerArgsBuilder.addAll(linker.linkWhole(staticLibrary));
} else {
linkerArgsBuilder.add(staticLibrary);
}
}
}
final ImmutableList<Arg> linkerArgs = linkerArgsBuilder.build();
return NativeLinkableInput.of(
linkerArgs, ImmutableSet.<FrameworkPath>of(), ImmutableSet.<FrameworkPath>of());
}
public static CxxLinkAndCompileRules createBuildRulesForCxxBinary(
TargetGraph targetGraph,
BuildRuleParams params,
BuildRuleResolver resolver,
CxxPlatform cxxPlatform,
ImmutableMap<String, CxxSource> srcs,
ImmutableMap<Path, SourcePath> headers,
ImmutableMap<String, SourcePath> lexSrcs,
ImmutableMap<String, SourcePath> yaccSrcs,
CxxPreprocessMode preprocessMode,
Linker.LinkableDepType linkStyle,
Optional<ImmutableList<String>> preprocessorFlags,
Optional<PatternMatchedCollection<ImmutableList<String>>> platformPreprocessorFlags,
Optional<ImmutableMap<CxxSource.Type, ImmutableList<String>>> langPreprocessorFlags,
Optional<ImmutableSortedSet<FrameworkPath>> frameworks,
Optional<ImmutableList<String>> compilerFlags,
Optional<PatternMatchedCollection<ImmutableList<String>>> platformCompilerFlags,
Optional<SourcePath> prefixHeader,
Optional<ImmutableList<String>> linkerFlags,
Optional<PatternMatchedCollection<ImmutableList<String>>> platformLinkerFlags,
Optional<Linker.CxxRuntimeType> cxxRuntimeType) {
SourcePathResolver sourcePathResolver = new SourcePathResolver(resolver);
Path linkOutput = getLinkOutputPath(params.getBuildTarget());
ImmutableList.Builder<Arg> argsBuilder = ImmutableList.builder();
CommandTool.Builder executableBuilder = new CommandTool.Builder();
// Setup the rules to run lex/yacc.
CxxHeaderSourceSpec lexYaccSources =
requireLexYaccSources(params, resolver, sourcePathResolver, cxxPlatform, lexSrcs, yaccSrcs);
// Setup the header symlink tree and combine all the preprocessor input from this rule
// and all dependencies.
HeaderSymlinkTree headerSymlinkTree =
requireHeaderSymlinkTree(
params,
resolver,
sourcePathResolver,
cxxPlatform,
/* includeLexYaccHeaders */ true,
lexSrcs,
yaccSrcs,
headers,
HeaderVisibility.PRIVATE);
ImmutableList<CxxPreprocessorInput> cxxPreprocessorInput =
collectCxxPreprocessorInput(
targetGraph,
params,
cxxPlatform,
CxxFlags.getLanguageFlags(
preprocessorFlags, platformPreprocessorFlags, langPreprocessorFlags, cxxPlatform),
ImmutableList.of(headerSymlinkTree),
getFrameworkSearchPaths(frameworks, cxxPlatform, new SourcePathResolver(resolver)),
CxxPreprocessables.getTransitiveCxxPreprocessorInput(
targetGraph,
cxxPlatform,
FluentIterable.from(params.getDeps())
.filter(Predicates.instanceOf(CxxPreprocessorDep.class))));
// The complete list of input sources.
ImmutableMap<String, CxxSource> sources =
ImmutableMap.<String, CxxSource>builder()
.putAll(srcs)
.putAll(lexYaccSources.getCxxSources())
.build();
// Generate and add all the build rules to preprocess and compile the source to the
// resolver and get the `SourcePath`s representing the generated object files.
ImmutableMap<CxxPreprocessAndCompile, SourcePath> objects =
CxxSourceRuleFactory.requirePreprocessAndCompileRules(
params,
resolver,
sourcePathResolver,
cxxPlatform,
cxxPreprocessorInput,
CxxFlags.getFlags(compilerFlags, platformCompilerFlags, cxxPlatform),
prefixHeader,
preprocessMode,
sources,
linkStyle == Linker.LinkableDepType.STATIC
? CxxSourceRuleFactory.PicType.PDC
: CxxSourceRuleFactory.PicType.PIC);
// Build up the linker flags, which support macro expansion.
ImmutableList<String> resolvedLinkerFlags =
CxxFlags.getFlags(linkerFlags, platformLinkerFlags, cxxPlatform);
argsBuilder.addAll(
FluentIterable.from(resolvedLinkerFlags)
.transform(
MacroArg.toMacroArgFunction(
MACRO_HANDLER,
params.getBuildTarget(),
params.getCellRoots(),
resolver,
params.getProjectFilesystem())));
// Special handling for dynamically linked binaries.
if (linkStyle == Linker.LinkableDepType.SHARED) {
// Create a symlink tree with for all shared libraries needed by this binary.
SymlinkTree sharedLibraries =
resolver.addToIndex(
createSharedLibrarySymlinkTree(
targetGraph,
params,
sourcePathResolver,
cxxPlatform,
Predicates.instanceOf(NativeLinkable.class)));
// Embed a origin-relative library path into the binary so it can find the shared libraries.
argsBuilder.addAll(
StringArg.from(
Linkers.iXlinker(
"-rpath",
String.format(
"%s/%s",
cxxPlatform.getLd().origin(),
linkOutput.getParent().relativize(sharedLibraries.getRoot()).toString()))));
// Add all the shared libraries and the symlink tree as inputs to the tool that represents
// this binary, so that users can attach the proper deps.
executableBuilder.addDep(sharedLibraries);
executableBuilder.addInputs(sharedLibraries.getLinks().values());
}
// Add object files into the args.
argsBuilder.addAll(SourcePathArg.from(sourcePathResolver, objects.values()));
// Generate the final link rule. We use the top-level target as the link rule's
// target, so that it corresponds to the actual binary we build.
CxxLink cxxLink =
CxxLinkableEnhancer.createCxxLinkableBuildRule(
targetGraph,
cxxPlatform,
params,
sourcePathResolver,
createCxxLinkTarget(params.getBuildTarget()),
Linker.LinkType.EXECUTABLE,
Optional.<String>absent(),
linkOutput,
argsBuilder.build(),
linkStyle,
params.getDeps(),
cxxRuntimeType,
Optional.<SourcePath>absent(),
ImmutableSet.<BuildTarget>of());
resolver.addToIndex(cxxLink);
// Add the output of the link as the lone argument needed to invoke this binary as a tool.
executableBuilder.addArg(new BuildTargetSourcePath(cxxLink.getBuildTarget()));
return new CxxLinkAndCompileRules(
cxxLink, ImmutableSortedSet.copyOf(objects.keySet()), executableBuilder.build());
}
private ImmutableList<com.facebook.buck.rules.args.Arg> getExtensionArgs(
BuildRuleParams params,
BuildRuleResolver ruleResolver,
SourcePathResolver pathResolver,
CxxPlatform cxxPlatform,
Arg args)
throws NoSuchBuildTargetException {
// Extract all C/C++ sources from the constructor arg.
ImmutableMap<String, CxxSource> srcs =
CxxDescriptionEnhancer.parseCxxSources(
params.getBuildTarget(), pathResolver, cxxPlatform, args);
ImmutableMap<Path, SourcePath> headers =
CxxDescriptionEnhancer.parseHeaders(
params.getBuildTarget(), pathResolver, Optional.of(cxxPlatform), args);
// Setup the header symlink tree and combine all the preprocessor input from this rule
// and all dependencies.
HeaderSymlinkTree headerSymlinkTree =
CxxDescriptionEnhancer.requireHeaderSymlinkTree(
params,
ruleResolver,
new SourcePathResolver(ruleResolver),
cxxPlatform,
headers,
HeaderVisibility.PRIVATE);
ImmutableList<CxxPreprocessorInput> cxxPreprocessorInput =
CxxDescriptionEnhancer.collectCxxPreprocessorInput(
params,
cxxPlatform,
CxxFlags.getLanguageFlags(
args.preprocessorFlags,
args.platformPreprocessorFlags,
args.langPreprocessorFlags,
cxxPlatform),
ImmutableList.of(headerSymlinkTree),
ImmutableSet.<FrameworkPath>of(),
CxxPreprocessables.getTransitiveCxxPreprocessorInput(cxxPlatform, params.getDeps()));
// Generate rule to build the object files.
ImmutableMap<CxxPreprocessAndCompile, SourcePath> picObjects =
CxxSourceRuleFactory.requirePreprocessAndCompileRules(
params,
ruleResolver,
pathResolver,
cxxBuckConfig,
cxxPlatform,
cxxPreprocessorInput,
CxxFlags.getLanguageFlags(
args.compilerFlags,
args.platformCompilerFlags,
args.langCompilerFlags,
cxxPlatform),
args.prefixHeader,
cxxBuckConfig.getPreprocessMode(),
srcs,
CxxSourceRuleFactory.PicType.PIC);
ImmutableList.Builder<com.facebook.buck.rules.args.Arg> argsBuilder = ImmutableList.builder();
argsBuilder.addAll(
StringArg.from(CxxFlags.getFlags(args.linkerFlags, args.platformLinkerFlags, cxxPlatform)));
// Embed a origin-relative library path into the binary so it can find the shared libraries.
argsBuilder.addAll(
StringArg.from(
Linkers.iXlinker(
"-rpath",
String.format("%s/", cxxPlatform.getLd().resolve(ruleResolver).libOrigin()))));
// Add object files into the args.
argsBuilder.addAll(SourcePathArg.from(pathResolver, picObjects.values()));
return argsBuilder.build();
}