Add a patch for cctools to work with Xcode 8

pkgs/os-specific/darwin/cctools/ld-tbd-v2.patch

@@ -0,0 +1,98 @@
+diff --git a/cctools/ld64/src/ld/parsers/textstub_dylib_file.cpp b/cctools/ld64/src/ld/parsers/textstub_dylib_file.cpp
+index 09c0e12..ac6b085 100644
+--- a/cctools/ld64/src/ld/parsers/textstub_dylib_file.cpp
++++ b/cctools/ld64/src/ld/parsers/textstub_dylib_file.cpp
+@@ -187,6 +187,7 @@ struct DynamicLibrary {
+ 	ld::File::ObjcConstraint _objcConstraint;
+ 	Options::Platform _platform;
+ 	std::vector<Token> _allowedClients;
++	std::vector<Token> _allowableClients;
+ 	std::vector<Token> _reexportedLibraries;
+ 	std::vector<Token> _symbols;
+ 	std::vector<Token> _classes;
+@@ -246,6 +247,14 @@ class TBDFile {
+ 		});
+ 	}
+ 
++	void parseAllowableClients(DynamicLibrary& lib) {
++		if ( !hasOptionalToken("allowable-clients") )
++			return;
++		parseFlowSequence([&](Token name) {
++			lib._allowableClients.emplace_back(name);
++		});
++	}
++
+ 	void parseReexportedDylibs(DynamicLibrary& lib) {
+ 		if ( !hasOptionalToken("re-exports") )
+ 			return;
+@@ -306,6 +315,21 @@ class TBDFile {
+ 		return false;
+ 	}
+ 
++	void skipUUIDs(DynamicLibrary& lib) {
++		expectToken("uuids");
++		while ( true ) {
++			auto token = next();
++			if ( token == "]" )
++				break;
++		}
++	}
++
++	void skipParentUmbrella(DynamicLibrary& lib) {
++		if (!hasOptionalToken("parent-umbrella"))
++			return;
++		next();
++	}
++
+ 	void parsePlatform(DynamicLibrary& lib) {
+ 		expectToken("platform");
+ 
+@@ -410,6 +434,7 @@ class TBDFile {
+ 			}
+ 
+ 			parseAllowedClients(lib);
++			parseAllowableClients(lib);
+ 			parseReexportedDylibs(lib);
+ 			parseSymbols(lib);
+ 			if ( !hasOptionalToken("-") )
+@@ -455,17 +480,21 @@ class TBDFile {
+ 			return result.front();
+ 	}
+ 
+-	void parseDocument(DynamicLibrary& lib, std::string &requestedArchName) {
++	void parseDocument(DynamicLibrary& lib, std::string &requestedArchName, bool isTbdV2) {
+ 		auto selectedArchName = parseAndSelectArchitecture(requestedArchName);
+ 		if (selectedArchName.empty())
+ 			throwf("invalid arch");
+ 
++		if(isTbdV2)
++			skipUUIDs(lib);
+ 		parsePlatform(lib);
+ 		parseInstallName(lib);
+ 		parseCurrentVersion(lib);
+ 		parseCompatibilityVersion(lib);
+ 		parseSwiftVersion(lib);
+ 		parseObjCConstraint(lib);
++		if(isTbdV2)
++			skipParentUmbrella(lib);
+ 		parseExportsBlock(lib, selectedArchName);
+ 	}
+ 
+@@ -476,7 +505,8 @@ public:
+ 		_tokenizer.reset();
+ 		DynamicLibrary lib;
+ 		expectToken("---");
+-		parseDocument(lib, requestedArchName);
++		auto isTbdV2 = hasOptionalToken("!tapi-tbd-v2");
++		parseDocument(lib, requestedArchName, isTbdV2);
+ 		expectToken("...");
+ 		return lib;
+ 	}
+@@ -486,6 +516,7 @@ public:
+ 		auto token = next();
+ 		if ( token != "---" )
+ 			return false;
++		hasOptionalToken("!tapi-tbd-v2");
+ 		return !parseAndSelectArchitecture(requestedArchName).empty();
+ 	}
+ 

pkgs/os-specific/darwin/cctools/port.nix

@@ -25,6 +25,7 @@ let
     ] ++ stdenv.lib.optionals stdenv.isDarwin [
       # See https://github.com/tpoechtrager/cctools-port/issues/24. Remove when that's fixed.
       ./undo-unknown-triple.patch
+      ./ld-tbd-v2.patch
     ];
 
     enableParallelBuilding = true;