cctools-port: Use old version for iOS to support TBD linking

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

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, makeWrapper, autoconf, automake, libtool_2
+{ stdenv, fetchFromGitHub, makeWrapper, autoconf, automake, libtool_2, autoreconfHook
 , llvm, libcxx, libcxxabi, clang, libuuid
 , libobjc ? null, maloader ? null, xctoolchain ? null
 , hostPlatform, targetPlatform
@@ -6,6 +6,14 @@
 }:
 
 let
+
+  # We need to use an old version of cctools-port to support linking TBD files
+  # in the iOS SDK. Note that this only provides support for SDK versions up to
+  # 10.x. For 11.0 and higher we will need to upgrade to a newer cctools than the
+  # default version here, which can support the new TBD format via Apple's
+  # libtapi.
+  useOld = targetPlatform.isiOS;
+
   # The targetPrefix prepended to binary names to allow multiple binuntils on the
   # PATH to both be usable.
   targetPrefix = stdenv.lib.optionalString
@@ -16,10 +24,12 @@ in
 # Non-Darwin alternatives
 assert (!hostPlatform.isDarwin) -> (maloader != null && xctoolchain != null);
 
+assert enableDumpNormalizedLibArgs -> (!useOld);
+
 let
   baseParams = rec {
     name = "${targetPrefix}cctools-port-${version}";
-    version = "895";
+    version = if useOld then "886" else "895";
 
     src = fetchFromGitHub (if enableDumpNormalizedLibArgs then {
       owner  = "tpoechtrager";
@@ -27,6 +37,11 @@ let
       # master with https://github.com/tpoechtrager/cctools-port/pull/34
       rev    = "8395d4b2c3350356e2fb02f5e04f4f463c7388df";
       sha256 = "10vbf1cfzx02q8chc77s84fp2kydjpx2y682mr6mrbb7sq5rwh8f";
+    } else if useOld then {
+      owner  = "tpoechtrager";
+      repo   = "cctools-port";
+      rev    = "02f0b8ecd87a3951653d838a321ae744815e21a5";
+      sha256 = "0bzyabzr5dvbxglr74d0kbrk2ij5x7s5qcamqi1v546q1had1wz1";
     } else {
       owner  = "tpoechtrager";
       repo   = "cctools-port";
@@ -36,7 +51,11 @@ let
 
     outputs = [ "out" "dev" ];
 
-    nativeBuildInputs = [ autoconf automake libtool_2 ];
+    nativeBuildInputs = [
+      autoconf automake libtool_2
+    ] ++ stdenv.lib.optionals useOld [
+      autoreconfHook
+    ];
     buildInputs = [ libuuid ] ++
       # Only need llvm and clang if the stdenv isn't already clang-based (TODO: just make a stdenv.cc.isClang)
       stdenv.lib.optionals (!stdenv.isDarwin) [ llvm clang ] ++
@@ -44,9 +63,14 @@ let
 
     patches = [
       ./ld-rpath-nonfinal.patch ./ld-ignore-rpath-link.patch
+    ] ++ stdenv.lib.optionals useOld [
+      # See https://github.com/tpoechtrager/cctools-port/issues/24. Remove when that's fixed.
+      ./undo-unknown-triple.patch
+      ./ld-tbd-v2.patch
+      ./support-ios.patch
     ];
 
-    __propagatedImpureHostDeps = [
+    __propagatedImpureHostDeps = stdenv.lib.optionals (!useOld) [
       # As far as I can tell, otool from cctools is the only thing that depends on these two, and we should fix them
       "/usr/lib/libobjc.A.dylib"
       "/usr/lib/libobjc.dylib"
@@ -86,12 +110,15 @@ let
       EOF
     '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
       sed -i -e 's|clang++|& -I${libcxx}/include/c++/v1|' cctools/autogen.sh
+    '' + stdenv.lib.optionalString useOld ''
+      cd cctools
     '';
 
     # TODO: this builds an ld without support for LLVM's LTO. We need to teach it, but that's rather
     # hairy to handle during bootstrap. Perhaps it could be optional?
-    preConfigure = ''
+    preConfigure = stdenv.lib.optionalString (!useOld) ''
       cd cctools
+    '' + ''
       sh autogen.sh
     '';
 

pkgs/os-specific/darwin/cctools/support-ios.patch

@@ -0,0 +1,13 @@
+diff --git a/cctools/configure.ac b/cctools/configure.ac
+index 56e8f24..0b4b3ff 100644
+--- a/cctools/configure.ac
++++ b/cctools/configure.ac
+@@ -39,7 +39,7 @@ EXTRACXXFLAGS=""
+ WARNINGS=""
+ 
+ case $host_os in
+-  darwin* )
++  darwin* | ios*)
+     isdarwin=yes
+     AM_CONDITIONAL([ISDARWIN], [true])
+   ;;

pkgs/os-specific/darwin/cctools/undo-unknown-triple.patch

@@ -0,0 +1,17 @@
+diff --git a/cctools/as/driver.c b/cctools/as/driver.c
+index b06d085..c03397a 100644
+--- a/cctools/as/driver.c
++++ b/cctools/as/driver.c
+@@ -363,12 +363,6 @@ char **envp)
+ 	    /* Add -c or clang will run ld(1). */
+ 	    new_argv[j] = "-c";
+ 	    j++;
+-	    /* cctools-port start */
+-	    new_argv[j] = "-target";
+-	    j++;
+-	    new_argv[j] = "unknown-apple-darwin";
+-	    j++;
+-	    /* cctools-port end */
+ 	    new_argv[j] = NULL;
+ 	    if(execute(new_argv, verbose))
+ 		exit(0);