[gentoo-commits] repo/gentoo:master commit in: sys-libs/tapi/files/, sys-libs/tapi/

[Fabian Groffen]

commit:     861716fce0066319fce54243dab1aa805e04aeff
Author:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
AuthorDate: Fri Dec 29 14:36:17 2017 +0000
Commit:     Fabian Groffen <grobian <AT> gentoo <DOT> org>
CommitDate: Fri Dec 29 14:36:26 2017 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=861716fc

sys-libs/tapi: version bump to support recent ld64 by Michael Weiser

I made some small changes to use a tarball because repoman does not
permit a live-ebuild (one that uses git-r3) to be in the tree unmasked.

Closes: https://bugs.gentoo.org/642292
Package-Manager: Portage-2.3.13, Repoman-2.3.3

 sys-libs/tapi/Manifest                             |   4 +
 .../files/objcmetadata-800.0.42.1-standalone.patch | 130 +++++++++++++++
 sys-libs/tapi/files/tapi-2.0.0-standalone.patch    | 141 ++++++++++++++++
 sys-libs/tapi/tapi-2.0.0.ebuild                    | 177 +++++++++++++++++++++
 4 files changed, 452 insertions(+)

diff --git a/sys-libs/tapi/Manifest b/sys-libs/tapi/Manifest
index 5993a858a41..cf5af5026f1 100644
--- a/sys-libs/tapi/Manifest
+++ b/sys-libs/tapi/Manifest
@@ -1 +1,5 @@
+DIST cfe-5.0.1.src.tar.xz 11483036 BLAKE2B c4eb54cd8271b62cf7a2219db0b599b68c00b6e574d1946220efbd1633e841796e6717d6eeb35e84a6db32a731a3285b59cedeb3b1a8f3c3c502b799fdd0a720 SHA512 6619177a2ff9934fe8b15d6aa229abb8e34d0b1a75228d9efba9393daf71d6419a7256de57b31e2f9f829f71f842118556f996e86ee076f1e0a7cd394dfd31a2
+DIST clang-800.0.42.1.tar.gz 41165807 BLAKE2B 89e3ddc0268c2302f6679089648163a1b7457c3133f8f07de12c5980a66b6b7efdfa65966f5d9425ca20bd622cb1739bc009fe45edb4f0986ffd36af77a2480e SHA512 7fec6236996e4647043697f0f62d2eddb064a4604a7c64c11d2df2ff89aff95f4eb9fe1c2e604c0e276296927dd06b8a7794e0343bf0352cf65400dde40aab41
+DIST llvm-5.0.1.src.tar.xz 23428720 BLAKE2B 3db4d33df21018d17eef0042c0d8d82a8412bd5daa99cfb5405a6ec83c5774178fa76b220e8731c2a9a64dabf898aa90fe29c685327bd63a4f078e8e94a9a77e SHA512 bee1d45fca15ce725b1f2b1339b13eb6f750a3a321cfd099075477ec25835a8ca55b5366172c4aad46592dfd8afe372349ecf264f581463d017f9cee2d63c1cb
 DIST tapi-1.30.tar.gz 29071 BLAKE2B e5eb4f2eea6500d4f06c490c8b7f70070fe2ba31579133b92c1d162c33afb3c422c2fba1249734a5749455185a4fc3d79b1eb00820387990cc65fe0fc69ac55a SHA512 fa495da150c6b6ff9e0bf667a9a06f0b932363297b75379fd59a5c728168a3ac103a656d1a59fa1b0c0012a18c9874439237bbf2a3c26f9bdf202b4d78e31520
+DIST tapi-2.0.0.tar.gz 195080 BLAKE2B 28c31f4cb119525edb1a755895d8a3a05c9a606610fbf0c135790c0caf85a26d3b7e7fbbf856d001c26641a755e0d836f2f697a5856153d9dfc7c258e28427a1 SHA512 fc7209556ff75285a99ce64225831d53f9d959f7d6d9562cbfe91b019591860a00196c93de2258bbdaba02301af38990557b7e241ad3f66d09eb9440f4edf5ab

diff --git a/sys-libs/tapi/files/objcmetadata-800.0.42.1-standalone.patch b/sys-libs/tapi/files/objcmetadata-800.0.42.1-standalone.patch
new file mode 100644
index 00000000000..71ca24f1beb
--- /dev/null
+++ b/sys-libs/tapi/files/objcmetadata-800.0.42.1-standalone.patch
@@ -0,0 +1,130 @@
+Provide standalone cmake project file that allows compilation outside the LLVM
+source tree and installs the headers as well.
+
+Tune other CMakeLists for out-of-tree build.
+
+Provide missing isDynamic() method for Objective C properties. (Best-guess
+implementation based on
+https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtPropertyIntrospection.html
+and llvm-objdump -m -objc-meta-data output). Does not seem to be used anywhere
+anyways - but the control flow of the code is somewhat encrypted.
+
+Adjust to some minor API differencies between Apple clang 8.0.0 and upstream
+LLVM 5.0.1.
+
+--- objcmetadata-800.0.42.1/CMakeLists.txt.orig	2017-12-25 22:23:41.000000000 +0100
++++ objcmetadata-800.0.42.1/CMakeLists.txt	2017-12-25 20:54:39.000000000 +0100
+@@ -0,0 +1,25 @@
++cmake_minimum_required(VERSION 3.4.3)
++project(ObjCMetadata)
++
++find_package(LLVM REQUIRED CONFIG)
++set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${LLVM_CMAKE_DIR})
++include(AddLLVM)
++
++include_directories(${LLVM_INCLUDE_DIRS})
++link_directories(${LLVM_LIBRARY_DIRS})
++add_definitions(${LLVM_DEFINITIONS})
++set(LLVM_COMMON_LIBS Object Support Analysis Core)
++
++include_directories(BEFORE
++  ${CMAKE_CURRENT_BINARY_DIR}/include
++  ${CMAKE_CURRENT_SOURCE_DIR}/include
++  )
++
++install(FILES
++  include/llvm/${PROJECT_NAME}/ObjCBitcode.h
++  include/llvm/${PROJECT_NAME}/ObjCMachOBinary.h
++  include/llvm/${PROJECT_NAME}/ObjCMetadata.h
++  DESTINATION include/llvm/${PROJECT_NAME}
++  )
++
++add_subdirectory(lib/${PROJECT_NAME})
+--- objcmetadata-800.0.42.1/include/llvm/ObjCMetadata/ObjCMetadata.h.orig	2017-12-25 20:09:28.000000000 +0100
++++ objcmetadata-800.0.42.1/include/llvm/ObjCMetadata/ObjCMetadata.h	2017-12-25 20:10:11.000000000 +0100
+@@ -110,6 +110,7 @@
+   // Return empty string if doesn't exists.
+   Expected<std::string> getGetter() const;
+   Expected<std::string> getSetter() const;
++  Expected<bool> isDynamic() const;
+ };
+ 
+ class ObjCMethod : public ObjCInfoBase {
+--- objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCMetadata.cpp.orig	2017-12-25 20:09:11.000000000 +0100
++++ objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCMetadata.cpp	2017-12-25 20:13:33.000000000 +0100
+@@ -164,6 +164,20 @@
+   return setter;
+ }
+ 
++Expected<bool> ObjCProperty::isDynamic() const {
++  auto Attr = getAttribute();
++  if (!Attr)
++    return Attr.takeError();
++  // Find setter attribute.
++  SmallVector<StringRef, 4> Attrs;
++  Attr->split(Attrs, ',');
++  for (auto a : Attrs) {
++    if (a == "D")
++      return true;
++  }
++  return false;
++}
++
+ Expected<StringRef> ObjCMethod::getName() const {
+   return MetadataReader->getMethodName(*this);
+ }
+--- objcmetadata-800.0.42.1/lib/ObjCMetadata/CMakeLists.txt.orig	2017-12-25 17:29:01.000000000 +0100
++++ objcmetadata-800.0.42.1/lib/ObjCMetadata/CMakeLists.txt	2017-12-25 20:59:31.000000000 +0100
+@@ -1,3 +1,10 @@
++set(LLVM_LINK_COMPONENTS
++  Object
++  Support
++  Analysis
++  Core
++)
++
+ add_llvm_library(LLVMObjCMetadata
+   ObjCBitcode.cpp
+   ObjCMetadata.cpp
+@@ -5,7 +12,4 @@
+ 
+   ADDITIONAL_HEADER_DIRS
+   ${LLVM_MAIN_INCLUDE_DIR}/llvm/ObjCMetadata
+-
+-  DEPENDS
+-  intrinsics_gen
+   )
+--- objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCBitcode.cpp.orig	2017-12-25 17:14:29.000000000 +0100
++++ objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCBitcode.cpp	2017-12-25 17:17:51.000000000 +0100
+@@ -20,7 +20,7 @@
+ #include "llvm/IR/GlobalAlias.h"
+ #include "llvm/IR/GlobalVariable.h"
+ #include "llvm/IR/Operator.h"
+-#include "llvm/Support/Error.h"
++#include "llvm/Object/Error.h"
+ 
+ #include "macho-obj.h"
+ 
+@@ -75,7 +75,7 @@
+                Operator::getOpcode(V) == Instruction::AddrSpaceCast) {
+       V = cast<Operator>(V)->getOperand(0);
+     } else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
+-      if (GA->mayBeOverridden())
++      if (GA->isInterposable())
+         return V;
+       V = GA->getAliasee();
+     } else if (PtrToIntOperator *PTI = dyn_cast<PtrToIntOperator>(V)) {
+--- objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCMachOBinary.cpp.orig	2017-12-25 17:24:23.000000000 +0100
++++ objcmetadata-800.0.42.1/lib/ObjCMetadata/ObjCMachOBinary.cpp	2017-12-25 17:27:15.000000000 +0100
+@@ -1262,9 +1262,9 @@
+   const char *SymbolName = nullptr;
+   if (reloc_found && isExtern) {
+     offset = Symbol.getValue();
+-    ErrorOr<StringRef> NameOrError = Symbol.getName();
++    Expected<StringRef> NameOrError = Symbol.getName();
+     if (!NameOrError) {
+-      return errorOrToExpected(std::move(NameOrError));
++      return NameOrError;
+     }
+     StringRef Name = *NameOrError;
+     if (!Name.empty()) {

diff --git a/sys-libs/tapi/files/tapi-2.0.0-standalone.patch b/sys-libs/tapi/files/tapi-2.0.0-standalone.patch
new file mode 100644
index 00000000000..77bc56331df
--- /dev/null
+++ b/sys-libs/tapi/files/tapi-2.0.0-standalone.patch
@@ -0,0 +1,141 @@
+Tune CMakeLists for out-of-tree build.
+
+Adjust for API discrepancies between Apple clang-8.0.0 and upstream LLVM 5.0.1.
+
+Allow all clients to link against the library, not just ld. Main reason: Our ld
+is called ld64 when we link it.
+
+--- tapi-2.0.0/tools/tapi/CMakeLists.txt.orig	2017-12-25 22:36:06.620886714 +0100
++++ tapi-2.0.0/tools/tapi/CMakeLists.txt	2017-12-25 22:41:43.867893060 +0100
+@@ -6,6 +6,12 @@
+ 
+ target_link_libraries(tapi
+   tapiDriver
++  clangAST
++  clangFrontend
++  LLVMOption
++  LLVMDemangle
++  LLVMSupport
++  LLVMCore
+   )
+ 
+ if (TAPI_BUILD_LIBIOSSDK)
+--- tapi-2.0.0/tools/libtapi/CMakeLists.txt.orig	2017-12-25 22:26:06.816905789 +0100
++++ tapi-2.0.0/tools/libtapi/CMakeLists.txt	2017-12-25 22:31:22.914862289 +0100
+@@ -1,4 +1,7 @@
+ set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/libtapi.exports)
++set(LLVM_LINK_COMPONENTS
++  Support
++  )
+ 
+ add_tapi_library(libtapi
+   SHARED
+@@ -19,5 +22,5 @@
+ 
+ set_property(TARGET libtapi APPEND_STRING
+   PROPERTY
+-  LINK_FLAGS " -current_version ${TAPI_FULL_VERSION} -compatibility_version 1 -allowable_client ld"
++  LINK_FLAGS " -current_version ${TAPI_FULL_VERSION} -compatibility_version 1"
+   )
+--- tapi-2.0.0/tools/tapi-run/CMakeLists.txt.orig	2017-12-26 15:12:39.605057352 +0100
++++ tapi-2.0.0/tools/tapi-run/CMakeLists.txt	2017-12-26 15:15:53.304983942 +0100
+@@ -5,6 +5,8 @@
+ target_link_libraries(tapi-run
+   tapiCore
+   libtapi
++  LLVMSupport
++  LLVMCore
+   )
+ 
+ set_property(TARGET tapi-run APPEND_STRING
+--- tapi-2.0.0/CMakeLists.txt.orig	2017-12-24 15:27:56.000000000 +0100
++++ tapi-2.0.0/CMakeLists.txt	2017-12-26 15:50:01.199506782 +0100
+@@ -4,6 +4,24 @@
+   message(FATAL_ERROR "Unsupported configuration.")
+ endif()
+ 
++project(tapi)
++set(PACKAGE_VENDOR Apple CACHE STRING "")
++add_definitions(-DTAPI_BUG_REPORT_URL="https://bugs.gentoo.org/")
++
++find_package(LLVM REQUIRED CONFIG)
++set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${LLVM_CMAKE_DIR})
++include(AddLLVM)
++
++add_definitions(${LLVM_DEFINITIONS})
++include_directories(${LLVM_INCLUDE_DIRS} ${OBJCMETADATA_INCLUDE_DIRS})
++link_directories(${LLVM_LIBRARY_DIRS} ${OBJCMETADATA_LIBRARY_DIRS})
++
++# make tblgen happy
++include(TableGen)
++foreach(IPATH ${LLVM_INCLUDE_DIRS})
++  list(APPEND LLVM_TABLEGEN_FLAGS -I ${IPATH})
++endforeach(IPATH)
++
+ set(TAPI_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+ set(TAPI_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
+ 
+--- tapi-2.0.0/lib/Core/MachODylibReader.cpp.orig	2017-12-24 15:27:56.000000000 +0100
++++ tapi-2.0.0/lib/Core/MachODylibReader.cpp	2017-12-25 22:15:53.075478606 +0100
+@@ -254,8 +254,7 @@
+   auto arch = getArchType(H.cputype, H.cpusubtype);
+   assert(arch != Architecture::unknown && "unknown architecture slice");
+ 
+-  Error error = Error::success();
+-  for (const auto &symbol : object->exports(error)) {
++  for (const auto &symbol : object->exports()) {
+     StringRef name;
+     XPIKind kind;
+     std::tie(name, kind) = parseSymbol(symbol.name());
+@@ -272,7 +271,7 @@
+     file->addSymbol(kind, name, arch, flags);
+   }
+ 
+-  return error;
++  return Error::success();
+ }
+ 
+ static Error readUndefinedSymbols(MachOObjectFile *object,
+@@ -309,10 +308,7 @@
+   auto H = object->getHeader();
+   auto arch = getArchType(H.cputype, H.cpusubtype);
+ 
+-  auto error = Error::success();
+-  MachOMetadata metadata(object, error);
+-  if (error)
+-    return std::move(error);
++  MachOMetadata metadata(object);
+ 
+   ///
+   /// Classes
+--- tapi-2.0.0/lib/Driver/Snapshot.cpp.orig	2017-12-24 15:27:56.000000000 +0100
++++ tapi-2.0.0/lib/Driver/Snapshot.cpp	2017-12-26 15:49:09.864184826 +0100
+@@ -14,7 +14,7 @@
+ #include "tapi/Defines.h"
+ #include "clang/Frontend/FrontendOptions.h"
+ #include "llvm/ADT/ArrayRef.h"
+-#include "llvm/Config/config.h"
++#include "llvm/Config/llvm-config.h"
+ #include "llvm/Support/FileSystem.h"
+ #include "llvm/Support/raw_ostream.h"
+ #include "llvm/Support/xxhash.h"
+@@ -356,7 +356,7 @@
+   }
+ 
+   if (isCrash) {
+-    outs() << "PLEASE submit a bug report to " BUG_REPORT_URL
++    outs() << "PLEASE submit a bug report to " TAPI_BUG_REPORT_URL
+               " and include the "
+               "crash backtrace and snapshot.\n\n"
+               "********************************************************\n\n"
+--- tapi-2.0.0/lib/Driver/Options.cpp.orig	2017-12-25 22:17:40.506874748 +0100
++++ tapi-2.0.0/lib/Driver/Options.cpp	2017-12-25 22:18:04.181989766 +0100
+@@ -1023,7 +1023,7 @@
+   table->PrintHelp(
+       outs(),
+       (programName + " " + getNameFromTAPICommand(command)).str().c_str(),
+-      toolName, /*FlagsToInclude=*/getIncludeOptionFlagMasks(command),
++      toolName, /*FlagsToInclude=*///getIncludeOptionFlagMasks(command),
+       /*FlagsToExclude=*/0, /*ShowAllAliases=*/false);
+ }
+ 

diff --git a/sys-libs/tapi/tapi-2.0.0.ebuild b/sys-libs/tapi/tapi-2.0.0.ebuild
new file mode 100644
index 00000000000..586bd1d95c2
--- /dev/null
+++ b/sys-libs/tapi/tapi-2.0.0.ebuild
@@ -0,0 +1,177 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+: ${CMAKE_MAKEFILE_GENERATOR:=ninja}
+
+inherit cmake-utils llvm
+
+# This is a hog: We need to carve ObjCMetadata out of Apple's clang. We also
+# need llvm-tblgen and clang-tblgen because tapi uses them to generate some
+# source. It's assumed that they're only ever needed when building LLVM and
+# clang. So they don't get installed in the system and we need to compile them
+# fresh from LLVM and clang sources. And finally we need an installed LLVM and
+# clang to build tapi against.
+
+LLVM_PV=5.0.1
+LLVM_PN=llvm
+LLVM_P=${LLVM_PN}-${LLVM_PV}
+
+CLANG_PN=cfe
+CLANG_P=${CLANG_PN}-${LLVM_PV}
+
+APPLE_LLVM_PV=800.0.42.1
+APPLE_LLVM_PN=clang
+APPLE_LLVM_P=${APPLE_LLVM_PN}-${APPLE_LLVM_PV}
+
+OBJCMD_PN=objcmetadata
+OBJCMD_P=${OBJCMD_PN}-${APPLE_LLVM_PV}
+
+DESCRIPTION="Text-based Application Programming Interface"
+HOMEPAGE="https://opensource.apple.com/source/tapi"
+SRC_URI="https://opensource.apple.com/tarballs/clang/${APPLE_LLVM_P}.tar.gz
+	http://releases.llvm.org/${LLVM_PV}/${LLVM_P}.src.tar.xz
+	http://releases.llvm.org/${LLVM_PV}/${CLANG_P}.src.tar.xz"
+
+if [[ ${PV} == 9999* ]] ; then
+	EGIT_REPO_URI="https://github.com/ributzka/tapi.git"
+	TAPI_P=${P}
+	inherit git-r3
+else
+	TAPI_COMMIT=b9205695b4edee91000383695be8de5ba8e0db41
+	SRC_URI+=" https://github.com/ributzka/${PN}/archive/${TAPI_COMMIT}.tar.gz -> ${P}.tar.gz"
+	TAPI_P=${PN}-${TAPI_COMMIT}
+fi
+
+LICENSE="|| ( UoI-NCSA MIT )"
+SLOT="0"
+KEYWORDS="~x64-macos ~x86-macos"
+
+DEPEND="sys-devel/llvm:=
+	sys-devel/clang:="
+RDEPEND="${DEPEND}"
+
+DOCS=( Readme.md )
+
+LLVM_S="${WORKDIR}"/${LLVM_P}.src
+LLVM_BUILD="${WORKDIR}"/${LLVM_P}_build
+
+CLANG_S="${WORKDIR}"/${CLANG_P}.src
+
+APPLE_LLVM_S="${WORKDIR}/${APPLE_LLVM_P}"/src
+
+TAPI_S="${WORKDIR}"/${TAPI_P}
+
+# to avoid ebuild dying
+S=${WORKDIR}
+
+TAPI_BUILD="${WORKDIR}"/${P}_build
+
+OBJCMD_S="${WORKDIR}"/${OBJCMD_P}
+OBJCMD_BUILD="${WORKDIR}"/${OBJCMD_P}_build
+# put temporary install root into tapi build dir so that it does not end up on
+# libtapi's rpath
+OBJCMD_ROOT="${TAPI_BUILD}"/${OBJCMD_PN}_root
+
+src_prepare() {
+	# carve ObjCMetadata out of llvm and make it stand on its own
+	mkdir -p "${OBJCMD_S}"/{include/llvm,lib} || die
+	cd ${OBJCMD_S} || die
+	cp -r ${APPLE_LLVM_S}/include/llvm/ObjCMetadata include/llvm || die
+	cp -r ${APPLE_LLVM_S}/lib/ObjCMetadata lib || die
+	eapply "${FILESDIR}"/${OBJCMD_PN}-800.0.42.1-standalone.patch
+	CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_prepare
+
+	cd "${LLVM_S}" || die
+	CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_prepare
+
+	cd "${TAPI_S}" || die
+	eapply "${FILESDIR}"/${PN}-2.0.0-standalone.patch
+	CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_prepare
+}
+
+src_configure() {
+	# configure LLVM and clang for tablegen build
+	local mycmakeargs=(
+		# shared libs cause all kinds of problems and we don't need them just
+		# to run tblgen a couple of times
+		-DBUILD_SHARED_LIBS=OFF
+		# configure less targets to speed up configuration. We don't build them
+		# anyway.
+		-DLLVM_TARGETS_TO_BUILD=X86
+		-DLLVM_EXTERNAL_PROJECTS=clang
+		-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=${CLANG_S}
+	)
+
+	cd "${LLVM_S}" || die
+	BUILD_DIR="${LLVM_BUILD}" \
+		CMAKE_USE_DIR="${PWD}" \
+		CMAKE_BUILD_TYPE=RelWithDebInfo \
+		cmake-utils_src_configure
+
+	local llvm_prefix=$(get_llvm_prefix)
+
+	# configure ObjCMetadata
+	local mycmakeargs=(
+		# fails to compile without -std=c++11
+		-DCMAKE_CXX_STANDARD=11
+		# compile against currently installed LLVM
+		-DLLVM_DIR="${llvm_prefix}/lib/cmake/llvm"
+		# install into temporary root in work dir just so we can compile and
+		# link against it. Static lib will be pulled into libtapi and tools.
+		-DCMAKE_INSTALL_PREFIX="${OBJCMD_ROOT}"
+	)
+
+	cd "${OBJCMD_S}" || die
+	BUILD_DIR="${OBJCMD_BUILD}" \
+		CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_configure
+
+	# configure tapi
+	local mycmakeargs=(
+		# fails to compile without -std=c++11
+		-DCMAKE_CXX_STANDARD=11
+		# compile against currently installed LLVM
+		-DLLVM_DIR="${llvm_prefix}"/lib/cmake/llvm
+		# use tblgens from LLVM build directory directly. They generate source
+		# from description files. Therefore it shouldn't matter if they
+		# match up with the installed LLVM.
+		-DLLVM_TABLEGEN_EXE="${LLVM_BUILD}"/bin/llvm-tblgen
+		-DCLANG_TABLEGEN_EXE="${LLVM_BUILD}"/bin/clang-tblgen
+		# pull in includes and libs from ObjCMetadata's temporary install root
+		-DOBJCMETADATA_INCLUDE_DIRS="${OBJCMD_ROOT}"/include
+		-DOBJCMETADATA_LIBRARY_DIRS="${OBJCMD_ROOT}"/lib
+	)
+
+	cd "${TAPI_S}" || die
+	BUILD_DIR="${TAPI_BUILD}/" \
+		CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_configure
+}
+
+src_compile() {
+	# build LLVM and clang tablegen
+	cd "${LLVM_S}" || die
+	BUILD_DIR="${LLVM_BUILD}" \
+		CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_compile llvm-tblgen clang-tblgen
+
+	# build ObjCMetadata
+	cd "${OBJCMD_S}" || die
+	BUILD_DIR="${OBJCMD_BUILD}" \
+		CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_compile
+	# install into temporary root in work dir
+	cd "${OBJCMD_BUILD}" || die
+		${CMAKE_MAKEFILE_GENERATOR} install
+
+	# finally build tapi
+	cd "${TAPI_S}" || die
+	BUILD_DIR="${TAPI_BUILD}" \
+		CMAKE_USE_DIR="${PWD}" \
+		cmake-utils_src_compile
+}