pkg:setup
mkdir native
cd native
MACOSX_DEPLOYMENT_TARGET=10.9 CC="$(xcrun -f clang) -stdlib=libc++" CXX="$(xcrun -f clang++) -stdlib=libc++" cmake -j16 -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_SYSTEM_NAME=Darwin -DUSE_NLS=0 -DWITH_DOC=0 -DLLVM_INCLUDE_TESTS=OFF ../src/apple-llvm/src
make -j16 llvm-tblgen
cd ..
mkdir build
cd build

cat >iphoneos_toolchain.cmake <<EOF
set(CMAKE_SYSTEM_NAME Darwin)  # Tell CMake we're cross-compiling
set(CMAKE_CROSSCOMPILING true)
#include(CMakeForceCompiler)
# Prefix detection only works with compiler id "GNU"
# CMake will look for prefixed g++, cpp, ld, etc. automatically
set(CMAKE_SYSTEM_PROCESSOR aarch64)
set(triple ${PKG_TARG})
set(CMAKE_FIND_ROOT_PATH $(echo ${PKG_PATH} | sed -e s/:/' '/g))
set(CMAKE_LIBRARY_PATH $(echo ${LIBRARY_PATH} | sed -e s/:/' '/g))
set(CMAKE_INCLUDE_PATH $(echo ${INCLUDE_PATH} | sed -e s/:/' '/g))
set(CMAKE_C_COMPILER ${PKG_TARG}-gcc)
set(CMAKE_CXX_COMPILER ${PKG_TARG}-g++)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
EOF

unset MACOSX_DEPLOYMENT_TARGET
cmake -j8 -DCMAKE_TOOLCHAIN_FILE=iphoneos_toolchain.cmake -DCMAKE_LOCALSTATEDIR="/private/var" -DCMAKE_INSTALL_NAME_DIR="/usr/lib" -DCMAKE_INSTALL_RPATH="/usr/" -DCMAKE_OSX_SYSROOT="${PKG_ROOT}" -DCMAKE_INSTALL_PREFIX="/usr/" -DCMAKE_SHARED_LINKER_FLAGS="-lresolv" -DCURRENT_VENDOR=debian -DUSE_NLS=0 -DWITH_DOC=0 -DLLVM_INCLUDE_TESTS=OFF -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_SYSTEM_NAME=Darwin -DLLVM_TABLEGEN="$(pwd)/../native/bin/llvm-tblgen" -DLLVM_DEFAULT_TARGET_TRIPLE="${PKG_TARG}" -DLLVM_TARGETS_TO_BUILD=AArch64 ../src/apple-llvm/src

make -j16 libtapi
make install-libtapi DESTDIR="${PKG_DEST}"
pkg: mkdir -p /usr/include/tapi
pkg: cp -va ../src/apple-llvm/src/projects/libtapi/include/tapi /usr/include
pkg: cp -va projects/libtapi/include/tapi/Version.inc /usr/include/tapi
cd ..