pkg:setup
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

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/" -DCURRENT_VENDOR=debian -DUSE_NLS=0 -DWITH_DOC=0 ..
pkg:make -j8
pkg:install