# Get sources
set(LIBCXXABI_SOURCES
  # C++ABI files
  cxa_aux_runtime.cpp
  cxa_default_handlers.cpp
  cxa_demangle.cpp
  cxa_exception_storage.cpp
  cxa_guard.cpp
  cxa_handlers.cpp
  cxa_new_delete.cpp
  cxa_unexpected.cpp
  cxa_vector.cpp
  cxa_virtual.cpp
  # C++ STL files
  stdlib_exception.cpp
  stdlib_stdexcept.cpp
  stdlib_typeinfo.cpp
  # Internal files
  abort_message.cpp
  fallback_malloc.cpp
  private_typeinfo.cpp
)

if (LIBCXXABI_ENABLE_EXCEPTIONS)
  list(APPEND LIBCXXABI_SOURCES cxa_exception.cpp)
  list(APPEND LIBCXXABI_SOURCES cxa_personality.cpp)
else()
  list(APPEND LIBCXXABI_SOURCES cxa_noexception.cpp)
endif()

if (LIBCXXABI_ENABLE_THREADS AND UNIX AND NOT (APPLE OR CYGWIN))
  list(APPEND LIBCXXABI_SOURCES cxa_thread_atexit.cpp)
endif()

set(LIBCXXABI_HEADERS ../include/cxxabi.h)

# Add all the headers to the project for IDEs.
if (MSVC_IDE OR XCODE)
  # Force them all into the headers dir on MSVC, otherwise they end up at
  # project scope because they don't have extensions.
  if (MSVC_IDE)
    source_group("Header Files" FILES ${LIBCXXABI_HEADERS})
  endif()
endif()

include_directories("${LIBCXXABI_LIBCXX_INCLUDES}")

if (LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
  add_definitions(-DHAVE___CXA_THREAD_ATEXIT_IMPL)
endif()

# Generate library list
set(libraries ${LIBCXXABI_CXX_ABI_LIBRARIES})

if (LIBCXXABI_ENABLE_THREADS)
  append_if(libraries LIBCXXABI_HAS_PTHREAD_LIB pthread)
endif()

append_if(libraries LIBCXXABI_HAS_C_LIB c)
if (LIBCXXABI_USE_LLVM_UNWINDER)
  # Prefer using the in-tree version of libunwind, either shared or static. If
  # none are found fall back to using -lunwind.
  # FIXME: Is it correct to prefer the static version of libunwind?
  if (TARGET unwind_shared)
    list(APPEND libraries unwind_shared)
  elseif(TARGET unwind_static)
    list(APPEND libraries unwind_static)
  else()
    list(APPEND libraries unwind)
  endif()
else()
  append_if(libraries LIBCXXABI_HAS_GCC_S_LIB gcc_s)
endif()

# Setup flags.
append_if(LIBCXXABI_COMPILE_FLAGS LIBCXXABI_HAS_FPIC_FLAG -fPIC)
append_if(LIBCXXABI_LINK_FLAGS LIBCXXABI_HAS_NODEFAULTLIBS_FLAG -nodefaultlibs)

set(LIBCXXABI_SHARED_LINK_FLAGS)

if ( APPLE )
  if ( CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.6" )
    list(APPEND LIBCXXABI_COMPILE_FLAGS "-U__STRICT_ANSI__")
    list(APPEND LIBCXXABI_SHARED_LINK_FLAGS
      "-compatibility_version 1"
      "-current_version 1"
      "-install_name /usr/lib/libc++abi.1.dylib")
    list(APPEND LIBCXXABI_LINK_FLAGS
        "/usr/lib/libSystem.B.dylib")
  else()
    list(APPEND LIBCXXABI_SHARED_LINK_FLAGS
      "-compatibility_version 1"
      "-install_name /usr/lib/libc++abi.1.dylib")
  endif()
endif()

string(REPLACE ";" " " LIBCXXABI_COMPILE_FLAGS "${LIBCXXABI_COMPILE_FLAGS}")
string(REPLACE ";" " " LIBCXXABI_LINK_FLAGS "${LIBCXXABI_LINK_FLAGS}")
string(REPLACE ";" " " LIBCXXABI_SHARED_LINK_FLAGS "${LIBCXXABI_SHARED_LINK_FLAGS}")

# FIXME: libc++abi.so will not link when modules are enabled because it depends
# on symbols defined in libc++.so which has not yet been built.
if (LLVM_ENABLE_MODULES)
  string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
endif()

# Add a object library that contains the compiled source files.
add_library(cxxabi_objects OBJECT ${LIBCXXABI_SOURCES} ${LIBCXXABI_HEADERS})

set_target_properties(cxxabi_objects
  PROPERTIES
    COMPILE_FLAGS "${LIBCXXABI_COMPILE_FLAGS}"
  )

set(LIBCXXABI_TARGETS)

# Build the shared library.
if (LIBCXXABI_ENABLE_SHARED)
  add_library(cxxabi_shared SHARED $<TARGET_OBJECTS:cxxabi_objects>)
  target_link_libraries(cxxabi_shared ${libraries})
  set_target_properties(cxxabi_shared
    PROPERTIES
      LINK_FLAGS    "${LIBCXXABI_LINK_FLAGS} ${LIBCXXABI_SHARED_LINK_FLAGS}"
      OUTPUT_NAME   "c++abi"
      VERSION       "1.0"
      SOVERSION     "1"
    )
  list(APPEND LIBCXXABI_TARGETS "cxxabi_shared")
endif()

# Build the static library.
if (LIBCXXABI_ENABLE_STATIC)
  add_library(cxxabi_static STATIC $<TARGET_OBJECTS:cxxabi_objects>)
  target_link_libraries(cxxabi_static ${libraries})
  set_target_properties(cxxabi_static
    PROPERTIES
      LINK_FLAGS    "${LIBCXXABI_LINK_FLAGS}"
      OUTPUT_NAME   "c++abi"
  )
  list(APPEND LIBCXXABI_TARGETS "cxxabi_static")
endif()

# Add a meta-target for both libraries.
add_custom_target(cxxabi DEPENDS ${LIBCXXABI_TARGETS})

install(TARGETS ${LIBCXXABI_TARGETS}
  LIBRARY DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
  ARCHIVE DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
  )

if (NOT CMAKE_CONFIGURATION_TYPES)
  add_custom_target(install-cxxabi
    DEPENDS cxxabi
    COMMAND "${CMAKE_COMMAND}"
            -DCMAKE_INSTALL_COMPONENT=cxxabi
            -P "${LIBCXXABI_BINARY_DIR}/cmake_install.cmake")

  # TODO: This is a legacy target name and should be removed at some point.
  add_custom_target(install-libcxxabi DEPENDS install-cxxabi)
endif()