llvm-project/openmp/CMakeLists.txt

cmake_minimum_required(VERSION 2.8 FATAL_ERROR)

# Add cmake directory to search for custom cmake functions.
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})

# llvm/runtimes/ will set OPENMP_STANDALONE_BUILD.
if (OPENMP_STANDALONE_BUILD OR "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
  set(OPENMP_STANDALONE_BUILD TRUE)
  project(openmp C CXX)

  # CMAKE_BUILD_TYPE was not set, default to Release.
  if (NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Release)
  endif()

  # Group common settings.
  set(OPENMP_ENABLE_WERROR FALSE CACHE BOOL
    "Enable -Werror flags to turn warnings into errors for supporting compilers.")
  set(OPENMP_LIBDIR_SUFFIX "" CACHE STRING
    "suffix of lib installation directory, e.g. 64 => lib64")

  set(OPENMP_LLVM_TOOLS_DIR "" CACHE PATH "Path to LLVM tools for testing.")
else()
  set(OPENMP_ENABLE_WERROR ${LLVM_ENABLE_WERROR})
  # If building in tree, we honor the same install suffix LLVM uses.
  set(OPENMP_LIBDIR_SUFFIX ${LLVM_LIBDIR_SUFFIX})
endif()

# Check and set up common compiler flags.
include(config-ix)
include(HandleOpenMPOptions)


# Build host runtime library.
add_subdirectory(runtime)


set(ENABLE_LIBOMPTARGET ON)
# Currently libomptarget cannot be compiled on Windows or MacOS X.
# Since the device plugins are only supported on Linux anyway,
# there is no point in trying to compile libomptarget on other OSes.
if (APPLE OR WIN32 OR NOT OPENMP_HAVE_STD_CPP11_FLAG)
  set(ENABLE_LIBOMPTARGET OFF)
endif()

option(OPENMP_ENABLE_LIBOMPTARGET "Enable building libomptarget for offloading."
       ${ENABLE_LIBOMPTARGET})
if (OPENMP_ENABLE_LIBOMPTARGET)
  # Check that the library can acutally be built.
  if (APPLE OR WIN32)
    message(FATAL_ERROR "libomptarget cannot be built on Windows and MacOS X!")
  elseif (NOT OPENMP_HAVE_STD_CPP11_FLAG)
    message(FATAL_ERROR "Host compiler must support C++11 to build libomptarget!")
  endif()

  add_subdirectory(libomptarget)
endif()