cmake/DownloadWangle.cmake

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#
#   http://www.apache.org/licenses/LICENSE-2.0
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## Download facebook's wangle library. 
## SOURCE_DIR is typically the cmake source directory
## BINARY_DIR is the build directory, typically 'build'

function(download_wangle SOURCE_DIR BUILD_DIR)
  set(WANGLE_DOWNLOAD_DIR "${BUILD_DIR}/dependencies/facebook-wangle-proj-download")
  set(WANGLE_SOURCE_DIR "${BUILD_DIR}/dependencies/facebook-wangle-proj-src")
  set(WANGLE_INSTALL_DIR "${BUILD_DIR}/dependencies/facebook-wangle-proj-install")
  if (DOWNLOAD_DEPENDENCIES)
    set(PATCH_FOLLY ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/cmake/folly/local/FindFolly.cmake" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/boost/local/FindBoost.cmake" "${WANGLE_SOURCE_DIR}/wangle/cmake")
  else()
    set(PATCH_FOLLY "")
  endif() 
	
  ExternalProject_Add(
     facebook-wangle-proj
     URL "https://github.com/facebook/wangle/archive/v2017.09.04.00.tar.gz"
     PREFIX "${BUILD_DIR}/dependencies"
     DOWNLOAD_DIR ${WANGLE_DOWNLOAD_DIR}
     SOURCE_DIR ${WANGLE_SOURCE_DIR}
     PATCH_COMMAND ${PATCH_FOLLY}
     INSTALL_DIR ${WANGLE_INSTALL_DIR}
     CONFIGURE_COMMAND ${CMAKE_COMMAND} -DBUILD_EXAMPLES=OFF -DCMAKE_CROSSCOMPILING=ON -DBUILD_TESTS=OFF -DFOLLY_ROOT_DIR=${FOLLY_ROOT_DIR} -DBOOST_ROOT=${BOOST_ROOT} -DCMAKE_INSTALL_PREFIX:PATH=${WANGLE_INSTALL_DIR} "${WANGLE_SOURCE_DIR}/wangle" # Tell CMake to use subdirectory as source.
  )
  set(WANGLE_ROOT_DIR ${WANGLE_INSTALL_DIR} CACHE STRING "" FORCE)
endfunction(download_wangle)