set(BLST_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third-party/blst)
set(BLST_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/third-party/blst)
set(BLST_INCLUDE_DIR ${BLST_SOURCE_DIR}/bindings)

if (NOT BLST_LIB)
    if (WIN32)
      set(BLST_LIB ${BLST_BINARY_DIR}/blst.lib)
      set(BLST_BUILD_COMMAND ${BLST_SOURCE_DIR}/build.bat)
    else()
      set(BLST_LIB ${BLST_BINARY_DIR}/libblst.a)
      if (PORTABLE)
        set(BLST_BUILD_COMMAND ${BLST_SOURCE_DIR}/build.sh -D__BLST_PORTABLE__)
      else()
        set(BLST_BUILD_COMMAND ${BLST_SOURCE_DIR}/build.sh)
      endif()
    endif()

    file(MAKE_DIRECTORY ${BLST_BINARY_DIR})
    add_custom_command(
      WORKING_DIRECTORY ${BLST_BINARY_DIR}
      COMMAND ${BLST_BUILD_COMMAND}
      COMMENT "Build blst"
      DEPENDS ${BLST_SOURCE_DIR}
      OUTPUT ${BLST_LIB}
    )
else()
   message(STATUS "Use BLST: ${BLST_LIB}")
endif()

add_custom_target(blst DEPENDS ${BLST_LIB})