##===----------------------------------------------------------------------===##
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#
##===----------------------------------------------------------------------===##
#
# Build plugins for the user system if available.
#
##===----------------------------------------------------------------------===##

add_subdirectory(common)

# void build_generic_elf64(string tmachine, string tmachine_name, string tmachine_libname,
#                          string tmachine_llvm, string tmachine_triple, string elf_machine_id);
# - build a plugin for an ELF based generic 64-bit target based on libffi.
# - tmachine: name of the machine processor as used in the cmake build system.
# - tmachine_name: name of the machine to be printed with the debug messages.
# - tmachine_libname: machine name to be appended to the plugin library name.
# - tmachine_llvm: LLVM triple for the processor
# - tmachine_triple: GNU target triple
macro(build_generic_elf64 tmachine tmachine_name tmachine_libname tmachine_llvm tmachine_triple elf_machine_id)
if(CMAKE_SYSTEM_PROCESSOR MATCHES "${tmachine}$")
  # Define macro to be used as prefix of the runtime messages for this target.
  add_definitions("-DTARGET_NAME=${tmachine_name}")

  # Define debug prefix. TODO: This should be automatized in the Debug.h but
  # it requires changing the original plugins.
  add_definitions(-DDEBUG_PREFIX="TARGET ${tmachine_name} RTL")

  # Define the macro with the ELF e_machine for this target.
  add_definitions("-DTARGET_ELF_ID=${elf_machine_id}")

  # Define target triple
  add_definitions("-DLIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE=${tmachine_llvm}")

  add_llvm_library("omptarget.rtl.${tmachine_libname}"
    SHARED

    ${CMAKE_CURRENT_SOURCE_DIR}/../generic-elf-64bit/src/rtl.cpp

    ADDITIONAL_HEADER_DIRS
      ${LIBOMPTARGET_INCLUDE_DIR}

    LINK_LIBS
      PRIVATE
      PluginCommon
      ${OPENMP_PTHREAD_LIB}

    NO_INSTALL_RPATH
    BUILDTREE_ONLY
  )

  if(LIBOMPTARGET_DEP_LIBFFI_FOUND)
    libomptarget_say("Building ${tmachine_libname} plugin linked with libffi")
    if(FFI_STATIC_LIBRARIES)
      target_link_libraries(
        "omptarget.rtl.${tmachine_libname}" PRIVATE FFI::ffi_static)
    else()
      target_link_libraries(
        "omptarget.rtl.${tmachine_libname}" PRIVATE FFI::ffi)
    endif()
  else()
     libomptarget_say("Building ${tmachine_libname} plugin for dlopened libffi")
     target_sources("omptarget.rtl.${tmachine_libname}" PRIVATE
        ${CMAKE_CURRENT_SOURCE_DIR}/../generic-elf-64bit/dynamic_ffi/ffi.cpp)
     target_include_directories("omptarget.rtl.${tmachine_libname}" PRIVATE
        ${CMAKE_CURRENT_SOURCE_DIR}/../generic-elf-64bit/dynamic_ffi)
  endif()

  if(OMPT_TARGET_DEFAULT AND LIBOMPTARGET_OMPT_SUPPORT)
    target_link_libraries("omptarget.rtl.${tmachine_libname}" PRIVATE OMPT)
  endif()

  if(LIBOMP_HAVE_VERSION_SCRIPT_FLAG)
    target_link_libraries("omptarget.rtl.${tmachine_libname}" PRIVATE
      "-Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/../exports")
  endif()

  # Install plugin under the lib destination folder.
  install(TARGETS "omptarget.rtl.${tmachine_libname}"
          LIBRARY DESTINATION "${OPENMP_INSTALL_LIBDIR}")
  set_target_properties("omptarget.rtl.${tmachine_libname}" PROPERTIES
    INSTALL_RPATH "$ORIGIN" BUILD_RPATH "$ORIGIN:${CMAKE_CURRENT_BINARY_DIR}/.."
    POSITION_INDEPENDENT_CODE ON
    CXX_VISIBILITY_PRESET protected)

  target_include_directories("omptarget.rtl.${tmachine_libname}" PRIVATE
                             ${LIBOMPTARGET_INCLUDE_DIR})

  if(LIBOMPTARGET_DEP_LIBFFI_FOUND)
    list(APPEND LIBOMPTARGET_TESTED_PLUGINS "omptarget.rtl.${tmachine_libname}")
    set(LIBOMPTARGET_TESTED_PLUGINS
        "${LIBOMPTARGET_TESTED_PLUGINS}" PARENT_SCOPE)
    set(LIBOMPTARGET_SYSTEM_TARGETS
        "${LIBOMPTARGET_SYSTEM_TARGETS} ${tmachine_triple}
        ${tmachine_triple}-LTO" PARENT_SCOPE)
  else()
    libomptarget_say("Not generating ${tmachine_name} tests. LibFFI not found.")
  endif()
else()
  libomptarget_say("Not building ${tmachine_name} NextGen offloading plugin: machine not found in the system.")
endif()
endmacro()

add_subdirectory(aarch64)
add_subdirectory(amdgpu)
add_subdirectory(cuda)
add_subdirectory(ppc64)
add_subdirectory(ppc64le)
add_subdirectory(x86_64)
add_subdirectory(s390x)

# Make sure the parent scope can see the plugins that will be created.
set(LIBOMPTARGET_SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}" PARENT_SCOPE)
set(LIBOMPTARGET_TESTED_PLUGINS "${LIBOMPTARGET_TESTED_PLUGINS}" PARENT_SCOPE)