# MIT License
#
# Copyright (c) 2020 Advanced Micro Devices, Inc. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

# Dependencies

# HIP dependency is handled earlier in the project cmake file
# when VerifyCompiler.cmake is included.

# GIT

# Test dependencies

# For downloading, building, and installing required dependencies
include(cmake/DownloadProject.cmake)

if(ENABLE_MSCCLPP)
    set(MSCCLPP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/ext/mscclpp CACHE PATH "")
    execute_process(
        COMMAND mkdir -p ${MSCCLPP_ROOT}
    )
    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
    find_package(mscclpp_nccl)

    if(NOT mscclpp_nccl_FOUND)
        message(STATUS "MSCCL++ not found. Downloading and building MSCCL++ only for gfx942.")
        # Download, build and install mscclpp
    
        download_project(PROJ                mscclpp_nccl
                         GIT_REPOSITORY      https://github.com/microsoft/mscclpp.git
                         GIT_TAG             b1b9d0626cfa40319c18c05f8c16650568395c29
                         INSTALL_DIR         ${MSCCLPP_ROOT}
                         CMAKE_ARGS          -DGPU_TARGETS=gfx942 -DBYPASS_GPU_CHECK=ON -DUSE_ROCM=ON -DCMAKE_BUILD_TYPE=Release -DBUILD_APPS_NCCL=ON -DBUILD_PYTHON_BINDINGS=OFF -DBUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
                         LOG_DOWNLOAD        FALSE
                         LOG_CONFIGURE       FALSE
                         LOG_BUILD           FALSE
                         LOG_INSTALL         FALSE
                         UPDATE_DISCONNECTED TRUE
        )

        find_package(mscclpp_nccl REQUIRED)
    endif()

    # Copy the outputs to the PROJECT_BINARY_DIR, list them in MSCCLPP_OUT_LIBS
    file(GLOB MSCCLPP_LIB_FILES "${MSCCLPP_ROOT}/lib/*")
    file(GLOB MSCCLPP_LIB_NAMES RELATIVE ${MSCCLPP_ROOT}/lib "${MSCCLPP_ROOT}/lib/*")
    set(MSCCLPP_OUT_LIBS "")
    foreach(LIB_NAME ${MSCCLPP_LIB_NAMES})
        list(APPEND MSCCLPP_OUT_LIBS ${PROJECT_BINARY_DIR}/${LIB_NAME})
    endforeach()  
    file(COPY ${MSCCLPP_LIB_FILES} DESTINATION ${PROJECT_BINARY_DIR})
endif()