# MIT License
#
# Copyright (c) 2019-2025 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
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# SOFTWARE.

if(${LINK_HIP_DEVICE_LIBS})
    list(APPEND CMAKE_PREFIX_PATH /opt/rocm /opt/rocm/hip)
    find_package(hip REQUIRED CONFIG PATHS /opt/rocm)
endif()

if(HIP_COMPILER STREQUAL "nvcc")
    message(FATAL_ERROR "rocThrust does not support the CUDA backend.")
endif()

if(${LINK_HIP_DEVICE_LIBS})
    # When building for HIP, make sure we have a hip-aware clang.
    if(HIP_COMPILER STREQUAL "clang")
        if(USE_HIPCXX)
            if(NOT (CMAKE_HIP_COMPILER MATCHES ".*hipcc$" OR CMAKE_HIP_COMPILER MATCHES ".*clang\\+\\+"))
                message(FATAL_ERROR "When LINK_HIP_DEVICE_LIBS is set to 'ON', then 'hipcc' or a HIP-aware Clang must be used as the C++ compiler.")
            endif()
        else()
            if(NOT (CMAKE_CXX_COMPILER MATCHES ".*hipcc$" OR CMAKE_CXX_COMPILER MATCHES ".*clang\\+\\+"))
                message(FATAL_ERROR "When LINK_HIP_DEVICE_LIBS is set to 'ON', then 'hipcc' or a HIP-aware Clang must be used as the C++ compiler.")
            endif()
        endif()
    else()
        message(FATAL_ERROR "When LINK_HIP_DEVICE_LIBS is set to 'ON', HIP_COMPILER must be `clang` (AMD ROCm platform)")
    endif()
endif()