#
# Copyright 2023 Benjamin Worpitz, Jeffrey Kelling, Bernhard Manfred Gruber, René Widera, Jan Stephan
# SPDX-License-Identifier: MPL-2.0
#

#-------------------------------------------------------------------------------
# Compiler settings.
#-------------------------------------------------------------------------------
if(alpaka_ACC_GPU_CUDA_ENABLE AND (CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA"))
    if(alpaka_ENABLE_WERROR)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Wreorder>")
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Wdefault-stream-launch>")
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Wext-lambda-captures-this>")
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Werror all-warnings>")
    else()
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Wdefault-stream-launch>")
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--Werror default-stream-launch>")
    endif()
    if(CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL 11.3)
        # supress error in Catch: 'error #177-D: variable "<unnamed>::autoRegistrar1" was declared but never referenced'
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:--diag-suppress 177>")
    endif()
endif()

if(MSVC)
    # Force to always compile with W4
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:/W4>"
                                           "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler /W4>")
    if(alpaka_ENABLE_WERROR)
        # WX treats warnings as errors
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:/WX>"
                                               "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler /WX>")
    endif()
    # Improve debugging.
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<AND:$<CONFIG:Debug>,$<COMPILE_LANGUAGE:CXX>>:SHELL:/Zo>"
                                           "$<$<AND:$<CONFIG:Debug>,$<COMPILE_LANGUAGE:CUDA>>:SHELL:-Xcompiler /Zo>")

    # Flags added in Visual Studio 2013
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:/Zc:throwingNew>"
                                           "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler /Zc:throwingNew>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:/Zc:strictStrings>"
                                           "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler /Zc:strictStrings>")

    # Flags added in Visual Studio 2015
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:/permissive->"
                                           "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler /permissive->")
endif()

if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wall")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wextra")
    # Turn off -pedantic when compiling CUDA code, otherwise the CI logs are flooded with warnings. gcc doesn't like nvcc's code transformations.
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-pedantic>"
                                           "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -Wno-pedantic>")
    if(alpaka_ENABLE_WERROR)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-Werror>"
                                               "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -Werror>")
    endif()
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wdouble-promotion")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wmissing-include-dirs")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wconversion")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wunknown-pragmas")
    # Higher levels (max is 5) produce some strange warnings
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wstrict-overflow=2")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wtrampolines")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wfloat-equal")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wundef")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wshadow")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wcast-qual")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wcast-align")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wwrite-strings")
    # Too noisy as it warns for every operation using numeric types smaller than int.
    # Such values are converted to int implicitly before the calculation is done.
    # E.g.: uint16_t = uint16_t * uint16_t will trigger the following warning:
    # conversion to ‘short unsigned int’ from ‘int’ may alter its value
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wconversion")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsign-conversion")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wvector-operation-performance")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-Wzero-as-null-pointer-constant>") # occurs in nvcc-generated code
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wdate-time")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-Wuseless-cast>") # occurs in nvcc-generated code
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wlogical-op")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-aggressive-loop-optimizations")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wmissing-declarations")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-multichar")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wopenmp-simd")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wpacked")
    # Too much noise
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wpadded")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wredundant-decls")
    # Too much noise
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Winline")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wdisabled-optimization")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wformat-nonliteral")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wformat-security")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wformat-y2k")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wctor-dtor-privacy")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wdelete-non-virtual-dtor")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wliteral-suffix")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wnon-virtual-dtor")
    # This warns about members that have not explicitly been listed in the constructor initializer list.
    # This could be useful even for members that have a default constructor.
    # However, it also issues this warning for defaulted constructurs.
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Weffc++")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Woverloaded-virtual")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsign-promo")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wconditionally-supported")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wnoexcept")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CXX>:SHELL:-Wold-style-cast>") # occurs in nvcc-generated code
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsuggest-final-types")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsuggest-final-methods")
    # This does not work correctly as it suggests override to methods that are already marked with final.
    # Because final implies override, this is not useful.
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsuggest-override")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wnormalized")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wformat-signedness")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wnull-dereference")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wduplicated-cond")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wsubobject-linkage")
    # This warning might be useful but it is triggered by compile-time code where it does not make any sense:
    # E.g. "Vec<DimInt<(TidxDimOut < TidxDimIn) ? TidxDimIn : TidxDimOut>, TElem>" when both values are equal
    #list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wduplicated-branches")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Walloc-zero")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Walloca")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wcast-align=strict")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:CUDA>:SHELL:-Xcompiler -Wno-unused-value>") # occurs in nvcc-generated code
endif()

# Clang, AppleClang, ICPX
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
    if(alpaka_ENABLE_WERROR)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<IF:$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>,SHELL:-Xcompiler -Werror,-Werror>")
    endif()
    # Weverything really means everything (including Wall, Wextra, pedantic, ...)
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Weverything")
    # We are not C++98 compatible
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-c++98-compat")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-c++98-compat-pedantic")
    # disable warnings, that C++20 features are not backwards compatible to C++17 and older
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-c++20-compat")
    # Triggered by inline constants
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-global-constructors")
    # This padding warning is generated by the execution tasks depending on the argument types
    # as they are stored as members. Therefore, the padding warning is triggered by the calling code
    # and does not indicate a failure within alpaka.
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-padded")
    # Triggers for all instances of alpaka_DEBUG_MINIMAL_LOG_SCOPE and similar macros followed by semicolon
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-extra-semi-stmt")

    # Silence warnings caused by nvcc-generated code and -Weverything
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-missing-noreturn>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-missing-variable-declarations>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-old-style-cast>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-overlength-strings>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-reserved-id-macro>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-unused-macros>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-used-but-marked-unused>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-zero-as-null-pointer-constant>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-unreachable-code>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-extra-semi>")
    list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-deprecated>")
    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 13.0)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-reserved-identifier>")
    endif()
    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 15.0)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-gnu-line-marker>")
    endif()
    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 10.0)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "$<$<COMPILE_LANG_AND_ID:CUDA,NVIDIA>:SHELL:-Xcompiler -Wno-deprecated-copy>")
    endif()

    if(CMAKE_SYSTEM_NAME STREQUAL "Darwin" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 12.0)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-poison-system-directories")
    endif()

    if(alpaka_ACC_GPU_HIP_ENABLE)
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-unused-command-line-argument")
        if(HIP_VERSION VERSION_LESS_EQUAL 5.3)
            # avoid error:
            #  rocrand/rocrand_common.h:73:6: error: "Disabled inline asm, because
            #  the build target does not support it." [-Werror,-W#warnings]
            #  #warning "Disabled inline asm, because the build target does not support it."
            list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-error=#warnings")
        endif()
    endif()

    if(${CMAKE_CXX_COMPILER_ID} STREQUAL "IntelLLVM")
        # fast math is turned on by default with ICPX, which breaks our unit tests
        list(APPEND alpaka_DEV_COMPILE_OPTIONS "-fp-model=precise")

        if (alpaka_ACC_SYCL_ENABLE)
            # avoid: warning: disabled expansion of recursive macro
            list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-disabled-macro-expansion")
            list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-reserved-identifier")
            list(APPEND alpaka_DEV_COMPILE_OPTIONS "-Wno-old-style-cast")
        endif()
    endif()
endif()