include_guard()

include(CheckCXXSourceCompiles)
include(CMakePushCheckState)

function(target_enable_sanitizers _target)
    if(MSVC)
        set(_compile_options /fsanitize=address)
        set(_link_options /INCREMENTAL:NO)
        # Use the same settings for this target and the capability check.
        set_property(TARGET ${_target} PROPERTY MSVC_RUNTIME_CHECKS "")
        set_property(TARGET ${_target} PROPERTY MSVC_DEBUG_INFORMATION_FORMAT ProgramDatabase)
        set(CMAKE_MSVC_RUNTIME_CHECKS "")
        set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT ProgramDatabase)
    elseif(CMAKE_CXX_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
        set(_compile_options -fsanitize=address,undefined -fno-sanitize-recover=undefined -fno-omit-frame-pointer)
        set(_link_options -fsanitize=address,undefined)
    else()
        message(FATAL_ERROR "Sanitizers are not configured for ${CMAKE_CXX_COMPILER_ID}")
    endif()

    cmake_push_check_state(RESET)
    string(JOIN " " CMAKE_REQUIRED_FLAGS ${_compile_options})
    set(CMAKE_REQUIRED_LINK_OPTIONS ${_link_options})
    set(CMAKE_TRY_COMPILE_TARGET_TYPE EXECUTABLE)
    check_cxx_source_compiles("int main() { return 0; }" REPO_LENS_SANITIZERS_SUPPORTED)
    cmake_pop_check_state()
    if(NOT REPO_LENS_SANITIZERS_SUPPORTED)
        message(FATAL_ERROR "The requested sanitizer configuration cannot compile and link. Check compiler/runtime installation or configure with ENABLE_SANITIZERS=OFF.")
    endif()

    target_compile_options(${_target} PRIVATE ${_compile_options})
    target_link_options(${_target} PRIVATE ${_link_options})
endfunction()