# AddressSanitizer / UndefinedBehaviorSanitizer wiring.
# Enabled per build via -DPDFENGINE_ENABLE_SANITIZERS=ON (see the *-asan presets).
# Usage:  pdfengine_enable_sanitizers(<target>)
#
# Coverage by platform:
#   MSVC        -> ASan only (/fsanitize=address). UBSan/TSan unsupported.
#   GCC/Clang   -> ASan + UBSan.
# TSan is intentionally not wired here yet; it conflicts with ASan and is only
# relevant once the engine is multithreaded (Phase 3+).

function(pdfengine_enable_sanitizers target)
    if(NOT PDFENGINE_ENABLE_SANITIZERS)
        return()
    endif()

    if(MSVC)
        message(STATUS "Sanitizers: AddressSanitizer enabled for '${target}' (MSVC)")
        target_compile_options(${target} PRIVATE /fsanitize=address)
        # ASan on MSVC is incompatible with the /RTC runtime checks and incremental link.
        target_compile_options(${target} PRIVATE /Zi)
        target_link_options(${target} PRIVATE /INCREMENTAL:NO)
    else()
        message(STATUS "Sanitizers: Address + UndefinedBehavior enabled for '${target}'")
        set(_flags -fsanitize=address,undefined -fno-omit-frame-pointer -fno-sanitize-recover=all)
        target_compile_options(${target} PRIVATE ${_flags} -g)
        target_link_options(${target} PRIVATE ${_flags})
    endif()
endfunction()