esp-idf/components/esp32/project_include.cmake

if(CONFIG_SPIRAM_CACHE_WORKAROUND AND NOT BOOTLOADER_BUILD)
    # We do this here as well as in CMakeLists.txt, because targets that
    # are not part of the ESP-IDF build system (for cases where a generic
    # non-IDF CMakeLists.txt file is imported into a component) don't depend
    # on the esp32 component so don't get the extra flag. This handles that case.
    idf_build_set_property(COMPILE_OPTIONS "-mfix-esp32-psram-cache-issue" APPEND)
    # note that we don't need to set link options as the library linked is independent of this
    if(CONFIG_SPIRAM_CACHE_WORKAROUND_STRATEGY_DUPLDST)
        idf_build_set_property(COMPILE_OPTIONS "-mfix-esp32-psram-cache-strategy=dupldst" APPEND)
    endif()
    if(CONFIG_SPIRAM_CACHE_WORKAROUND_STRATEGY_MEMW)
        idf_build_set_property(COMPILE_OPTIONS "-mfix-esp32-psram-cache-strategy=memw" APPEND)
    endif()
    if(CONFIG_SPIRAM_CACHE_WORKAROUND_STRATEGY_NOPS)
        idf_build_set_property(COMPILE_OPTIONS "-mfix-esp32-psram-cache-strategy=nops" APPEND)
    endif()
endif()