esp-idf/components/esp32/linker.lf

[mapping:esp32]
archive: libesp32.a
entries:
    panic (noflash)

[mapping:gcc]
archive: libgcc.a
entries:
    lib2funcs (noflash_text)
    _divsf3 (noflash)

[mapping:gcov]
archive: libgcov.a
entries:
    * (noflash)