libmcrypt: error: type defaults to 'int' in declaration of 'foo'

[BKPepe]

Maintainer: @flyn-org
Env: OpenWrt daily snapshot, aarch64_cortex-a53

Log:

mcrypt_symb.c:5:8: error: type defaults to 'int' in declaration of 'cbc_LTX__init_mcrypt' [-Wimplicit-int]
    5 | extern cbc_LTX__init_mcrypt();
      |        ^~~~~~~~~~~~~~~~~~~~
mcrypt_symb.c:6:8: error: type defaults to 'int' in declaration of 'cbc_LTX__mcrypt_set_state' [-Wimplicit-int]
    6 | extern cbc_LTX__mcrypt_set_state();
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~
and so on... 

Full log is available: https://downloads.openwrt.org/snapshots/faillogs/aarch64_cortex-a53/packages/libmcrypt/compile.txt