FE8J-capable agbcc package for decomp.me and fireemblem8j.
Source: pret/agbcc da598c1 plus the default-off FE8J target flags on branch fe8j. -mjp-promote preserves signed sub-word promotion and enables declaration-order function-argument promotion. -mjp-nocrossjump and -mjp-regorder are included as documented default-off experimental profiles.
Without an FE8J flag, generated .text matches stock agbcc for the validated project cases. The packaged compiler produced a clean byte-perfect fireemblem8j rebuild (fireemblem8.gba: OK).