Example for compiling as1:
1. g++ recomp.cpp -o recomp -g -lcapstone
2. ./recomp ~/ido7.1_compiler/usr/lib/as1 > as1_c.c
3. make sure as1_c.c is the file to be included in skeleton.c
4. gcc skeleton.c -c -o as1_c.o -g -fno-strict-aliasing
5. gcc libc_impl.c as1_c.o -o as1 -g -fno-strict-aliasing -lm -no-pie -DIDO71
Use the same approach for cc, cfe, uopt, ugen, as1 (and copt if you need that).
Use -DIDO53 instead of -DIDO71 if the program you are trying to recompile was compiled with IDO 5.3 rather than IDO 7.1.
You can add -O2 to step 4 and step 5. Using -O2 in step 4 will however take a few minutes and use up to 11 GB for uopt. Don't use -O2 on copt unless you have >= 32 GB RAM and can wait at least half an hour.