The problem is the first error message. GCC doesn't exit immediately because maybe the package will compile without it. But it doesn't:
Code:
checkpolicy.c:73:37: error: sepol/policydb/policydb.h: No such file or directory
checkpolicy.c:74:37: error: sepol/policydb/services.h: No such file or directory
checkpolicy.c:75:40: error: sepol/policydb/conditional.h: No such file or directory
