On 13 Jan 2023 07:07, Sam James wrote:
> $ /tmp/libaacs/configure YACC=bison LEX=flex

the problem is you're forcing `YACC=bison`.  Automake defaults to `bison -y`
which tells bison to operate in POSIX-yacc-compatible mode because Automake's
rules target POSIX.  the end result is that you've forced a non-POSIX mode,
and bison is writing files to the cwd which is not what Automake expects.
it isn't that the src/file/ directory doesn't exist -- you can see from your
log that files have been generated in src/file/ before the failure.
-mike