Implement -s.

Triggered by recent FreeBSD changes.

- emits #line directives at every file change (like FreeBSD)
- maintains a synch_lineno variable to verify when the output gets out
of synch with the input, so that it can emit #line to re-synch as well
(unlike FreeBSD)

To do: either handle \end-of-line, or recognize when a macro expansion
is in progress, so that line synch don't perturb cpp on multi-line
expansions.

With this, we should have a fully POSIX-compliant m4.

ok miod@

0 files changed, 0 insertions, 0 deletions