Date:	Wed, 30 Jul 1997 11:51:14 -0700 (PDT)
Message-Id:	<199707301851.LAA11762@adit.ap.net>
Mime-Version:	1.0
To:	darn AT xl DOT ca
From:	Nate Eldredge <eldredge AT ap DOT net>
Subject:	Re: custom entry/exit code
Cc:	djgpp AT delorie DOT com

You wrote:
>How do I link my own extra entry/exit code into a c project?

Okay, here are three ways, in increasing order of difficulty.

- Run your entry code at the beginning of `main', and use `atexit' to set up
exit code. (Trivial, but often sufficient.)

- Use the GNU extensions "constructor" and "destructor". That would look
something like this:

void hello(void) __attribute__ ((constructor));
void bye(void) __attribute__ ((destructor));

void hello(void) { /* ... do stuff ... */ }
void bye(void) { /* ... do more stuff ... */ }

- Rewrite crt0.o.

Nate Eldredge
eldredge AT ap DOT net

- Raw text -