Xref:	news2.mv.net comp.os.msdos.djgpp:2906
Newsgroups:	comp.os.msdos.djgpp
Subject:	How safe is this?
Message-ID:	<4laoi6$cgk@groa.uct.ac.za>
From:	fnunez AT cs DOT uct DOT ac DOT za (Fabian Nunez)
Date:	20 Apr 1996 13:24:22 GMT
Organization:	University of Cape Town
NNTP-Posting-Host:	phoebe.cs.uct.ac.za
Lines:	30
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi all!

Last night I was fooling around and the idea struck me of making a function
run automatically before main() starts up. I thought about it for a while and
came up with this little gem:

/* autostart.cc */

extern "C" void start(void);

class __autorun__
{
  public:
  __autorun__(void) { start(); };
} __autorun__;


Compiling this sucker to a .o file and linking it with plain C programs
(for C++ programs change 'extern "C"' to just 'extern') will cause a function
called 'start' to run before main().

My question is - how save and/or portable is this?

Thanks
Fabian
--
Fabian Nunez, Bachelor of Computer Science, University of Cape Town
email:fnunez AT cs DOT uct DOT ac DOT za   web:http//www.cs.uct.ac.za/~fnunez
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