Re: __main undefined symbol

[William Gatliff <gatliff at haulpak dot com>]

Scott A Sumner wrote:

> I tried the _main() wart trick on my embedded system, but got a linker error so
> had to back it out.

Are you saying that the _main() wart was the origin of the linker bug?

Hmmm.... are you sure you aren't compiling C++?  I'm not exactly sure what the
proper signature for _main() is, is why I ask...

> Time to vent:  On a related (startup code) and again frustrating note, my
> implementation of gcc requires me to have a crt0.o file.  This is not so
> bad in itself (although I can't rename it or change its extension), but what
> bugs me to no end is that it has to be in a subdirectory in the compiler's
> directory tree.

The -nostartfiles switch tells gcc to not use the installed crt0.  See also the
-nodefaultlibs and -nostdlib switches for related behavior.

Once you throw the -nostartfiles switch, you're free to do whatever you want
startup-wise.  Probably should include a call to main() somewhere, of course.
:^)

b.g.

--
William A. Gatliff
Senior Design Engineer
Komatsu Mining Systems
To teach is to learn.




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