Re: pow function w/o math.h

From:
Ulrich Eckhardt <eckhardt@satorlaser.com>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 17 Sep 2009 13:22:32 +0200
Message-ID:
<ooi9o6-mil.ln1@satorlaser.homedns.org>
zagreb wrote:

I understand that (about prototype).


So why did you even mention that you are receiving strange results?

But why is vc linking math library without my request (this can
not be compiled without linker command on cc platform).


This is part of the standard C API, so why shouldn't it? Note that a
separate math library is a relict from some old platforms. A modern GCC
doesn't require any additional libs. Actually, concerning VC, I believe you
can tell the compiler/linker to not link the C runtime, but by default it
will be linked.

I tried to debug both cases (w and w/o math.h) and with math.c vc
shows exact lib where code for pow is, and w/o math.h I can't see
stack (i.e.I can't see where is pow function).


Well, you broke it and now it doesn't work. I guess that the stack is just
not set up for the debugger to digest. In particular there is a thing
called frame-pointer which might get clobbered by your abuse.

Uli

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