From: Daniel Lohmann <daniel.lohmann@informatik.uni-erlangen.de>
To: Roland Kindermann <iyo@gmx.de>
Cc: gcc-help@gcc.gnu.org
Subject: Re: Force gcc to include builtin functions in the executable
Date: Fri, 08 Aug 2008 06:13:00 -0000 [thread overview]
Message-ID: <D4361C90-A0B0-479C-8045-9112F5004BF3@informatik.uni-erlangen.de> (raw)
In-Reply-To: <4898C839.9080707@gmx.de>
On 05.08.2008, at 23:38, Roland Kindermann wrote:
> Hello,
>
> I have a program that uses four builtin functions: __alloca,
> ___main, _memset and _strcpy. While __alloca is compiled directly
> into the executable, the other three are used from a library. Is
> there a way to make gcc compile ___main, _memset and strcpy also
> into the executable such that it does not use any libraries anymore?
>
> I already tried -nostdlib but that results in link errors.
>
> For those who care: The reason why I want my executable independent
> from any libraries is that I perform static analysis on it and my
> analysis tool is not yet able to take additional libraries into
> account.
You may try the explicit builtin-versions (the once that are prefixed
with "__builtin_", such as "__builtin_strcpy", however, I doubt that
this helps. AFAIR, builtins of library functions are just an *option*
the compiler *might* use when this would result in more efficient
code, but there is no way to force gcc to actually use them under all
circumstances.
To prevent dependencies to some C library, I would just define own
versions of the respective functions. After all, they should not be
that difficult to implement :-)
Daniel
prev parent reply other threads:[~2008-08-07 16:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-05 21:38 Roland Kindermann
2008-08-08 6:13 ` Daniel Lohmann [this message]
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