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Re: -ffreestanding option of GCC

From: Ian Lance Taylor <iant at google dot com>
To: ali hagigat <hagigatali at gmail dot com>
Cc: Andi Hellmund <mail at andihellmund dot com>, gcc-help at gcc dot gnu dot org
Date: Wed, 05 Jan 2011 08:50:05 -0800
Subject: Re: -ffreestanding option of GCC
References: <AANLkTi=TwCt03zpW8jaJ2=iVSgvy-ecS20Uc3ApyLAB+@mail.gmail.com> <4D22DFEE.5080808@andihellmund.com> <AANLkTimJicYCO-h9F0MsaCSOqGPRsGaujOQpzFCJSn5a@mail.gmail.com>

ali hagigat <hagigatali@gmail.com> writes:

> Although i specified compiling in a free standing environment but
> still libc.so, libgcc.so (-lc and -lgcc) and some other strange object
> files are being linked with my program like ccYT96w6.o, crt1.o,
> crtend.o...
> Why?
> Can i get rid of all of them some how?
> My interpretation of free standing was a program which does not depend
> on any external files, but why many files are here besides my file?

The -ffreestanding option directs the compiler to not assume that
standard functions have their usual definition, and to not assign any
special semantics to the function main.  It does not change the linking
behaviour.  You are looking for the -nostdlib option, or possibly
-nostartfiles or -nodefaultlibs.

Ian

Follow-Ups:
- Re: -ffreestanding option of GCC
  - From: ali hagigat

References:
- -ffreestanding option of GCC
  - From: ali hagigat
- Re: -ffreestanding option of GCC
  - From: Andi Hellmund
- Re: -ffreestanding option of GCC
  - From: ali hagigat

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