Re: How to build applications for an embeded linux target using newlib ?

["William A. Gatliff" <bgat at billgatliff dot com>]

Mathias:


Newlib can be used as a linux runtime, starting with version 1.10.0.  

If you have a properly built and installed newlib, you should be able
to do powerpc-eabi-gcc and the library (libc.a) will get linked in
automagically.  Use the same prefix you used when you built gcc.

Libgloss is a small library of helper functions.  I think it's mostly
intended for the cross toolchain, I don't think you need it for code
running on a target if you have newlib or glibc.

Newlib is much smaller than glibc, but provides less functionality.
If you don't need anything more than a basic libc, newlib is an
excellent choice even in a linux environment.  If you need the stuff
that glibc provides (dynamic linking, locales, boatloads of other
stuff) then you'll want to run with glibc.

To build newlib for linux, specify --target=<xxx>-linux
--build=<whatever your build machine is), i.e.:

  configure --target=powerpc-linux --build=i386-pc-cygwin

I don't think you want a powerpc-eabi toolchain, I think you want a
powerpc-linux toolchain.


HTH,


b.g.


On Thu, Apr 25, 2002 at 05:52:40PM +0100, mschmid@ascona.de wrote:
> Hi
> 
> I have built a crossgcc running on cygwin for powerpc target.
> With this crossgcc i successfuly built a linux kernel for my embeded
> powerpc target.
> Now i want to build applications to run on this linux system.
> Therefore i built newlib with the following configuration:
> 
> --target=powerpc-eabi-linux-gnu --host=i686-pc-cygwin
> --build=i686-pc-cygwin
> 
> I did run make and make install successfuly.
> Now i have multiple directories with the built libraries.
> I use the libc from the "lin" directory.
> I am able to build a simple application using libc and libnosys.
> But which files do i need to link against my applications if i want to use
> system specific things like fork(), mkdir(), etc. .
> 
> Does newlib provide this special stubs for linux within a library ?
> What is libgloss for ?
> Is it at all possible to build applications for linux with newlib or is it
> better to use glibc ?
> I searched the www, but i did not find answers to all my questions.
> 
> Appreciate for any hints or information.
> 
> Thanks
> Mathias
> 
> 
> 
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-- 
Bill Gatliff
bgat@billgatliff.com

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