How to put glibc-2.2.2 on a diet...

[bgat@billgatliff.com]

Peter:


There is/was a project out there somewhere called sglibc, which is
patches against glibc to shrink it down.

I have to warn you, though: I looked into sglibc a few months ago, and
the project was still seeking direction and leadership.  On top of
that, the main developer seemed to be a quite cranky individual whose
only goal is a one-disk linux disto.  Embedded isn't his thing.

That said, you may find that some of sglibc's techniques are useful.

Also, newlib-1.9.0 can do some linux libc stuff now, but the precise
list of what it offers escapes me.  Try their site at
http://sources.redhat.com/newlib .  Maybe there's enough of what you
need there.


HTH,

b.g.

On Fri, Jun 22, 2001 at 11:15:59AM -0400, Peter Barada wrote:
> 
> Now for something completely different.
> 
> I'm putting together my embedded Linux system, and I want to
> statically link my applications since I only have about 10 of them in
> total (init, expand, mount, ifconfig, route, etc...), as well as
> libc.a by itself is 10+Mb.
> 
> So when I statically link the hellow world application, here's what I get:
> 
> [/tmp] > echo 'main() { printf("hello world\n"); }' > hello.c
> [/tmp] > powerpc-linux-gcc -static -Wl,-Map,hello.map hello.c -o hello
> [/tmp] > powerpc-linux-size hello
>    text	   data	    bss	    dec	    hex	filename
>  256252	   4124	   3348	 263724	  4062c	hello
> 
> Note that the text segment is a quarter of a Meg!!!  And that's after I
> hacked out 100Kb of dcgettext() stuff.
> 
> Does anyone have an idea of how I can configure glibc to not define
> USE_WIDE_CHAR, not to call dcgettext and friends to look up strings in
> message files, etc so I have a much, much smaller library footprint.
> 
> Thanks in advance,
> 
> -- 
> Peter Barada                                   Peter.Barada@motorola.com
> Wizard                                         781-852-2768 (direct)
> WaveMark Solutions(wholly owned by Motorola)   781-270-0193 (fax)
> 
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-- 
Bill Gatliff
bgat@billgatliff.com

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