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

[Yves Rutschle]

> 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.

Hmm, my libc.so.2 is 1.1Mb, that for arm-linux. I realise that different
processors and OS are going to make a difference, but that still
looks suspiciously big. Is is possible that you are compiling
debugging symbols in?

> 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.

Try powerpc-linux-strip hello ?

That said, my experience with glibc is that it's worth sharing
it if there are more than 3 executables, precisely because the
start code is so huge (I can't remember what kind of size, but
200 Kb sounds "normal" (normal in terms of Glibc that is) ).

HTH,
Yves

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