"Difference beetween uClibc and Glibc?"

[Rich Felker]

On Sat, Apr 08, 2006 at 02:49:22PM -0500, Rob Landley wrote:
> On Friday 07 April 2006 4:02 am, vipul_it413 wrote:
> > Hi all,
> > I am new to this mailing list.....
> > Can anybody know the difference between the uClibc and Glibc?
> > I want to know the technical difference and the reason why the size of the
> > executable compiled with the uClibc is smaller than that of Glibc????????
> 
> The fact that the classic "hello world" program bloats to over 400k when 
> statically linked against glibc should be a hint that glibc is simply 
> defective.

Not just that. Look what happens when it's dynamic linked:

brightrain:~$ cat > hello.c
int main() { printf("hello, world\n"); sleep(10); return 0; }
brightrain:~$ gcc hello.c
brightrain:~$ ./a.out
hello, world

and meanwhile:

brightrain:~$ cat /proc/32590/statm
84 84 71 2 0 82 13

THIRTEEN dirty pages! That's 52k of nonsharable memory that's good for
absolutely nothing.

And for completeness, static linking:

brightrain:~$ cat /proc/32650/statm
24 24 18 21 0 3 6

Note that all of these numbers are with my extremely old glibc, which
I refuse to upgrade because I know they'll all double if I do...

Rich