A minimal uClibc config compiles to about 80 kilobytes. Make sure to configure buildroot to use -Os (plus other size-saving options). Turn off everything that you do not need, both in busybox and uClibc -- typical start .config should be make allnoconfig for both. HTH, Bernhard
On Sep 25, 2009 8:35 PM, "Ersin Akinci" <[email protected]> wrote: Hi all, I'm developing a custom floppy-based distro for my ancient P5 laptop, and so naturally I've delved into the world of uClibc, buildroot, and busybox. As I've been compiling, I've noticed something that seems strange to me. When I compile busybox and link it statically using the buildroot toolchain (using uClibc), the executable never tops 400K w/ my config, which is fairly minimal (all base tools + some archival + ash + some network tools, nothing else). I also think I remember reading somewhere in the menuconfig descriptions that busybox only comes in around 4 MB even with all the options selected. Yet whenever I compile uClibc seperately (also using the buildroot toolchain w/ uClibc) it always comes to somewhere between 3.5-4.5 MB with a rather slim config. Is it just me or does that seem a bit much when compared with the busybox executable? I know that busybox isn't statically linking every function provided by uClibc, but it still seems off. The uClibc menuconfig, for example, has a section called "Big and Tall", but even there the options seem miniscule in comparison with the total compiled size of the library (e.g., 53 kb regexp support vs. the final library's size, ~3.5 MB). Could someone enlighten me? I'm sure I'm missing something. Also, if this behavior is normal, can someone suggest a bare minimum required config for uClibc to have my fairly minimal busybox run properly? Is it possible to get a minimal uClibc so small that the size of the library + the size of the dynamically linked busybox = the size of a statically linked busybox, or does uClibc's config mechanism not provide enough fine-grained control for this? Thanks, Ersin _______________________________________________ uClibc mailing list [email protected] http://lists.busybox.net/mailman/listinfo/uclibc _______________________________________________ uClibc mailing list [email protected] http://lists.busybox.net/mailman/listinfo/uclibc
