To conclude, the recommendation here is to: o Compile with uClibC or dietlibc o Use busybox o Gain extra 0.5 MB space
Another question is the file system itself. What is the recommendation here - JFFS, CRAMFS, anything else?...
Thanks for your answers! - Baruch.
Wolfgang Denk wrote:
In message <20030610125623.GC30175@rembrandt.csv.ica.uni-stuttgart.de> you wrote:
# ls -l lib | grep -v '^[ld]' total 2433
I conclude ELDK consists of little more than the basic networking utilities,
The ELDK (Embedded Linux Development Kit) consists of MUCH more (more than 400 MB if you install everything).
I was just talking about the ramdisk image. You are right, this contains busybox plus basic networking utilities. For this framework, the compressed image size is about 1.3 MB.
and the libc-related parts eat up most of the space. A more feature-rich system probably can't afford to waste that much.
The oriiginal poster mentioned that he has 2.5 MB available, so if he uses something like the framework I mentioned he still has 1.2 MB compressed size available. This is a _lot_.
If memroy really gets tight, there are other places where you can save space, for example the O.P. wrote:
0.5 MB is allocated for the firmware code 1.0 MB for the compressed kernel image 2.5 MB for the (compressed?) file system
The reservation for both the firmware and for the kernel image is more than generous; 256 kB + 768 kB should be sufficient, too. Which gives another 0.5 MB for application stuff.
Please understand me right: I do not want to deny that uClibc or dietlibc are fine methods to optimize the memory footprint of a system. But for a starter it is probably much easier to use standard libraries as long as there is memory available.
For the current thread the keyword was "strip".
Best regards,
Wolfgang Denk
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