PowerPC port for company

Posted by billson555 on
URL: http://elua-development.15.s1.nabble.com/PowerPC-port-for-company-tp7578410.html

Hello,

I'm attempting a port of eLua for my company. We use micro's with the PowerPC architecture. We also have a software platform that I need eLua to work with. I have a few problems I'm hoping the community here might be able to help with.

Our platform and specific micros do not support dynamic memory allocation, or at least not heavily. We also don't have a file system. We also don't support reentrancy. As such, I've been getting a lot of build errors which seem related to these features. From what I've come across in trying to port eLua, it seems memory allocation, file systems, and reentrancy are vital to its function.

I have a few specific questions, if anybody can possibly help...

1) I've been getting a few errors about malloc() and free(). Specifically, I'm getting some multiple definition errors between malloc.o and mallocr.o, both of which are within libc.a. This isn't quite an eLua problem, but I've been trying to prevent linking to mallocr.o since this specific malloc deals with reentrancy, which we don't support. Does anybody know if it is possible to prevent linking to a specific object file from within a library file?

2) If the above question cannot be solved, I'm considering trying to remove the dynamic memory allocation code from eLua. Our platform/micros shouldn't support it anyways, and so I'm pushing the limits by trying any solution that keeps the code included. But in the case I have to de-couple any use of malloc, will this be critically detrimental to the proper functioning of eLua?

3) I've been getting persistent errors with this thing called _impure_ptr. The code in our GCC files say this thing is externally defined, but I can't find anywhere where it is actually defined. Is it possible we just aren't using enough/the right library files? I have tried to removed the places in code where it was being used, but this only caused a slew of more errors. Any advice on this?

Specifics that may be helpful: Using GCC and linker 4.7.2. Not using a build system or tool chain, just a MS batch file. Running Windows XP, but other desktops here are running Windos 7. We do not use all of newlib, but I don't know quantitatively how much of it we use.

Thanks in advance for any help.