Re: PB555 and C++

--- In [email protected], "Liechty Ronald-RAT109" <mwron@m...> 
wrote:
Hi Ron,
Thank you so much for taking the time to answer my question. Please 
correct me if I am wrong but I believe only the MPC556 supports code 
compression. Also, there are two files (MSL_C++.PPCEABI.BARE.H.a and 
MSL_C.PPCEABI.BARE.H.a) for MSL library. Is it okay for me to take 
out MSL_C.PPCEABI.BARE.H.a file since it is only the C library? I 
guess what I am trying to ask is if both MSL library files are needed?

Thanks!
Lei


> Hello Lei,
> 
> One of our engineers said there are 3 possibilities. 
> 
> 
> 1) There are some variants of the 5xx chips that support code
> compression which if you enable it (please see the documentation) 
there
> is a post link phase using a tool called Squeezard which will 
compress
> the code and the chip has the ability to read the compressed code. 
If
> you don't have one of those chips or if your copy of CW doesn't 
support
> it, then it won't work for you. 
> 
> 
> 2) Starting about a year or 2 ago, CW EPPC started shipping size 
reduced
> versions of the C libs. These libs have SZ in the name and we only 
ship
> them prebuilt for certain processors such as e500 for which the lib 
is
> called MSL_C.PPCEABI.bare.SZ.E.a. You can rebuild the H MSL C lib 
with
> the prefix file ansi_prefix.PPCEABI.bare.SZ.h. You also need to use
> ansi_prefix.PPCEABI.bare.SZ.h to build your project. Again if your 
copy
> of CW doesn't have ansi_prefix.PPCEABI.bare.SZ.h, then it won't 
work for
> you. 
> 
> 
> 3) Change the floating point support to none assuming you do not 
need it
> and use N libs. If you are using cout or printf, those functions can
> cause some bloat and you can hack at their implementation to only
> support the format characters you need. 
> 
> Ron
> 
> --  
> Ron Liechty  
> Ombudsman Freescale Developer Technology
> ron.liechty@f... 
> 
> coles555 Wrote:
>  
> Hi there, 
> I am working with a PB555 board using Codewarrior for development 
> purposes. Now all the code that I am using are written in C++ and 
the 
> Metrowerks Standard C++ Library (MSL_C++.PPCEABI.BARE.H.a and 
> MSL_C.PPCEABI.BARE.H.a) takes up 38 Kbytes of data space. However, 
the 
> PB555 board has only a mere 26 Kbytes of SRAM. My question is 
whether 
> or not it is possible to implement C++ code in the PB555 board? If 
so, 
> how can those C++ Library data fit within SRAM?
>






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