[Coco] DECB development under OS9

[Gregory Law]

I can't imagine it will be easy to use the OS-9 C Compiler for RS-DOS. 
You'll need to replace the cstart.r module with one that is not 
dependent on OS-9 system calls, create your library functions that are 
not dependent on OS-9 system calls, create your memory management code, 
and patch the OS-9 header on the executable module with the appropriate 
RS-DOS LOADM header. The compiler itself doesn't really generate OS-9 
specific code per se, but the cstart module and a lot of the library 
functions are heavily dependent on OS-9.

In the end I imagine it will be easier to use something like CMOC on a 
PC.

On 5/11/2018 11:14:22 PM, "Dave Philipsen" <dave at davebiz.com> wrote:

>Thanks for the comments guys.  Anyone care to comment upon whether an 
>OS9 C program with minimal system calls could theoretically be 
>patched/converted to run under DECB?  I’m thinking it might even be 
>able to be run unpatched if you simply created an add-on that serviced 
>the SWI in DECB. Of course, there would be a lot of system calls that 
>simply wouldn’t make sense under DECB but it would seem like the 
>stdin/stdout stuff could be made to work among some others.
>
>Just an idea I was thinking of...
>
>Dave