Re: Can an M4-program read data out of an C-program?

[Amaury Ampe]

Thanks a lot for your respons! It helps me a great deal on the way to  
a solution.
The problem is that I have to transfer about a 120 values. Is it  
possible to do this with arrays or so? Or do I have to give each one  
an individual name and transfer them individualy?



Quoting Raphael 'kena' Poss <address@hidden>:

> Op 19 mrt 2010, om 15:24 heeft Amaury Ampe het volgende geschreven:
>
> > I'm quite new to programming in general and completely new to M4,   
> > so any help would be most welcome.
>
> In your controller program in C:
>
>   int thevalue = 1234;
>
>   const char cmd[100];
>   sprintf(cmd, "m4 -DPPCVAL=%d yourfile.m4 >thecode.c", thevalue);
>
> In your template file in M4:
>
>   .... (some code already there...) ...
>
>        asm("your assembly stuff using PPCVAL ....");
>
>   ....
>
>
> to make a long story short: use -D with m4 to define a macro on the   
> command line. Use this macro by name in your generated C code. M4   
> will replace the macro by its value even when it occurs within a C   
> string.
>
>
> --
> Raphael 'kena' Poss · address@hidden · +31 20 525 7559
> UvA · FNWI · IvI · CSA · 1098XG 107 Amsterdam (NL)
> z = \f. (\x. f (\y. x x y)) (\x. f (\y. x x y))
> There is no spoon, only fork() and vfork().



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