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

[Raphael 'kena' Poss]

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)
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