Projects for beginners

[Neil Booth]

Zack Weinberg wrote:-

> I might go farther: in defaults.h
> 
> #ifndef MACRO
> #define MACRO 0
> #endif
> 
> then in source
> 
>     if (MACRO) {
>       ... code ...
>     }
> 
> This increases the likelihood of silly mistakes in rarely-used code
> getting caught by the compiler.  It's also often more readable.

Yes.  Something I'd like to see is all the gunge that goes in files
at the moment, like

#ifndef MAX_LONG_TYPE_SIZE
#define MAX_LONG_TYPE_SIZE LONG_TYPE_SIZE
#endif

from cppexp.c being defaulted in a common header file somewhere like
this (assuming that is an OK thing to do in general).  We seem to
repeat this stuff all over the place.

>From toplev.c:

#ifndef ACCUMULATE_OUTGOING_ARGS
#define ACCUMULATE_OUTGOING_ARGS 0
#endif

#ifdef DWARF2_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
#endif

etc. etc.

Neil.