Re: [OT] automatically write enabled macros of the makefile into a file

[T <mlist4suntong@yahoo.com>]

On Wed, 30 Aug 2006 18:14:33 -0400, Kamaraju Kusumanchi wrote:

> The code comes with a makefile. The code contains many
> 
> #ifdef
> #endif
> 
> constructs which are preprocessed by cpp (The C preprocessor). ...
> 
> #ifdef construct1
>   write(10,*) 'construct1 is enabled'
> #else
>   write(10,*) 'construct1 is disabled'
> #endif
> 
> But this is very time consuming to do for all of the macros. Now it would
> be much easier, if, before preprocessing the code, there is a way to
> automatically write a file which tells which macros were enabled and which
> macros were disabled.

Instead of writing them at each individual places, why don't you write
just one output line at a central place. Say right at the beging of
program excution, you put:

 write(10,*) 'Compiled with construct1=${construct1} construct1=${construct2}...'

The ${construct1} & ${construct2} should be populated by make, before cpp
see them...

HTH

tong