config.h.cmake issue ?

[Alexander Neundorf]

On Wednesday 03 May 2006 16:09, David Faure wrote:
> On Wednesday 03 May 2006 15:32, Ralf Habacker wrote:
> > 	#cmakedefine HAVE_PCREPOSIX 1
> >
> > The problem is that if someone forgets to add this constants the
> > resulting errors are hards to detect.
>
> We could fix this by using #if HAVE_FOO and #if !HAVE_FOO instead of ifdef,
> then we would have compiler warnings when HAVE_FOO isn't defined (due to
> forgetting to add it to config-foo.h, or due to forgetting to include
> config-foo.h in the cpp file).
>
> But for this we need a #cmakedefine equivalent that sets 0 or 1, instead of
> "undef or 1". Could this be done?

in the CMakeLists.txt:

macro_bool_to_01(SOMETHING_FOUND HAVE_SOMETHING) 
(feel free to suggest a better name for this one, it works also for multiple 
"output" variables))

in the .h.cmake:

#define HAVE_SOMETHING ${HAVE_SOMETHING} )

Bye
Alex
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