[Cmake] Removing a cache entry? Multiple MACRO definitions?

[Andy Cedilnik]

Hi Amitha,

So, #1:

I had a similar idea. Something like a global variable which reruns all
the try compiles, so then you do:

cmake -DCMAKE_RERUN_TRY_COMPILES=1 .

which will ignore values in the cache.

Also, I think it may work if you set HAVE_STDLIB to be HAVE_STDLIB, but
I am not sure.

About #2, that should work fine. You can redefine macros.

			Andy

On Fri, 2004-01-02 at 15:08, Amitha Perera wrote:
> Hi all
> 
> 1)
> 
> How can I remove a cache entry in CMake? I want to force a re-test of
> a CHECK_INCLUDE_FILE without generating a new variable name. Something
> like this:
> 
> CHECK_INCLUDE_FILE( stdlib.h HAVE_STDLIB )
> # removes definition from memory, but not cache file
> SET( HAVE_STDLIB )
> # Will not re-run check because entry exists (in cache file)
> # How can I force it?
> CHECK_INCLUDE_FILE( stdlib.h HAVE_STDLIB )
> 
> 
> 2)
> 
> Is it permissible to define the same macro twice? I.e. is
> 
> INCLUDE( ${CMAKE_ROOT}/Modules/CheckIncludeFile.cmake )
> INCLUDE( ${CMAKE_ROOT}/Modules/CheckIncludeFile.cmake )
> 
> valid?