[CMake] Encapsulating macros

[Alexander Neundorf]

On Tuesday 20 October 2009, Theodore Papadopoulo wrote:
> Following-up a previous message "Re: [CMake] Updating cache entries on
> variable modification", I would like
> to encapsulate the FIND_LIBRARY.
>
> Taking a simple example, let's assume that I'd like to have a list of
> all the calls of FIND_LIBRARY I did.
> Is there a way of creating a cmake script that basically does something
> like:
>
> MACRO(SAVED_FIND_LIBRARY)
>     FIND_LIBRARY(${ARGN})
> ENDMACRO()
>
> MACRO(FIND_LIBRARY VAR)
>     SET(MY_LIB_LIST ${MY_LIB_LIST} ${VAR})
>     SAVED_FIND_LIBRARY(${VAR} ${ARGN})
> ENDMACRO()
>
> Obviously this does not work....
> Is there a tricky way to achieve this, or should  resign myself to use a
> new name ?

There was something...
If you override an already existing macro/command, the previous version is 
still available, but with an underscore prefixed, i.e. _find_library().
I'm not sure I remember correctly, but it was somethign close to this.

Alex