FindXKB.cmake explained please

[Raphael Kubo da Costa]

On Tuesday 29 June 2010 21:15:58 lI wrote:
> ##########  FindXKB.cmake in kkde-4.4.4
> //$KDE_PREFIX/share/apps/cmake/modules/FindXKB.cmake
> 
> 
> 
>   find_path(X11_XKB_INCLUDE_PATH X11/XKBlib.h "${X11_INC_SEARCH_PATH}")
>   if (X11_XKB_INCLUDE_PATH)
>     MACRO_PUSH_REQUIRED_VARS()
>     set(CMAKE_REQUIRED_LIBRARIES "${X11_LIBRARIES}
> ${CMAKE_REQUIRED_LIBRARIES}")
>     check_library_exists(X11 XkbLockModifiers "" HAVE_XKB)
>     MACRO_POP_REQUIRED_VARS()
>     if (HAVE_XKB)
>         set(XKB_FOUND TRUE)
>     endif (HAVE_XKB)
>   endif (X11_XKB_INCLUDE_PATH)
> 
> ################
> I looked in $KDE_PREFIX/share/apps/cmake/modules and I am unable to find
> 
> --MACRO_POP_REQUIRED_VARS
> --check_library_exists
> could someone explain where these are please?
> ==================================
> And could someone also explain what these functions do (i.e. return)?
> --MACRO_PUSH_REQUIRED_VARS()
> --MACRO_POP_REQUIRED_VARS()
See kdelibs/cmake/modules/MacroPushRequiredVars.cmake

> --check_library_exists(X11 XkbLockModifiers "" HAVE_XKB)
This one is from CMake itself, check its reference to find out how it works.