[CMake] String option recognized as boolean

[Nils Gladitz]

On 05/30/2014 08:27 AM, Андрей Парамонов wrote:

> Is it a problem in cmake or in HDF5 sources? If the latter, how could it
> be fixed?
> I'm a first-time cmake user, so please forgive my ignorance ;-)
>
> Best wishes,
> Andrey Paramonov

I haven't tried configuring the project but looking at the sources ...

CMakeFilters.cmake (included by CMakeLists.txt) defines it as a boolean 
option:

   option (HDF5_ALLOW_EXTERNAL_SUPPORT "Allow External Library Building 
(NO SVN TGZ)" "NO")

option() is always boolean. To create cache variables with a different 
type use set(); this seems to be done by your project's 
config/cmake/cacheinit.cmake (which I assume isn't directly included):

   set (HDF5_ALLOW_EXTERNAL_SUPPORT "NO" CACHE STRING "Allow External 
Library Building (NO SVN TGZ)" FORCE)
   SET_PROPERTY(CACHE HDF5_ALLOW_EXTERNAL_SUPPORT PROPERTY STRINGS NO 
SVN TGZ)

If you were to replace the existing option() with that snippet remove 
the "FORCE" keyword first.

Nils