[Sebastian, Will, Alexander] Problems compiling kdebase-4.3 due to trig

[Alexander Neundorf]

On Thursday 19 November 2009, Sebastian Trueg wrote:
> How about we just put the check for the trig parser in FindNepomuk.cmake?

You have to tell, I don't know.
Is nepomuk usable for development if the trig parser is not present ?
(it's not for some parts of KDE, but maybe for other things it's ok).

If in general it is also usable without the trig parser, we have three 
options.

1) check afterwards whether the trig parser has been found (as is done now in 
kdebase)
find_package(Nepomuk REQUIRED)
if (NOT NEPOMUK_TRIG_PARSER)
   message(FATAL_ERROR "Trig parser not found")
endif (NOT NEPOMUK_TRIG_PARSER)

2) Add support for the COMPONENTS keyword in FindNepomuk.cmake, and fail if 
REQUIRED is given and the component "trig" is specified but has not been 
found:
find_package(Nepomuk REQUIRED COMPONENTS trig)

3) Add a variable which is evaluated by FindNepomuk.cmake:
set(NEPOMUK_NEED_TRIG TRUE)
find_package(Nepomuk REQUIRED)


I think 2) is the nicest solution, I can help with it (but not before Sunday).

If Nepomuk is in general not usable for development without the trig parser, 
we can make it fail in all cases if it has not been found.

Alex