Re: [Discuss-gnuradio] GnuradioConfig.cmake on master

[Sean Nowlan]

On 05/09/2013 09:48 AM, Tom Rondeau wrote:
> Good catch, Sean, and thanks for the patch as well! Seems I can't make 
> any changes without messing up between the master/next changes these 
> days... I'm making sure all of the components are searching for the 
> right headers in master and next. 

Actually, I'm having trouble with the CORE component. Perhaps it's 
conflicting with the FindGnuradioCore.cmake module.

This works:
find_package(GnuradioCore)
set(GR_REQUIRED_COMPONENTS ANALOG DIGITAL BLOCKS FFT FILTER)
find_package(Gnuradio)

This doesn't:
set(GR_REQUIRED_COMPONENTS CORE DIGITAL BLOCKS FFT FILTER)
find_package(Gnuradio)

"cmake ../" succeeds and finds both libgnuradio-core.so and includes in 
/usr/local/include/gnuradio. However, when I run "make," I get:
fatal error: gr_io_signature.h: No such file or directory

Somehow the include statements aren't getting set correctly. I suppose I 
need to keep find_package(GnuradioCore). If so, what's the purpose of 
setting CORE (or RUNTIME) in GR_REQUIRED_COMPONENTS?

> See the bottom of the main page in the Doxygen manual (you'll have to 
> build it yourself). It explains it a bit more. Since 
> GnuradioConfig.cmake is installed by GNU Radio, there's no need to put 
> it into modtool; you just have to use it in modtool if you want it's 
> functionality. Right now, by default, projects built with modtool only 
> look for libgnuradio-runtime, just to make sure it's there. If you 
> need the more complicated functionality the GnuradioConfig provides, 
> you can easily add that line to the CmakeLists file yourself to search 
> for the necessary components as well as the API compatible version you 
> need for your OOT project. So it doesn't really need to be part of 
> modtool. Thanks! Tom 

Ok. Although, I don't think placing a couple of commented-out lines in 
CMakeLists.txt would hurt, with a comment like, "to use GR components, 
uncomment the following and set GR_REQUIRED_COMPONENTS to libraries you 
want to link."

Finally, it looks like it's not necessary to set "include_directories" 
to ${GNURADIO_ALL_INCLUDE_DIRS} and "link_directories" to 
${GNURADIO_ALL_LIBRARIES}. Cmake is a colossal mystery to me...