[Discuss-gnuradio] GR on Mac OS X 10.10 Now Working

[Michael Dickens]

The libxml2 issue was fixed in r127681 < 
https://trac.macports.org/changeset/127681 >. Please do:
{{{
sudo port selfupdate
sudo port upgrade outdated
}}}
and all of GNU Radio and UHD should now work on Mac OS X 10.10 as well as it 
does on 10.9 and prior.

The issue turned out to be that libxml2 was being linked using “flat namespace” 
— which in this case is a DYLD concept meaning to just look at the symbols 
being requested, not the library name.  By default in 10.10, linking is done 
using a “two level namespace” — meaning using both the symbol and library name. 
 Removing the flat namespace linkage — using two level namespace linkage by 
default — fixes the issue because the DYLD loader’s logic “knows” to load a 
symbol internal to a given library when available, and look external otherwise. 
 When using a flat namespace if the symbol is already loaded then it is used 
when requested, no matter what library name it came from.

All makes sense now, yes?  Well, at least it’s fixed ;) - MLD

On Oct 30, 2014, at 9:24 AM, Michael Dickens <address@hidden> wrote:

> As pointed out elsewhere [1], you can work around the libxml2 issue by 
> running GRC while forcing MacPorts’ libxml2 library to load first via:
> {{{
> DYLD_INSERT_LIBRARIES=/opt/local/lib/libxml2.dylib gnuradio-companion
> }}}
> And, otherwise, both UHD and GNU Radio seem to work on 10.10 beyond the 
> recent AVX compile issue pointed out in [2] (which also has a work-around).  
> So, if you’re an OSX user of UHD and GNU Radio who needs the latest and 
> greatest, you can get it all working if you’re willing to do some 
> work-arounds. We’re working on fixing all of these issues so that 
> work-arounds are not required. - MLD
> 
> [1] https://trac.macports.org/ticket/45583
>    
> https://lists.macosforge.org/pipermail/macports-dev/2014-October/028316.html
> [2] https://trac.macports.org/ticket/45540
>    https://lists.gnu.org/archive/html/discuss-gnuradio/2014-10/msg00447.html