recommended setup for building ports in development env?

[Gary Aitken]

On 04/25/18 02:54, Tijl Coosemans wrote:
> On Tue, 24 Apr 2018 19:18:50 -0600 Gary Aitken <freebsd at dreamchaser.org> wrote:
>> Asked this on questions a while ago and got no response;
>> any thoughts would be much appreciated.
>>
>> I'm trying to set up a development environment for a few ports.
>> I established a parallel ports tree and set the environment variables
>>     PREFIX=${MYFREEBSD}/usr/local
>>     WORKDIR=${MYFREEBSD}/var/db/portsnap
>>     PORTSDIR=${MYFREEBSD}/usr/ports
>>
>> With those set, I can build and install some things.
>>
>> For example, I can build and install graphics/ufraw, and with my PATH
>> properly extended to include ${MYFREEBSD}/usr/local/bin I can execute it.
>> I can also build and install x11/babl into ${MYFREEBSD}.
>> Running a normally built gimp finds the new libbabl located in a
>> different, non-standard place:
>>     $ ldd `which gimp` | grep babl
>>           libbabl-0.1.so.0 => /usr/home/.../usr/local/lib/libbabl-0.1.so.0
>> I didn't expect that to work; nice.
>>
>> However, when I go to build graphics/gegl it fails because it can't find
>> the installed babl:
>>     ===>   gegl-0.3.34 depends on shared library: libbabl-0.1.so - not found
>>
>> If I set
>>     LOCALBASE=${MYFREEBSD}/usr/local
>> it wants to rebuild all dependencies, since it doesn't find any of the
>> normally installed stuff.
>>
>> Adding
>>      -L${MYFREEBSD}/usr/local/lib      to LDFLAGS
>>     -I${MYFREEBSD}/usr/local/include  to CPPFLAGS
>> in the Makefile doesn't solve the problem.
>>
>> Is there a good solution to this, or do I have to set LOCALBASE with the
>> resulting build of everything else, not just the things that I need to
>> upgrade for this work?  Hopefully there's a way to extend the normal
>> search path for port builds?
...
> Try setting LIB_DIRS.  Its default value is "/lib /usr/lib ${LOCALBASE}/lib".

Thanks, that mostly did the trick.
However, I still have an issue with a library which resides in a subdir
of /usr/local/lib:
   ===>   gegl-0.3.34 depends on shared library: libcgraph.so - not found
$ pkg info -l graphviz
...
         /usr/local/lib/graphviz/libcgraph.so
         /usr/local/lib/graphviz/libcgraph.so.6
         /usr/local/lib/graphviz/libcgraph.so.6.0.0

I tried tweaking the Makefile:
LIB_DEPENDS+=   graphviz/libcgraph.so:graphics/graphviz
but that fails:
Error: pattern graphviz/libcgraph.so in LIB_DEPENDS is not valid

Also tried some permutations with trailing '/' and '/*' on the directory
with no success.

I could not find any discussion of this situation in the porter's
handbook, probably because it "just works" building in /usr/ports.
I can get it to work by explicitly adding the subdir as another element
of LIB_DIRS but that seems wrong; I have 92 subdirs to /usr/local/lib.

Gary