Re: [graphviz-interest] Env var GVBINDIR

Hi Emden

Thanx for the quick response.

OK. So for non-Windows, `which dot` will give me the bin location, and 
beside that dir will be the include dir. Excellent.

Thanx.

On 06/08/13 16:26, Emden R. Gansner wrote:
> On 8/6/13 1:43 AM, Ron Savage wrote:
>> I was wondering how I could find, at run-time in my code which runs
>> 'dot' (i.e. not from within dot), the location of the Graphviz library
>> headers. So...
>>
>> On the page http://www.graphviz.org/content/command-line-invocation I
>> see a reference to GVBINDIR.
>>
>> However when I ack [1] the source, I don't see any assignment to it:
>>
>> ron@zigzag:~/Downloads/graphviz/graphviz-2.30.1$ ack GVBINDIR
>> doc/infosrc/command.html
>> 168:<DT><A NAME=d:GVBINDIR><STRONG>GVBINDIR</STRONG></A>
>>
>> doc/info/command.html
>> 168:<DT><A NAME=d:GVBINDIR><STRONG>GVBINDIR</STRONG></A>
>>
>> lib/gvc/gvconfig.c
>> 277:        libdir=getenv("GVBINDIR");
>>
>> Am I missing something?
> If by Graphviz library headers, you mean the .h files, these in theory
> could be anywhere at run-time. In
> practice, Graphviz is usually installed with a directory substructure:
>    bin
>    include
>    include/graphviz
>    lib
>    lib/graphviz
> so if you can find one of these directories, you can use relative
> pathnames to get to the others.
>
> For the purpose of plugin loading, the Graphviz core needs to know where
> the plugin libraries are
> stored. On non-Windows systems, this is the lib/graphviz directory. On
> Windows systems, these are
> stored in the bin directory.
>
> For non-Windows systems, there is a compile-time default, based on
> where 'make install' will install the software. For all systems, the
> actual value is usually determined at
> run-time. That value is returned by the function char*
> gvconfig_libdir(GVC_t*).
>
> If the user wishes to override this determination, the environment
> variable GVBINDIR can be set to
> specify the desired directory. As far as I know, this is rarely used,
> usually for testing or debugging.
>
>      Emden
>

-- 
Ron Savage
http://savage.net.au/
Ph: 0421 920 622
_______________________________________________
[email protected]
http://lists.research.att.com/mailman/listinfo/graphviz-interest