Re: [Boost-build] order of include directories in python extension

Subject: Re: [Boost-build] order of include directories in python extension
From: John Reid (j.reid_at_[hidden])
Date: 2011-02-23 10:40:19

On 22/02/11 22:19, Gevorg Voskanyan wrote:
> John Reid wrote:
>> Sorry I spoke too soon. It is not  working. Compiling is fine. At runtime
>> I get:
>>
>> ImportError:
>> /home/john/Dev/MyProjects/PyICL/bin/gcc-4.4.3/debug/_pyicl_dynamic.so:
>> undefined symbol: _Py_RefTotal
>>
>> I imagine this is something to do with  getting the boost.python usage
>> requirements wrong. Does anyone have a better  solution to this problem
>> than hard-coding all the usage  requirements?
>
>
> I have created an example which should put you on the track. Please see below,
> and don't hesitate to come back if you have questions.

Thanks a lot.

>
> lib a : a.cpp : : :<include>foo<define>bar<link>static:<define>static_macro
> <include>duplicate ;
>
> import targets : generate-from-reference ;
> import property-set ;
> import project ;
>
> rule collect_usage_reqs ( target_ref : properties * )
> {
> local result = [ generate-from-reference $(target_ref) : [ project.current ] : [
> property-set.create $(properties) ] ] ;
> local ps = $(result[1]) ;
> return [ $(ps).raw ] ;
> }
>
> lib b : :<conditional>@a_usage_reqs ;
> lib c : :<link>static<conditional>@a_usage_reqs ;
>
> rule a_usage_reqs ( properties * )
> {
> local result = [ collect_usage_reqs a : $(properties) ] ;
> ECHO $(result) ;
> return $(result) ;
> }
>
> lib no_duplicate : :<conditional>@no_dup_a_usage_reqs ;
>
> import set ;
>
> rule no_dup_a_usage_reqs ( properties * )
> {
> local reqs = [ a_usage_reqs $(properties) ] ;
> local result = [ set.difference $(reqs) :<include>duplicate ] ;
> ECHO "After filtering:" ;
> ECHO $(result) ;
> ECHO ;
> return $(result) ;
> }

I've had a look through this and I think I can more or less guess what's 
going on where. It seems like the "a" target and the 
"<include>duplicate" are hard-coded into the rules. Would it be possible 
to make these arguments? I really don't know enough about 
bjam/boost.build to say myself without a lot of trial and error.

For the time being, I've created symbolic links to my include 
directories that are in the correct alphabetic order. This is doing the 
job for me. If I have time, I will come back and try your example.

Thanks,
John.