Re: [Boost-build] Custom generator problem

Subject: Re: [Boost-build] Custom generator problem
From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2009-11-20 08:39:11

Ping?

Johan Nilsson wrote:
>> Hi,
>> 
>> I've been working on a custom generator for some time now, and have
>> it 
>> mostly working now, with one annoying problem. It appears that using
>> the 
>> alias rule on a target generated with my generator triggers a
>> "Duplicate 
>> name of actual target" error.
>> 
>> The generator is a custom test execution generator; in the spirit of
>> the 
>> built-in unit-test rule a specially named file is created if all
>> tests 
>> passed, which is used as a marker to determine if the test results
>> are 
>> up-to-date and ok.
>> 
>> The generator basically does this:
>> 
>> - Accepts a shared library, the "test library", as source (contains
>> unit 
>> tests)
>> - Copies the test library to the output directory
>> - Copies all run-time dependencies (shared libs, basically) of the
>> test 
>> library to the output directory before running the tests
>> - Runs the test runner, passing the name of the test library on the
>> command-line
>> - NOTE: It is not possible to simply extend PATH before running the
>> tests, 
>> as is done in testing.jam.
>> 
>> Optionally:
>> 
>> - Generates XML output from the test runner to a file in the target
>> directory
>> - Copies the generated XML output files (tagged with <variant>) to a
>> common 
>> output directory
>> 
>> All this seems to work fine, even when running a multi-variant build
>> (e.g. 
>> bjam debug release). But - if I alias the test target when
>> generating XML I 
>> get the above error, even if only running a single-variant build.
>> 
>> I've been trying to reduce the code to the simplest reproducible
>> test case, attached as a .zip archive. I'd be very grateful if
>> someone could take a 
>> look at the problem as I'm pretty much stumped at this point. (This
>> is not 
>> the real generator, as you can see by the file types.)
>> 
>> To see the problem, unzip the archive and remove the comment before
>> the 
>> alias rule in jamroot.jam. NOTE: The attached project probably only
>> works 
>> under Windows, but with minor modifications it should run under *nix
>> as 
>> well. The contained .dlls are just dummy text files.
>> 
>> Thanks / Johan
>> 
> 
> 
> 
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