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Subject: [boost] [build] using wave tool from jamfile (was: [build] referring to a tool from an external project)
From: Eric Niebler (eniebler_at_[hidden])
Date: 2014-01-19 16:40:43

Steven, thanks for your help. I have a new question below...

On 1/15/2014 8:07 AM, Steven Watanabe wrote:
> On 01/14/2014 10:03 PM, Eric Niebler wrote:
>> BOOST ?= $(boost-src) ;
>> I was under the naive assumption that since this variable wasn't
>> "local", it would be visible to all the Jamfiles in all the
>> sub-directories. But that seems not to be the case, since in my Jamfile,
>> $(BOOST) is empty. Where have I gone wrong?
> boost-build.jam is run in the global module.
> Variables are only visible in the module
> in which they are defined. (Functions in
> the global module are visible everywhere,
> variables are not). To access this variable,
> you need to use [ modules.peek : BOOST ].

Yup, thanks.

>> Would it be a good idea to add it to the super-repository's Jamroot? It
>> does something similar for the inspect tool:
>> use-project /boost/tools/inspect : tools/inspect/build ;
>> Many of the libraries have Jamfiles that use the wave tool to preprocess
>> their sources. Those are all currently broken by modularization.
> This is probably the best solution.

I went ahead and added this to the super-repo's Jamroot:

use-project /boost/libs/wave/tool : libs/wave/tool/build ;

That helps.

Now I'm working on getting the Jamfiles in Boost working that try to
call the wave tool. In libs/proto/preprocess, I have a Jamfile that uses
the wave tool to preprocess Proto's headers. It looks simply like this now:

actions wave
  $(>[2]) -o- -DBOOST_PROTO_MAX_ARITY=10 --config-file wave.cfg $(>[1])

W = /boost/libs/wave/tool//wave ;

make preprocess_proto
  : preprocess_proto.cpp $(W) : wave

That causes the wave tool and all its dependencies to get built (good),
but it fails to run. I get the following pop-up:

"The program can't start because boost_wave-vc110-mt-gd-1_55.dll is

This worked before. Clearly modularization necessitates I do something
extra to get the executable search path correct, but I don't know what
that something is. Any help?

Eric Niebler

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