Re: [jamboost] Staging Problem

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-03-16 18:18:14

Just plowing through a backlog of messages here...

I don't know if this was already dealt with, but there's some precedent
for naming based on build configuration. It's used in python.jam to get
a "_d" suffix for modules compiled with the debug-python variant, which
is required for the debugging version of python to be able to load them.

-Dave

----- Original Message -----
From: "bill_kempf" <williamkempf_at_[hidden]>
To: <jamboost_at_[hidden]>
Sent: Friday, March 01, 2002 12:48 PM
Subject: [jamboost] Staging Problem

> I've e-mailed Rene about my concerns here before, but I've finally
> gotten around to proving the problem is real and thought it better to
> post it to the list this time.
>
> The issue is that the staging concept, with the ability to rename
> files, simply doesn't work for DLLs on the Win32 platform. When
> import libraries are used (and this is the only DLL usage that
> Boost.Threads can support since actual dynamic linking would result
> in premature cleanup of thread local data) the import library does
> the dynamic loading of the DLL based on the name of the DLL at
> compile time. When you rename the DLL this means that the import
> library no longer can load the appropriate DLL.
>
> Rene suggested using a utility such as IMPLIB to recreate the import
> library when staging. This might work, but I'm not sure if it's the
> right solution. I don't know if IMPLIB will work with all C++ DLLs
> generated by other compilers, nor do I know about the universal
> presence of this, or a similar utility, for the various compilers.
>
> I'd suggest instead allowing <tag>s to be used in the build commands
> to modify the output name at compile/link time. This may be a more
> complicated solution to implement in the Jam rules, but it seems to
> be the more "proper" solution.
>
> Bill Kempf
>
>
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