[Boost-build] [mingw] response and linker input file support

Subject: [Boost-build] [mingw] response and linker input file support
From: Juergen Hunold (juergen.hunold_at_[hidden])
Date: 2009-01-21 15:44:26

Hi !

While testing mingw, I've hit cmd.exe command line lenght limitations 
again. The attached patch will use
a) a response file for static linking (using ar's @ option)
b) a linker input file for shared and executable linking.

While option a) is straight forward, using response files for b) will not 
work because the arguments provided via @response will be put on the 
commandline when they are handled down the gcc toolchain :-(
A simple linker input script containing 
INPUT( $(>) );
will be go all the way down to ld.exe and thus work.
While this a very nice feature, I hesitate to commit this because it is 
largely untested. I've tested it on Windows using mingw-4.3.2 and linux 
(using mingw-4.3.2 and native gcc-4.3.2).
Since Qt's qmake uses the same technique, (and they officially support 
only gcc-3.4.5) it might work on this releases.
So it would be nice to separate this from "standard" gcc invocation 
somehow.
Comments ?

Yours,

Jürgen
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