From: David Abrahams (dave_at_[hidden])
Date: 2007-03-15 14:18:16
[How did this message end up on the boost developers' list? I set the
followup-to header so that it would go to boost-build, *and* I
explicitly asked for followups to go there at the top of my previous
message.]
on Wed Feb 21 2007, Vladimir Prus <ghost-AT-cs.msu.su> wrote:
> David Abrahams wrote:
>
>> * If we drop the ability to arbitrarily choose a version string, we
>> need a way to identify different configurations of a toolset that
>> may have the same version number. For example:
>>
>> - You may have both Cygwin and MinGW gcc 3.4 installed
>>
>> - You may want to experiment with a special gcc build having C++0x
>> features
>>
>> - You may need a convenient way to identify a special configuration
>> of an existing toolset.
>>
>> The solution we came up with is to add an optional argument to
>> "using" that allows you to create a special toolset subfeature
>> on-the-fly, something like:
>>
>> using gcc : 3.4 : /usr/local/conceptgcc/bin/g++ : conceptgcc ;
>>
>> This feature could then also be used to identify the toolset on the
>> command-line, something like:
>>
>> bjam toolset=conceptgcc
>
> I'm actually not sure if using "toolset=XXX" like this to alias
> to some other set of properties is good idea -- we might end up
> with lots of corner cases.
What kind of corner cases?
> I'd much rather have some "user-defined" subfeature,
Yeah, that's exactly what
using gcc : 3.4 : /usr/local/conceptgcc/bin/g++ : conceptgcc ;
is supposed to create. Or at least, a value of an implicit
user-defined subfeature, e.g. <flavor>conceptgcc
> and then use:
>
> gcc-3.4-conceptgcc,
Fine.
> or maybe
>
> gcc-3.4 flavour=conceptgcc
I don't like that one, because, for example, you might want to build
with plain gcc-3.4 as well as the conceptgcc flavor.
> or maybe
>
> gcc-3.4 <some-better-feature-name>=conceptgcc
The US English spelling of flavor is shorter.
"spin?"
"charm?"
Just kidding; I think "flavor" is fine.
-- Dave Abrahams Boost Consulting www.boost-consulting.com