Re: [Boost-build] possible bug when cross compiling linux->windows

Subject: Re: [Boost-build] possible bug when cross compiling linux->windows
From: Vladimir Prus (ghost_at_[hidden])
Date: 2010-09-27 14:40:31

On Monday, September 27, 2010 22:09:44 Rene Rivera wrote:
> On 9/27/2010 11:56 AM, Vladimir Prus wrote:
> > In theory, we can even add toolset property to the mix. So that, if
> > you specify
> > 
> > 	bjam target-os=windows
> > 
> > and you have msvc configured in user-config.jam, it will get used.
> > This, however, requires that all properties involved in such special
> > selection do not have a default value, since otherwise by the
> > time we reach targets.common-properties, we don't know which
> > properties are explicitly specified by the user and which are defaulted.
> > 
> > What do you think?
> 
> I somewhat already do that with the darwin toolset for picking out the
> correct one based on the architecture+target-os properties:
> 
> using darwin : 4.2~iphone
> 
> /Developer/Xcode-$(xcode)/Platforms/iPhoneOS.platform/Developer/usr/bin/g++
> -4.2 -arch armv6
> 
> 	:	<striper>
> 	:	<architecture>arm <target-os>iphone
> 
> 	;
> 
> using darwin : 4.2~iphonesim
> 
> /Developer/Xcode-$(xcode)/Platforms/iPhoneSimulator.platform/Developer/usr/
> bin/g++-4.2
> 
> 	:	<striper>
> 	:	<architecture>x86 <target-os>iphone
> 
> 	;
> 
> Trough the use of toolset requirements.. But I still have to specify the
> toolset=darwin. Is that what you are referring to?

Actually, two things.

1. It would be nice to infer toolset=darwin as well

2. The above works because you have two compilers, willing to write down
requirements in user-config.jam and willing to request them on
command line. Say, if you remove the second 'using', and leave
the first one, user might still have to say:

   bjam architecture=arm target-os=iphone

It would be nice if 'target-os=iphone' would be sufficient if there's
just one compiler for that target-os.

Does this clarify what I suggest?

- Volodya