Re: [Boost-build] [v2] Darwin patch for -F option to ld

From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2006-09-26 13:07:32

K. Noel Belcourt wrote:

> Not sure when the -F framework option was introduced into the 
> darwin.jam,

It's been there since BBv1, when I created the darwin-tools.jam for it. 
And it made it's way into the BBv2 toolset.

> but I believe it is erroneous to pass -F to ld without an 
> argument. 

It is indeed an error.

> In our jamfiles, we typically use <framework>vecLib where 
> vecLib is used without a path.  Our builds now fail because the link 
> line is "-F -framework vecLib" where the -F option has no argument.  

That would be a bug. When there's no directory the "-F$(FRAMEWORK:D)" 
should expand to nothing. Not sure where the bug is though.

> We'd rather not specify a path to the vecLib framework  because the 
> location can change across systems.

Of course :-)

> I'd like to add this patch to ensure a path is always passed to -F.  
> Please let me know if there's a better way to do this.  I suppose 
> another option is to suppress the -F option if there is no path 
> preceding the framework library but I'm less certain how to do that.

Well ideally fixing the bjam bug would be best. There are two 
possibilities; Either the "$(FRAMEWORK:D)" is incorrectly returning the 
empty string ("") instead of and empty list. Or the concatenation of 
"-F$(FRAMEWORK:D)" is deciding to do the concat as if it was using 
"$(FRAMEWORK)" which has a value. I'd rate the first as the more likely bug.

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