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

From: K. Noel Belcourt (kbelco_at_[hidden])
Date: 2006-09-26 11:37:30

Hi,

Not sure when the -F framework option was introduced into the  
darwin.jam, but I believe it is erroneous to pass -F to ld without an  
argument.  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.   
We'd rather not specify a path to the vecLib framework  because the  
location can change across systems.

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.

 From the darwin ld man page

        -framework name[,suffix]
               Specifies  a  framework  to link against. Frameworks  
are dynamic
               shared libraries, but they are stored  in  different   
locations,
               and therefore must be searched for differently. When  
this option
               is specified, ld searches  for  framework   
`name.framework/name'
               first  in  any directories specified with the -F  
option, then in
               the standard framework  directories  /Library/ 
Frameworks,  /Net-
               work/Library/Frameworks,  and  /System/Library/ 
Frameworks.   The
               placement of the -framework option is significant, as  
it  deter-
               mines  when  and how the framework is searched.  If  
the optional
               suffix is specified the framework is first searched  
for the name
               with the suffix and then without.

        -Fdir  Add dir to the list of directories in which to search  
for frame-
               works.   Directories  specified  with -F are searched  
before the
               standard framework directories.

Could someone check this patch and let me know if it's okay to commit.

Thanks.

-- Noel Belcourt