A separate PortIndex for libc++ on older systems

[Rainer Müller]

On 2016-08-10 20:09, Lawrence Velázquez wrote:
> On Aug 10, 2016, at 4:37 AM, Ryan Schmidt <ryandesign at macports.org>
> wrote:
> 
>> We also still need to decide how to differentiate the URLs for
>> libc++ packages from the URLs of the existing libstdc++ packages.
>> One suggestion was to add cxx_stdlib as a variable in
>> archive_sites.conf, and upload the libc++ archives with the same
>> names as the libstdc++ archives but in a new subdirectory, e.g.
>> https://packages.macports.org/libc++/.
> 
> One downside of using identical archive names is that we'd be unable
> to differentiate local libstdc++ archives from libc++ ones based on
> file name. This distinction could be used to rebuild packages after
> changing cxx_stdlib, for instance.

Other variables that make archives incompatible, such as the prefix,
applications_dir, or frameworks_dir, are already not visible in the
filename.

Perhaps all of this should be part of the +CONTENTS file in the archive?

Rainer