libzzip fails to build on Snow Leopard -> snowleopardfixes can help also

[Mojca Miklavec]

On 25 May 2017 at 03:58, Ken Cunningham wrote:
> The same few missing glibc functions keep popping up over and over on snowleopard (and earlier), so I built a library that replaces the most common ones.
>
> <https://github.com/kencu/snowleopardfixes>.
>
> And a portfile to install it is here:
>
> <https://github.com/kencu/SnowLeopardPorts/tree/master/sysutils/snowleopardfixes>
>
>
> The beauty of this approach is that rather than picking through the individual source files and generating patches for each required file all the time, you can just add something like this directly to the Portfile:
>
> platform darwin 10 {
>         depends_lib-append port:snowleopardfixes
>         configure.ldflags-append "-lsnowleopardfixes"
>         configure.cxxflags-append -include ${prefix}/include/snowleopardfixes.h
>         configure.cflags-append -include ${prefix}/include/snowleopardfixes.h
> }
>
> and it "just works" to replace the missing functions.
>
> In the build below, I used the block above in the libzzip Portfile, and no patches to the source at all:
>
> $ port -v installed libzzip
> The following ports are currently installed:
>   libzzip @0.13.62_1 platform='darwin 10' archs='x86_64' date='2016-08-11T10:12:43-0700'
>   libzzip @0.13.66_0 (active) platform='darwin 10' archs='x86_64' date='2017-05-24T18:32:32-0700'
>
>
> Of course platform darwin 10 could be a test for os.major <= 10 and cover all the older systems, but Leopard and Tiger have a few more things missing to be covered, so i'm thinking of separate replacement libraries for them.
>
> It would be possible for all this to be included in a Portgroup, or even by default in the Macports source.

I don't know what the cleanest approach would be, but I like the idea.
I can imagine a PortGroup, something in the spirit of:

    PortGroup legacy 1.0
    legacy.support darwin 10
    # legacy.support {darwin < 11}

which would add a dependency and append the necessary flags for darwin10.

(The library could be built statically.)

Mojca