gcc48 won't build under El Capitan; cannot fix Availability.h

[Ryan Schmidt]

On Oct 26, 2015, at 3:58 PM, Murray Eisenberg wrote:

> Tickets 
> 
>  #48471 https://trac.macports.org/ticket/48471
> 
>  #49381 https://trac.macports.org/ticket/49381
> 
> both refer to build failures under El Capitan (in my case, OS X 10.11.1) involving gcc48.
> 
> I migrated macports from Yosemite to El Capitan per usual steps. Some 72 ports would not reinstall, most if not all due to the gcc48 problem indicated in those tickets.
> 
> The issue is not just that gcc48 cannot be used for certain other port builds, but:
> 
>   gcc48 itself fails to build.
> 
> Following suggestions at #48471, I tried to edit Availability.h. But even using sudo with an admin account, OS X refused to allow me to edit Availability.h.
> 
> As a number of the ports involved will not install, with their needed variants, using later versions of gcc, including gcc48, using a different version is not a solution. (gcc 47, gcc49, and gcc5 did reinstall OK.)
> 
> What's to be done?

For the ports that specify gcc48 as a default variant: update them, if possible to use gcc5 as a default variant.

For those that absolutely require gcc48: wait for Apple to fix /usr/include/Availability.h.