Lion - All compilers are either blacklisted or unavailable

[Ken Cunningham]

You have discovered a currently-active problem with cmake on macports, ie bootstrapping older systems is presently broken.

See <https://trac.macports.org/ticket/55382> for some workarounds for now, until this is fixed.

Best, 

Ken


On 2017-11-28, at 8:27 AM, Franco Vaccari wrote:

> Hi,
> 
> I had a working MacPorts installation on a Xserve running Lion (10.7.5, latest OS supported on that machine). I wanted to add some new package and the step "Scanning binaries for linking errors” failed. I couldn’t find a way to pass that step, and in the end I decided to rm -r /opt/local and start a new MacPorts installation from scratch.
> 
> And I can’t install most of the packages, with many of them depending on cmake, and cmake failing to install:
> 
> [is02:/] % sudo port install cmake
> Password:
> --->  Computing dependencies for cmakeWarning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
> Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
> Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
> 
> The following dependencies will be installed: 
> clang-3.9
> clang-4.0
> clang-5.0
> cmake
> Continue? [Y/n]: Y
> Error: Follow https://guide.macports.org/#project.tickets to report a bug.
> Error: Processing of port cmake failed
> [is02:/] %
> 
> When I first tried the new installation, I had Xcode 4.2 installed. I then updated Xcode to 4.6.3 (apparently the latest for 10.7) and repeated, ending with the same problem.
> 
> Is the only option to recover /opt/local from a backup, and keep it frozen? I hope something else can be done to keep MacPorts alive on that machine…
> 
> Thanks
> 
> Franco