warning - base incorrectly sets SDK version with macOS 11.1 / Xcode 12.3

[Christopher Jones]

Hi All,

Just a warning that following the macOS 11.1 update (and corresponding Xcode 12.3) the SDK version has indeed changed from 11.0 to 11.1

Oberon ~/Projects/MacPorts/base > ls /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs
DriverKit20.2.sdk	MacOSX.sdk		MacOSX11.1.sdk
Oberon ~/Projects/MacPorts/base > ls /Library/Developer/CommandLineTools/SDKs/                  
MacOSX.sdk	MacOSX10.15.sdk	MacOSX11.1.sdk

This causes problems, as there appears to be places in base that assume the SDk would always be 11.0 for all Big Sur, macOS11 releases, e.g.


Oberon ~/Projects/MacPorts/ports > sudo port -s -v configure root6
Warning: The macOS 11.0 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install’.

I haven’t checked in detail, but at least 


https://github.com/macports/macports-base/blob/6c1396fd48a85c71cda98bc169f95561e07d1eda/src/macports1.0/macports.tcl#L1157 <https://github.com/macports/macports-base/blob/6c1396fd48a85c71cda98bc169f95561e07d1eda/src/macports1.0/macports.tcl#L1157>

https://github.com/macports/macports-base/blob/6c1396fd48a85c71cda98bc169f95561e07d1eda/src/macports1.0/macports.tcl#L1164 <https://github.com/macports/macports-base/blob/6c1396fd48a85c71cda98bc169f95561e07d1eda/src/macports1.0/macports.tcl#L1164>

are two places that need fixing.

As I guess people running macOS11 are likely to update to 11.1, we should probably look to fixing this quite quickly.

Chris
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