CI: Switch to macOS-11 as 10.15 will be removed Aug 30th

[Geod24]

We've just been hit by a brownout.

[dlang-bot]

Thanks for your pull request, @Geod24!

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Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#14333"

[thewilsonator]

We have another brownout, what needs to be done to move this forward?

[Geod24]

We have another brownout, what needs to be done to move this forward?

Was a bit puzzled by the issue, just found out that we need to change Phobos first :upside_down_face: https://github.com/dlang/phobos/pull/8527

[thewilsonator]

Dependant PR merged

[thewilsonator]

ping

[thewilsonator]

# All hosts are 64 bits but let's be explicit
[3](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:3)
  ./dmd/compiler/src/build.d -j2 MODEL=64
[4](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:4)
  make -C dmd/druntime -f posix.mak -j2 MODEL=64
[5](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:5)
  make -C phobos   -f posix.mak -j2 MODEL=64
[6](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:6)
  # Both version can live side by side (they end up in a different directory)
[7](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:7)
  # However, since clang does not provide a multilib package, only test 32 bits with g++
[8](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:8)
  if [ clang == "g++" ]; then
[9](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:9)
    ./dmd/compiler/src/build.d install -j2 MODEL=32
[10](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:10)
    make -C dmd/druntime -f posix.mak install -j2 MODEL=32
[11](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:11)
    make -C phobos   -f posix.mak install -j2 MODEL=32
[12](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:12)
  fi
[13](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:13)
  shell: /bin/bash -e {0}
[14](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:14)
  env:
[15](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:15)
    DC: dmd
[16](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:16)
    LD_LIBRARY_PATH: /Users/runner/hostedtoolcache/dc/dmd-2.100.0/x64/dmd2/linux/lib64
[17](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:17)
    CC: /Users/runner/work/dmd/dmd/clang+llvm-11.0.0-x86_64-apple-darwin/bin/clang-wrapper
[18](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:18)
    CXX: /Users/runner/work/dmd/dmd/clang+llvm-11.0.0-x86_64-apple-darwin/bin/clang++-wrapper
[19](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:20)
Warning: Syncing file access because of OSX!
[20](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:21)
Warning: Syncing file access because of OSX!
[21](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:22)
ld: library not found for -lpthread
[22](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:23)
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
[23](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:24)
Error: linker exited with status 1
[24](https://github.com/dlang/dmd/runs/7817610235?check_suite_focus=true#step:16:25)
Error: Process completed with exit code 1.

[ibuclaw]

@Geod24 all passing now. :-)

[Geod24]

@ibuclaw : Thanks ! I rebased on master, trimmed down the commit, and went with a slightly different approach: Instead of setting SDKROOT, I just changed the key of the cache to trigger a cache miss (if you look, it was already using -1 as a suffix for this reason). Checking if this pass, but if it does, we probably don't need the wrapper scripts (we can just set SDKROOT, which I didn't knew about).

[ibuclaw]

@ibuclaw : Thanks ! I rebased on master, trimmed down the commit, and went with a slightly different approach: Instead of setting SDKROOT, I just changed the key of the cache to trigger a cache miss (if you look, it was already using -1 as a suffix for this reason). Checking if this pass, but if it does, we probably don't need the wrapper scripts (we can just set SDKROOT, which I didn't knew about).

Some primer information about SDKROOT/sysroot/syslibroot: https://lists.apple.com/archives/xcode-users/2005/Dec/msg00524.html

I read this comment before settling on SDKROOT: https://trac.macports.org/ticket/57612#comment:18

[Geod24]

Reverted back to your diff.