osx issues (llvm 11 on x86 and llvm 11 and 12 on arm)

[mcbarton]

There appears to be an issue with clad build on osx version 13 using llvm 11 , as seen in

https://github.com/vgvassilev/clad/actions/runs/8209849513/job/22456183203

The error which occurs is

In file included from /Users/runner/work/clad/clad/demos/ErrorEstimation/CustomModel/CustomModel.cpp:3:
In file included from /Users/runner/work/clad/clad/demos/ErrorEstimation/CustomModel/CustomModel.h:11:
In file included from /Users/runner/work/clad/clad/include/clad/Differentiator/EstimationModel.h:4:
In file included from /Users/runner/work/clad/clad/include/clad/Differentiator/VisitorBase.h:14:
In file included from /Users/runner/work/clad/clad/include/clad/Differentiator/Compatibility.h:11:
In file included from /usr/local/opt/llvm@11/include/clang/AST/ASTContext.h:19:
In file included from /usr/local/opt/llvm@11/include/clang/AST/CanonicalType.h:17:
In file included from /usr/local/opt/llvm@11/include/clang/AST/Type.h:20:
In file included from /usr/local/opt/llvm@11/include/clang/AST/DependenceFlags.h:11:
In file included from /usr/local/opt/llvm@11/include/clang/Basic/BitmaskEnum.h:18:
In file included from /usr/local/opt/llvm@11/include/llvm/ADT/BitmaskEnum.h:14:
In file included from /Applications/Xcode_15.0.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/usr/include/c++/v1/utility:277:
/Applications/Xcode_15.0.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/usr/include/c++/v1/cstdlib:144:9: error: no member named 'at_quick_exit' in the global namespace
using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
      ~~^
/Applications/Xcode_15.0.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/usr/include/c++/v1/cstdlib:145:9: error: no member named 'quick_exit' in the global namespace
using ::quick_exit _LIBCPP_USING_IF_EXISTS;
      ~~^
2 errors generated.

I will attempt to fix as part of PR #807

[mcbarton]

In PR #807
osx14-arm-clang-runtime12 job disabled due to failing test

******************** TEST 'Clad Unit Tests :: Basic/./DifferentiatorHTests/failed_to_discover_tests_from_gtest' FAILED

osx14-arm-clang-runtime11 disabled due to being unable to find llvm

[vgvassilev]

In PR #807 osx14-arm-clang-runtime12 job disabled due to failing test

******************** TEST 'Clad Unit Tests :: Basic/./DifferentiatorHTests/failed_to_discover_tests_from_gtest' FAILED

osx14-arm-clang-runtime11 disabled due to being unable to find llvm

There is probably no point in keeping arm builds for llvm 11 and 12.

[mcbarton]

@vgvassilev I have commented out them out in the PR. I will remove them when I fix any issues raised in the PRs review. It should get all green ticks now I disabled the 3 failing jobs mentioned in this PR.

[vgvassilev]

This issue seems to have been fixed by the proposed PR.