llvmPackages_15: init at 15.0.2

[lovesegfault]

Description of changes

This was pretty smooth, but the second commit I think deserves some attention. I
needed to do that since setting it to libcxxabi as we were doing before was
causing CMake to fail during the configure step.

I think what I did is fine, since all the headersOnly build does is copy files
around, but I'd like that checked by someone who understands our LLVM builds
better than me.

I'll bump llvmPackages_latest in another PR to avoid mass rebuilds.

• llvmPackages_15: init at 15.0.2
• llvmPackages_15.libcxx: use LIBCXX_CXX_ABI=none when building headers only

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[zowoq]

#194634

[misuzu]

Suggested change

	rm test/tools/llvm-dwarfdump/X86/simplified-template-names.s
	rm test/tools/llvm-dwarfdump/X86/simplified-template-names.s
	rm test/CodeGen/RISCV/rv32zbp.ll
	rm test/CodeGen/RISCV/rv64zbp.ll

These fail on armv7l-linux:

llvm> ********************
llvm> ********************
llvm> Failed Tests (2):
llvm>   LLVM :: CodeGen/RISCV/rv32zbp.ll
llvm>   LLVM :: CodeGen/RISCV/rv64zbp.ll
llvm> Testing Time: 158.23s
llvm>   Skipped          :    20
llvm>   Unsupported      :  1596
llvm>   Passed           : 47426
llvm>   Expectedly Failed:   161
llvm>   Failed           :     2
llvm> 1 warning(s) in tests
llvm> make[3]: *** [CMakeFiles/check-all.dir/build.make:71: CMakeFiles/check-all] Error 1
llvm> make[3]: Leaving directory '/build/llvm-src-15.0.2/llvm/build'
llvm> make[2]: *** [CMakeFiles/Makefile2:9246: CMakeFiles/check-all.dir/all] Error 2
llvm> make[2]: Leaving directory '/build/llvm-src-15.0.2/llvm/build'
llvm> make[1]: *** [CMakeFiles/Makefile2:9253: CMakeFiles/check-all.dir/rule] Error 2
llvm> make[1]: Leaving directory '/build/llvm-src-15.0.2/llvm/build'
llvm> make: *** [Makefile:228: check-all] Error 2

[misuzu]

This patch is not applying and not needed:

compiler-rt-libc> source root is compiler-rt-src-15.0.2/compiler-rt
compiler-rt-libc> patching sources
compiler-rt-libc> applying patch /nix/store/qvyl9jgm1a1mlix44qbsgrd1ipwciamk-X86-support-extension.patch
compiler-rt-libc> patching file lib/builtins/CMakeLists.txt
compiler-rt-libc> Hunk #1 succeeded at 355 (offset 7 lines).
compiler-rt-libc> Hunk #2 succeeded at 735 with fuzz 2 (offset 8 lines).
compiler-rt-libc> applying patch /nix/store/8z4wq03gvjdyvpldnrl7x1sy14qfk1pk-gnu-install-dirs.patch
compiler-rt-libc> patching file cmake/base-config-ix.cmake
compiler-rt-libc> applying patch /nix/store/x0137mdpq76zfp2xvn3ncawys2g4c93i-normalize-var.patch
compiler-rt-libc> patching file cmake/Modules/CompilerRTUtils.cmake
compiler-rt-libc> Hunk #1 succeeded at 392 with fuzz 2 (offset 90 lines).
compiler-rt-libc> applying patch /nix/store/jd7mnr62kxgks1rwnrrfg22vwnggkpxf-armv7l.patch
compiler-rt-libc> patching file cmake/builtin-config-ix.cmake
compiler-rt-libc> Hunk #1 FAILED at 24.
compiler-rt-libc> 1 out of 1 hunk FAILED -- saving rejects to file cmake/builtin-config-ix.cmake.rej
compiler-rt-libc> patching file lib/builtins/CMakeLists.txt
compiler-rt-libc> Hunk #1 succeeded at 569 with fuzz 2 (offset 95 lines).
compiler-rt-libc> Hunk #2 FAILED at 596.
compiler-rt-libc> 1 out of 2 hunks FAILED -- saving rejects to file lib/builtins/CMakeLists.txt.rej