Clang15 package has wrong version of clang
15.0.3 (and also 15.0.2 before) comes with clang 15.0.1. This breaks building as clang can't find the correct include path.
❯ tar xf clang15-15.0.3-r0.24cd7b20.apk
❯ ./usr/bin/clang-15 --version
Alpine clang version 15.0.1
Target: x86_64-alpine-linux-musl
Thread model: posix
InstalledDir: /home/kris/Temp/Clang/./usr/bin
❯ ./usr/bin/clang-pseudo --version
LLVM (http://llvm.org/):
LLVM version 15.0.3
Optimized build.
Default target: x86_64-alpine-linux-musl
Host CPU: znver3