Build

WIP shell polling #909

Job	Run time
Build with clang (fedora:34)	1m 22s
Build with clang-9 (debian:11.1)	1m 0s
Build with gcc-9 (debian:11.1)	51s
Build with clang (fedora:35)	1m 21s
Build with clang-11 (debian:11.1)	59s
Build with gcc on archlinux:base	56s
Build with gcc-10 (debian:11.1)	46s
Build with clang on archlinux:base	1m 18s
Build with gcc (fedora:34)	1m 18s
Build with gcc (fedora:35)	1m 31s
Build with gcc-12 on ubuntu-24.04	31s
Build with gcc-13 on ubuntu-24.04	25s
Build with gcc-10 (macOS-12)	10m 14s
Build with default Xcode (macOS-12)	15m 16s
Build with gcc-11 (macOS-12)	10m 15s
Build with gcc-14 on ubuntu-24.04	47s
Build on bookworm aarch64	4m 4s
Build on bookworm s390x	4m 45s
Build with clang-16 on ubuntu-24.04	1m 7s
Build on bookworm ppc64le	4m 30s
Build with clang-17 on ubuntu-24.04	33s
Build with clang-18 on ubuntu-24.04	1m 2s
	1h 4m 51s

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