Work on build-tarball. #8

Job	Run time
build-tarball	43m 42s
make check on FreeBSD	2m 59s
make check on Alpine Linux	12s
make check on CentOS GNU/Linux	26s
make check on Cygwin (32)	1m 27s
make check on Cygwin (64)	1m 25s
make check on Ubuntu GNU/Linux	14m 18s
make check on macOS (macos-11)	23m 10s
make check on mingw (32)	1m 32s
make check on macOS (macos-12)	14m 12s
make check on mingw (64)	1m 27s
make check on MSVC (32)	1m 50s
make check on macOS (macos-13)	14m 35s
make check on NetBSD	2m 13s
make check on MSVC (64)	1m 40s
make check on macOS (macos-14)	6m 44s
make check on OpenBSD	2m 32s
make check with sanitizers	19m 48s
make check on Solaris 11	19m 51s
make check on Solaris 11 OmniOS	9m 37s
	3h 3m 40s

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