7b0593fdcb
We use QEMU's virtual FAT support to avoid having to create a disk image because it is much faster, but it has a limit of about 500MB. Artifacts produced by the GCC 12 CI job exceeded this size. Add support for creating a FAT partition image and MBR-partitioned disk image and use it when the file system is too large for QEMU. In one run the Cirrus-CI LLVM test task took 1m33s using QEMU's virtual FAT while the GCC task took 6m48s using makefs+mkimg. Reviewed by: imp Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D38589
$FreeBSD$ This directory tree contains tools used for the maintenance and testing of FreeBSD. There is no toplevel Makefile structure since these tools are not meant to be built as part of the standard system, though there may be individual Makefiles in some of the subdirs. Please read the README files in the subdirs for further information.