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the temporary image in $TMPDIR. Allow the script to be run from the src/tools/boot directory by using make -V SRCTOP to find the top of the tree, because this script is handy for quick smoke-testing of loader changes, as well as being useful in CI testing. Also, use a temp directory in $TMPDIR to assemble the boot image, and write the boot log file to $TMPDIR. Arrange to have the temporary image clean itself up, but leave the log file in $TMPDIR for post-mortem analysis of failures when the script is run interactively. Differential Revision: https://reviews.freebsd.org/D19876
$FreeBSD$ 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.