|[ < ]||[ > ]||[ << ]||[ Up ]||[ >> ]||[Top]||[Contents]||[Index]||[ ? ]|
This is the "show shell commands" option.
This option has some usage constraints. It:
DEBUGduring the compilation.
This will cause
set -x to be executed in the shell, with
the resultant output printed to /dev/tty. This option will have no
effect if `--disable-shell' was specified at configure time.