jam version (return code: 0)
Jamfile: No such file or directory ...found 2 target(s)...
jam -h (return code: 1)
Invalid option: -h usage: jam [ options ] targets... -a Build all targets, even if they are current. -dx Display (a)actions (c)causes (d)dependencies (m)make tree (x)commands (0-9) debug levels. -fx Read x instead of Jambase. -g Build from newest sources first. -jx Run up to x shell commands concurrently. -n Don't actually execute the updating actions. -ox Write the updating actions to file x. -q Quit quickly as soon as a target fails. -sx=y Set variable x=y, overriding environment. -tx Rebuild x, even if it is up-to-date. -v Print the version of jam and exit.