8904N/A # either we find one or it stays the same
8904N/A executable = find_executable(executable) or executable
8904N/A # spawn for NT requires a full path to the .exe
8904N/A # either we find one or it stays the same
8904N/A executable = find_executable(executable) or executable
8904N/A # spawnv for OS/2 EMX requires a full path to the .exe