Then there are the makefiles that expect certain commands, such as changing to a
different directory, to not affect other commands in a target's creation script. You can
solve this is either by going back to executing one shell per command (which is what the
-B flag forces PMake to do), which
slows the process down a good bit and requires you to use semicolons and escaped newlines
for shell constructs, or by changing the makefile to execute the offending command(s) in
a subshell (by placing the line inside parentheses), like so:
install :: .MAKE
(cd src; $(.PMAKE) install)
(cd lib; $(.PMAKE) install)
(cd man; $(.PMAKE) install)
This will always execute the three makes (even if the -n
flag was given) because of the combination of the :: operator
and the .MAKE attribute. Each command will change to the proper
directory to perform the install, leaving the main shell in the directory in which it
started.