Use makefile variables inside tcsh

Question

I created a tcsh script, which I want to call through a Makefile environment. Therefore I want to reference variables inside this tcsh script, which I have defined in the Makefile environment. I tried to reference environment variables as $?VARIABLE, but this does not work on variables from the Makefile environment. How can I do this?

Answer 1

If you're using GNU make, you need to export the variables.

Answer 2

Any dollar sign needs to be represented as a $$ in a make rule if it is to be used in commands. Note that it is extremely unwise to program in tcsh. In addition, make uses /bin/sh to execute commands, so you cannot use tcsh syntax in make rules.

All you could do, if you must, is something along

 MAKEVAR = foo
 target:
       tcsh -c 'echo $$HOME $(MAKEVAR)'

What everybody else does is

 MAKEVAR    = foo
 ANOTHERVAR = bar
 target:
       MAKEVAR=$(MAKEVAR) ANOTHERVAR=$(ANOTHERVAR) script.sh

This works for all make versions, not just GNU make.