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About linux : Using-command-substituition-in-Makefiles

Question Detail

In the Linux sh/bash shell, I can get Linux user ID with UID_CODE=$(id -u):$(id -g). It usually gives UID_CODE=1000:1000

However, I’m writing a Makefile, similar to this:

UID_CODE=$(id -u):$(id -g) ./a.out

The Makefile gives UID_CODE=: which is just the :

I did some digging and found I need to use $$, but $$(id -u):$$(id -g) gives me UID_CODE=$(id -u):$(id -g)

How do I get the same result as in the shell?

Question Answer

No answer for now.

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