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Linux makefile assignment operators

By On 26 November 2015 · Leave a Comment

This info copied from: https://vuanhduy.wordpress.com/2014/05/02/the-variants-of-gnu-makefile-assignment-operation/

The differences in =, :=, ?= and += when assigning a macro in Makefile.

= operation

If the variable does not have a value, the operation assign the value to it
If the variable already had a value, it is replaced.
This value will be expanded when […]

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Makefile variables ($@, $< ...)

By On 14 February 2013 · 3 Comments

Ever wondered what the funny-looking vars in the GNU Makefiles are? These two are the most common ones:  $@ and @< there are some other are special vars as well.

Here’s what these two mean, and you can look up the rest on the GNU Makefile “Automatic Variables” help page:

$@     -is the name of the […]

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