Makefile Cheat Sheet/Stop exporting a variable

Prevent a variable from propagating to recipes and sub-makes.

Section: Variables and assignment

Stop exporting a variable

makefile
makefile
unexport DEBUG
Explanation

Useful when a parent environment leaks unwanted values.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Related commands

Same sheet · prioritizing Variables and assignment
Export variable to recipes
Pass a variable into the shell environment of recipe commands.
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Recursive variable
Expand later when used.
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Simple variable
Expand immediately at assignment time.
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Append to variable
Add text to an existing variable.
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Set if undefined
Assign only if variable is not already set.
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Override from command line
Pass variable values when invoking make.
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