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7 Conditional Parts of Makefiles

A conditional directive causes part of a makefile to be obeyed or ignored depending on the values of variables. Conditionals can compare the value of one variable to another, or the value of a variable to a constant string. Conditionals control what make actually “sees” in the makefile, so they cannot be used to control recipes at the time of execution.

Conditional Example    Example of a conditional
Conditional Syntax    The syntax of conditionals.
Testing Flags    Conditionals that test flags.