Make/Functions

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8 Functions for Transforming Text

Functions allow you to do text processing in the makefile to compute the files to operate on or the commands to use in recipes. You use a function in a function call, where you give the name of the function and some text (the arguments) for the function to operate on. The result of the function’s processing is substituted into the makefile at the point of the call, just as a variable might be substituted.

Syntax of Functions    How to write a function call.
Text Functions    General-purpose text manipulation functions.
File Name Functions    Functions for manipulating file names.
Conditional Functions    Functions that implement conditions.
Foreach Function    Repeat some text with controlled variation.
File Function    Write text to a file.
Call Function    Expand a user-defined function.
Value Function    Return the un-expanded value of a variable.
Eval Function    Evaluate the arguments as makefile syntax.
Origin Function    Find where a variable got its value.
Flavor Function    Find out the flavor of a variable.
Make Control Functions    Functions that control how make runs.
Shell Function    Substitute the output of a shell command.
Guile Function    Use GNU Guile embedded scripting language.

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