GNU Info

(make.info)Conditionals

---

Next: Functions Prev: Using Variables Up: Top

---

Enter node , (file) or (file)node

Conditional Parts of Makefiles
******************************

   A "conditional" 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 shell commands at the
time of execution.

Conditional Example

Example of a conditional

Conditional Syntax

The syntax of conditionals.

Testing Flags

Conditionals that test flags.