What is a target pattern?

What is a target pattern?

The flight path of aircraft during the attack phase. Also called attack pattern. Dictionary of Military and Associated Terms.

How do you reference a variable in makefile?

How to Use Variables

1. A variable is a name defined in a makefile to represent a string of text, called the variable’s value.
2. To substitute a variable’s value, write a dollar sign followed by the name of the variable in parentheses or braces: either `$(foo)’ or `${foo}’ is a valid reference to the variable foo .

How do you make variables?

How Variables Get Their Values

1. You can specify an overriding value when you run make .
2. You can specify a value in the makefile, either with an assignment (see section Setting Variables) or with a verbatim definition (see section Defining Variables Verbatim).
3. Variables in the environment become make variables.

How do I change a variable in makefile?

There is one way that the makefile can change a variable that you have overridden. This is to use the override directive, which is a line that looks like this: ‘ override variable = value ‘ (see The override Directive).

How are variant variables formed in GNU make?

The variant variables’ names are formed by appending ‘ D ’ or ‘ F ’, respectively. The functions dir and notdir can be used to obtain a similar effect (see Functions for File Names ).

How are automatic variables used in GNU make?

However, there is a special feature of GNU make , secondary expansion (see Secondary Expansion ), which will allow automatic variable values to be used in prerequisite lists. Here is a table of automatic variables: The file name of the target of the rule. If the target is an archive member, then ‘ $@ ’ is the name of the archive file.

Where do automatic variables go in a recipe?

It’s very important that you recognize the limited scope in which automatic variable values are available: they only have values within the recipe. In particular, you cannot use them anywhere within the target list of a rule; they have no value there and will expand to the empty string.