what is the usage of call in makefile?
时间: 2024-02-17 19:04:10 浏览: 19
In a Makefile, the call function is used to invoke a macro with arguments. It allows you to define a macro with parameters and then call that macro with different arguments throughout the Makefile.
The syntax for using the call function is as follows:
```
$(call macro-name,parameter1,parameter2,...)
```
Here, "macro-name" is the name of the macro you want to invoke, and "parameter1", "parameter2", etc. are the parameters that you want to pass to the macro.
For example, suppose you have defined a macro called "print" that takes a single parameter and simply prints it to the console:
```
define print
@echo $(1)
endef
```
You can then use the call function to invoke this macro with different arguments:
```
$(call print, "Hello, world!")
$(call print, "This is a test.")
```
This will output the following to the console:
```
Hello, world!
This is a test.
```