The Phony marker in a make script

[pwgit-create]

The .PHONY marker in a Makefile is used to explicitly declare that certain targets are not actual files, but
rather "phony" or fake targets. These targets represent actions or commands to be executed rather than file names.

When you declare a target with .PHONY, it tells make that the target should always be considered out-of-date
and therefore should always run its associated commands when invoked. This is important for targets like clean,
build, or help which are not tied to any specific files but represent actions.

Here's an example explanation with one of the .PHONY declarations from one of our Make files :

.PHONY: build
build:
	cd $(POM_DIR) && mvn clean install

In this case, build is marked as a phony target. This means that no matter what files exist in the project, when
you run make build, it will always execute the command to build the project using Maven.

If build were not declared as .PHONY, make might think there's an actual file named build and would only
run the commands if the file didn't exist or was outdated compared to its dependencies. This isn't what you want
for targets that represent actions, like cleaning or building a project.

Using .PHONY helps avoid potential confus