How to store dependency data?

[matheusmoreira]

The build directory is the ideal location. What is the best way to organize this data?

• Decide on the directory structure for the dependency data
• Make the build system create the directory structure

[matheusmoreira]

A dependencies directory in the build root makes sense. Its contents would mirror the structure of the source and include directories.

build
└── x86_64
    ├── dependencies
    │   ├── include
    │   │   └── liblinux
    │   │       ├── definitions.d
    │   │       ├── system_call.d
    │   │       └── ...
    │   └── source
    │       └── system_calls
    │           ├── read.d
    │           ├── write.d
    │           └── ...
    └── objects
        ├── dynamic
        │   └── system_calls
        │       ├── read.o
        │       ├── write.o
        │       └── ...
        └── static
            └── system_calls
                ├── read.o
                ├── write.o
                └── ...

[matheusmoreira]

The directories phony target creates the build tree:

phony_targets += directories
directories:
	mkdir -p $(sort $(dir $(objects) $(targets)))

This functionality must be changed in order to create the dependencies tree. The obvious way to do this is to include each generated dependency file in the targets list.