How can attributes of a dependency (includes, compiler flags, etc.) be printed?

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I'm building a C++ project with Meson and have an unexpected include directory added to my compiler args that's causing some problems. I'd like to be able to print the include directories and compiler args added by my external dependencies to debug this, but I haven't been able to figure out how to do so with Meson.

I'm aware of `get_pkgconfig_variable`, but (a) not all of my external dependencies are `pkg-config` dependencies and (b) I seem to be using this method incorrectly, e.g. `some_dep.get_pkgconfig_variable('Cflags')` tells me that the `Cflags` variable isn't defined for `some_dep` (Where `some_dep.pc` *does* have a `Cflags` variable defined, and I've tried all of `CFlags`, `Cflags`, and `cflags` in case capitalization is odd).

It seems like there should be some `include_directories` or `includes` attribute accessible for a dependency object, but I haven't been able to find anything like this. Is this possible with Meson, or am I out of luck?

Thanks!

Start by investigating Meson's dependency objects and the get_pkgconfig_variable entry point, comparing pkg-config and non-pkg-config dependencies. Determine whether dependency include directories and compiler arguments can be exposed for debugging, and define a supported way to print them, with documentation or tests showing the resulting output.

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