Add includes and links from target deps automatically

[waruqi]

xmake (dev) will add includedirs, links, linkdirs and rpathdirs to target automatically if it's target deps is static/shared library.

Before:

target("library1")
    set_kind("static")
    add_files("*.c")
    add_headers("inc1/*.h")

target("library2")
    set_kind("static")
    add_deps("library1")
    add_files("*.c")
    add_headers("inc2/*.h")
    add_includes("$(buildir)/inc1")

target("test")
    set_kind("binary")
    add_deps("library2")
    add_includes("$(buildirs)/inc2")
    add_links("library2", "library1")
    add_linkdirs("$(buildir)")

Now:

target("library1")
    set_kind("static")
    add_files("*.c")
    add_headers("inc1/*.h")

target("library2")
    set_kind("static")
    add_deps("library1")
    add_files("*.c")
    add_headers("inc2/*.h")

target("test")
    set_kind("binary")
    add_deps("library2")

[ghost]

This makes me recall Cascading Style Sheets 👍

But, better to have a way to let users disable inheriting. To use or not use a feature should be decided by users

*{all:initial;}

[waruqi]

@titansnow ok, I will consider it

[waruqi]

We can also set inherit attribute to disable the default inheritance behavior in v2.1.6

add_deps("dep1", "dep2", {inherit = false})