[Buildroot] [Bug 14656] New: Adding dependencies from an external tree does not work

From: bugzilla@busybox.net
To: buildroot@uclibc.org
Subject: [Buildroot] [Bug 14656] New: Adding dependencies from an external tree does not work
Date: Wed, 09 Mar 2022 10:22:59 +0000	[thread overview]
Message-ID: <bug-14656-163@https.bugs.busybox.net/> (raw)

https://bugs.busybox.net/show_bug.cgi?id=14656

            Bug ID: 14656
           Summary: Adding dependencies from an external tree does not
                    work
           Product: buildroot
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned@buildroot.uclibc.org
          Reporter: dopsi@dopsi.ch
                CC: buildroot@uclibc.org
  Target Milestone: ---

When a dependency is added by a Makefile in an external tree to a package
present in the Buildroot tree, the dependency does not get built before the
package.

Detailled description:

When having the following in an external tree:

    FOO_DEPENDENCIES += bar

FOO_FINAL_ALL_DEPENDENCIES gets updated and will contain bar (as shown by
running make foo-show-depends) but this will not be reflected in the build
order (as shown in make foo-show-build-order).

In the package/pkg-generic.mk file [1] there is a call to patsubst that will
compute the prerequisites for foo-show-build-order.

When printing the output of pathsubst with

    echo $$(patsubst %,%-show-build-order,$$($(2)_FINAL_ALL_DEPENDENCIES))

the value is properly written out and will contain bar. However, the
prerequisite is not present when printing them out with

    echo $$^

[1] https://git.buildroot.org/buildroot/tree/package/pkg-generic.mk#n996

Links:
- first mailing list post:
https://lists.buildroot.org/pipermail/buildroot/2022-February/637237.html
- second mailing list post:
https://lists.buildroot.org/pipermail/buildroot/2022-March/638117.html
- minimal example: https://gitlab.com/dopsi/mve-br2-external-dep

-- 
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot