[Buildroot] [Bug 11986] New: Document TARGET_ variables

[Buildroot] [Bug 11986] New: Document TARGET_ variables

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=11986

            Bug ID: 11986
           Summary: Document TARGET_ variables
           Product: buildroot
           Version: unspecified
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: xonqnoppp at gmail.com
                CC: buildroot at uclibc.org
  Target Milestone: ---

It is really difficult to know if, when creating a custom package, we should
use TARGET_MAKE_ENV and/or TARGET_CONFIGURE_OPTS (and maybe other hidden
variables I am not aware of...). It would help to document them. Moreover, it
is in some lines of code example, but not mention in documentation itself...

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[Buildroot] [Bug 11986] Document TARGET_ variables

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=11986

Jose Angel Torres <jose@source.parts> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jose@source.parts

--- Comment #1 from Jose Angel Torres <jose@source.parts> ---
(In reply to XonqNopp from comment #0)

Hi XonqNopp,

Did you get some clarity on this since you have posted this bug?
Has the documentation improved to meet your present day understanding?
What can we do to satisfy your original request at this point so that we may
close this issue?

I'm willing to help improve this bit.

Sincerely,
Jose

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[Buildroot] [Bug 11986] Document TARGET_ variables

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=11986

--- Comment #2 from XonqNopp <xonqnoppp@gmail.com> ---
Hi Jose,

Thanks for checking old tickets :-)

TARGET_MAKE_ENV and TARGET_CONFIGURE_OPTS are still only in examples, but not
explained in the documentation itself...

From today's https://buildroot.org/downloads/manual/manual.html

Section 18.6.1

16: define LIBFOO_BUILD_CMDS
17:     $(MAKE) $(TARGET_CONFIGURE_OPTS) -C $(@D) all
18: endef

Section 18.22.1

11: define FOO_BUILD_CMDS
12:     $(TARGET_MAKE_ENV) $(MAKE) -C $(LINUX_DIR)/tools foo
13: endef
14:
15: define FOO_INSTALL_STAGING_CMDS
16:     $(TARGET_MAKE_ENV) $(MAKE) -C $(LINUX_DIR)/tools \
17:             DESTDIR=$(STAGING_DIR) \
18:             foo_install
19: endef
20:
21: define FOO_INSTALL_TARGET_CMDS
22:     $(TARGET_MAKE_ENV) $(MAKE) -C $(LINUX_DIR)/tools \
23:             DESTDIR=$(TARGET_DIR) \
24:             foo_install
25: endef

So it is still not clear what is their purpose and how to use them.

I would assume that TARGET_MAKE_ENV contains some environment settings to run
the target's make command, but it is only an assumption. It would help if it
was explained somewhere, and also if the (or at least one) default value is
shown to better understand what those 2 variables do...

Since then I am now more experienced with buildroot and found my way to achieve
what I wanted to do, so I cannot say for sure what we should write, because I
do not remember exactly what and how I did (I should have written that directly
in this ticket, sorry). I just found a comment in a makefile I wrote for a
custom package. Where I define MYPACKAGE_BUILD_CMDS, I just wrote a comment
saying "Do not use TARGET_CONFIGURE_OPTS as it would override options we do not
want" but I don't remember why.

Cheers!

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[Buildroot] [Bug 11986] Document TARGET_ variables

[bugzilla]

https://bugs.busybox.net/show_bug.cgi?id=11986

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED
                 CC|                            |yann.morin.1998@free.fr

--- Comment #3 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Thank you for your report.

The issue tracker for the Buildroot project has been moved to
the Gitlab.com issue tracker:
    https://gitlab.com/buildroot.org/buildroot/-/issues

We are taking this opportunity to close old issues in this old
tracker. If you believe your issue is still relevant, please
open one in the new issue tracker.

Thank you!

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