[Buildroot] [Bug 5624] New: When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[Buildroot] [Bug 5624] New: When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

           Summary: When building directfb, BR2_TARGET_LDFLAGS not used by
                    libtool
           Product: buildroot
           Version: 2012.08
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: dunk_palmer at yahoo.com
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Created attachment 4592
  --> https://bugs.busybox.net/attachment.cgi?id=4592
Snippet of build output, showing incorrect linker invocation.

I'm using the CodeSourcery mips-4.4 toolchain, and have a little endian target,
so I set BR2_TARGET_LDFLAGS="-EL" in my .config. Works fine for most things,
however directfb fails to build; at one stage, it invokes the linker, without
the -EL argument, and the link fails because the linker (which defaults to BE)
is attempting to link LE object files.

Dodgy workaround is to replace output/host/usr/bin/mips-linux-gnu-ld with a
script that contains:

#!/bin/sh
exec /opt/CodeSourcery/mips-4.4//bin/mips-linux-gnu-ld -EL $*


Relevant build output attached. The interesting parts of my .config are:

#
# Toolchain
#
# BR2_TOOLCHAIN_BUILDROOT is not set
BR2_TOOLCHAIN_EXTERNAL=y
# BR2_TOOLCHAIN_CTNG is not set
# BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201109 is not set
# BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201103 is not set
BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS44=y
# BR2_TOOLCHAIN_EXTERNAL_CUSTOM is not set
# BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD is not set
BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED=y
BR2_TOOLCHAIN_EXTERNAL_PATH="/opt/CodeSourcery/mips-4.4/"
BR2_TOOLCHAIN_EXTERNAL_PREFIX="mips-linux-gnu"
BR2_TOOLCHAIN_EXTERNAL_GLIBC=y

BR2_TARGET_OPTIMIZATION="-pipe -EL"
BR2_TARGET_LDFLAGS="-EL"

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2012-10-24 12:32:25 UTC ---
The first problem is that DirectFB is stupid in its usage of ld. It should
always use gcc, even for pure linking steps, as gcc will pass the appropriate
arguments to ld.

The second problem is that we don't generate a toolchain wrapper for ld, so yes
the BR2_TARGET_LDFLAGS are not passed.

I am not sure if we should fix DirectFB, or add the toolchain wrapper for ld.

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #2 from Arnout Vandecappelle <arnout@mind.be> 2012-10-24 21:04:41 UTC ---
Would it help to pass LD="$(TARGET_LD) $(TARGET_LDFLAGS)" to configure?

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #3 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2012-10-24 22:00:00 UTC ---
You mean globally (in package/Makefile.in) or specifically for this package?

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #4 from Duncan <dunk_palmer@yahoo.com> 2012-10-25 09:09:17 UTC ---
Created attachment 4598
  --> https://bugs.busybox.net/attachment.cgi?id=4598
Change as suggested by Arnout.

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #5 from Duncan <dunk_palmer@yahoo.com> 2012-10-25 09:09:47 UTC ---
Arnout, I've made the change you suggested to package/directfb/directfb.mk; now
directfb, and all the other packages I have selected, are building for me.
Patch against 2012.08 attached.

I'm not sure how many packages have the same problem as directfb; if there are
a few, then I'd imagine that a more robust solution may be to create a
toolchain wrapper for ld.

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

--- Comment #6 from Jean-Mickael <jean-mickael.guerin@6wind.com> 2012-10-26 06:56:14 UTC ---
FYI I got similar issue with my LD not having the correct emulation (mips),
and I opted to add it to LDFLAGS, "-melf64btsmip" for instance.
It fixes packages using LD directly, but a new problem appears: CC cannot
recognize such LD specific option syntax, and some packages adds TARGET_LDFLAGS
to CC.

So I would first clean-up TARGET_LDFLAGS usage before doing the LD wrapper
(which sounds good idea).

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[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[Arnout Vandecappelle]

On 25/10/12 11:09, bugzilla at busybox.net wrote:
> https://bugs.busybox.net/show_bug.cgi?id=5624
>
> --- Comment #4 from Duncan<dunk_palmer@yahoo.com>  2012-10-25 09:09:17 UTC ---
> Created attachment 4598
>    -->  https://bugs.busybox.net/attachment.cgi?id=4598
> Change as suggested by Arnout.

  Patch looks good. Should we ask to repost it on the list?

  Regards,
  Arnout
-- 
Arnout Vandecappelle                               arnout at mind be
Senior Embedded Software Architect                 +32-16-286540
Essensium/Mind                                     http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium                BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F

[Buildroot] [Bug 5624] When building directfb, BR2_TARGET_LDFLAGS not used by libtool

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5624

Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #7 from Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com> 2014-02-12 08:52:56 UTC ---
This problem has been fixed with commit
7e9264956bb5693bc49274ee0b42ffb4c869e23f in buildroot 2013.11.

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