[Buildroot] [autobuild.buildroot.net] Build results for 2017-12-25

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, Matt, Mario, All,

On 2017-12-29 17:22 +0100, Thomas Petazzoni spake thusly:
> On Tue, 26 Dec 2017 19:02:30 -0600, Matthew Weber wrote:
> > Looked like a couple different failures for brltty, so I ran it
> > through utils/test-pkg.
[--SNIP--]
> >                      sourcery-mips64 [43/47]: FAILED
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld
> > -r -o  braille.o eu_braille.o eu_clio.o eu_esysiris.o
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > eu_braille.o: ABI is incompatible with that of the selected emulation
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > failed to merge target specific data of file eu_braille.o
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > eu_clio.o: ABI is incompatible with that of the selected emulation
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > failed to merge target specific data of file eu_clio.o
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > eu_esysiris.o: ABI is incompatible with that of the selected emulation
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > failed to merge target specific data of file eu_esysiris.o
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > Attempt to do relocatable link with elf64-tradlittlemips input and
> > elf32-ntradlittlemips output
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > eu_braille.o: file class ELFCLASS64 incompatible with ELFCLASS32
> > /nvme/rc-buildroot-hardening/brltty/br-mips64-n64-full/host/bin/mips64el-linux-ld:
> > final link failed: File in wrong format
> 
> This generally happens when the package build system is using "ld"
> directly at link time instead of using "gcc". It should use "gcc" to
> work on all platforms. Mario, could you have a look into this, and
> generally test with test-pkg that brltty builds on all configurations ?

I've had a go at trying to use gcc instead of ld, but no amount of love
would make it build...

In Drivers/Braille/EuroBraille/Makefile.in, it basically is doing:

    ld -r -o braille.sO braille*.o

'ld -r -o' comes from $(MKOBJ), which comes from configure.ac, where it
gets the value of ${brltty_cv_prog_mkobj}, which defaults to $(LD) -r -o

I don't know how to do that with gcc. I've tried:

    brltty_cv_prog_mkobj='$(TARGET_CC) -Wl,-r -o'

but it fails...

I've tried a few other things as well, and the build eventually
succeeded once, but I have no idea wether my change was correct or not,
so I dropped it (something to do with using -shared).

Regards,
Yann E. MORIN.

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