[Buildroot] [Bug 10276] New: BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[Buildroot] [Bug 10276] New: BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10276

            Bug ID: 10276
           Summary: BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with
                    "gpio-hammer.o: ABI is incompatible with that of the
                    selected emulation"
           Product: buildroot
           Version: 2017.05.1
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: ciro.santilli at gmail.com
                CC: buildroot at uclibc.org
  Target Milestone: ---

Ubuntu 16.04 host:

```
git checkout bc4f5598dccc191a1e2c6268fdcef1935e2fa212
make qemu_mips64r6_malta_defconfig
echo '
BR2_PACKAGE_LINUX_TOOLS=y
BR2_PACKAGE_LINUX_TOOLS_GPIO=y
' >> .config
env -u LD_LIBRARY_PATH time make BR2_JLEVEL=14
```

error log:

  DESCEND  gpio
mkdir -p include/linux 2>&1 || true
ln -sf
/data/git/buildroot/output/build/linux-4.11.3/tools/gpio/../../include/uapi/linux/gpio.h
include/linux/gpio.h
  CC       gpio-event-mon.o
  CC       gpio-hammer.o
  CC       lsgpio.o
  CC       gpio-utils.o
  CC       gpio-utils.o
  CC       gpio-utils.o
  LD       gpio-event-mon-in.o
gpio-utils.o: file not recognized: File truncated
/data/git/buildroot/output/build/linux-4.11.3/tools/build/Makefile.build:149:
recipe for target 'gpio-event-mon-in.o' failed
make[4]: *** [gpio-event-mon-in.o] Error 1
Makefile:58: recipe for target 'gpio-event-mon-in.o' failed
make[3]: *** [gpio-event-mon-in.o] Error 2
make[3]: *** Waiting for unfinished jobs....
  LD       gpio-hammer-in.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld:
gpio-hammer.o: ABI is incompatible with that of the selected emulation
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: failed to
merge target specific data of file gpio-hammer.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld:
gpio-utils.o: ABI is incompatible with that of the selected emulation
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: failed to
merge target specific data of file gpio-utils.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: Attempt
to do relocatable link with elf64-tradbigmips input and elf32-ntradbigmips
output
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld:
gpio-hammer.o: file class ELFCLASS64 incompatible with ELFCLASS32
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: final
link failed: File in wrong format
/data/git/buildroot/output/build/linux-4.11.3/tools/build/Makefile.build:149:
recipe for target 'gpio-hammer-in.o' failed
make[4]: *** [gpio-hammer-in.o] Error 1
Makefile:49: recipe for target 'gpio-hammer-in.o' failed
make[3]: *** [gpio-hammer-in.o] Error 2
  LD       lsgpio-in.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: lsgpio.o:
ABI is incompatible with that of the selected emulation
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: failed to
merge target specific data of file lsgpio.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld:
gpio-utils.o: ABI is incompatible with that of the selected emulation
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: failed to
merge target specific data of file gpio-utils.o
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: Attempt
to do relocatable link with elf64-tradbigmips input and elf32-ntradbigmips
output
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: lsgpio.o:
file class ELFCLASS64 incompatible with ELFCLASS32
/data/git/buildroot/output/host/bin/mips64-buildroot-linux-uclibc-ld: final
link failed: File in wrong format
/data/git/buildroot/output/build/linux-4.11.3/tools/build/Makefile.build:149:
recipe for target 'lsgpio-in.o' failed
make[4]: *** [lsgpio-in.o] Error 1
Makefile:40: recipe for target 'lsgpio-in.o' failed
make[3]: *** [lsgpio-in.o] Error 2
Makefile:61: recipe for target 'gpio' failed
make[2]: *** [gpio] Error 2
package/pkg-generic.mk:227: recipe for target
'/data/git/buildroot/output/build/linux-tools/.stamp_built' failed
make[1]: *** [/data/git/buildroot/output/build/linux-tools/.stamp_built] Error
2
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2

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[Buildroot] [Bug 10276] BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10276

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> ---
Could you try to adapt https://patchwork.ozlabs.org/patch/729154/ to the gpio
linux-tools package, and see if it works for you ?

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[Buildroot] [Bug 10276] BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10276

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at buildroot.uclibc |yann.morin.1998 at free.fr
                   |.org                        |
             Status|NEW                         |ASSIGNED
                 CC|                            |yann.morin.1998 at free.fr

--- Comment #2 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Given the following:

      CC       gpio-utils.o
      LD       gpio-event-mon-in.o
    gpio-utils.o: file not recognized: File truncated
    /data/git/buildroot/output/build/linux-4.11.3/tools/build/Make
    file.build:149: recipe for target 'gpio-event-mon-in.o' failed

it looks like it might be a parallel build issue, where gpio-event-mon-in.o
needs gpio-utils.o, but it is not yet built.

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[Buildroot] [Bug 10276] BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10276

--- Comment #3 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> ---
Well, I'm pretty sure its the issue fixed for perf by
https://patchwork.ozlabs.org/patch/729154/. When ld is used directly for
linking, it needs to be explicitly told the endianness.

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[Buildroot] [Bug 10276] BR2_PACKAGE_LINUX_TOOLS_GPIO fails for MIPS with "gpio-hammer.o: ABI is incompatible with that of the selected emulation"

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10276

--- Comment #4 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Thomas, I can very easily reproduce the truncated file issue, and it
indeed always happen with parallel builds, but not always.

And I can even reproduce it in a native build, on Linus' linux master:

$ make -j1000
mkdir -p include/linux 2>&1 || true
ln -sf /home/ymorin/dev/linux/linux/tools/gpio/../../include/uapi/linux/gpio.h
include/linux/gpio.h
make -f /home/ymorin/dev/linux/linux/tools/build/Makefile.build dir=.
obj=lsgpio
make -f /home/ymorin/dev/linux/linux/tools/build/Makefile.build dir=.
obj=gpio-hammer
make -f /home/ymorin/dev/linux/linux/tools/build/Makefile.build dir=.
obj=gpio-event-mon
make[1]: Entering directory '/home/ymorin/dev/linux/linux/tools/gpio'
make[1]: Entering directory '/home/ymorin/dev/linux/linux/tools/gpio'
make[1]: Entering directory '/home/ymorin/dev/linux/linux/tools/gpio'
  CC       gpio-event-mon.o
  CC       lsgpio.o
  CC       gpio-hammer.o
  CC       gpio-utils.o
  CC       gpio-utils.o
  CC       gpio-utils.o
gpio-event-mon.c: In function ?monitor_device?:
gpio-event-mon.c:100:19: warning: format ?%lu? expects argument of type ?long
unsigned int?, but argument 3 has type ?__u64 {aka long long unsigned int}?
[-Wformat=]
   fprintf(stdout, "GPIO EVENT %" PRIu64 ": ", event.timestamp);
                   ^~~~~~~~~~~~~~
  LD       gpio-event-mon-in.o
gpio-utils.o: file not recognized: File truncated
/home/ymorin/dev/linux/linux/tools/build/Makefile.build:143: recipe for target
'gpio-event-mon-in.o' failed
make[1]: *** [gpio-event-mon-in.o] Error 1
make[1]: Leaving directory '/home/ymorin/dev/linux/linux/tools/gpio'
Makefile:58: recipe for target 'gpio-event-mon-in.o' failed
make: *** [gpio-event-mon-in.o] Error 2
make: *** Waiting for unfinished jobs....
  LD       lsgpio-in.o
make[1]: Leaving directory '/home/ymorin/dev/linux/linux/tools/gpio'
  LD       gpio-hammer-in.o
make[1]: Leaving directory '/home/ymorin/dev/linux/linux/tools/gpio'


Yet, you are right that there is also (and more importantly) a
problem with using ld instead of gcc.

So, there are two issues in one. ;-)

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