[Buildroot] [Bug 10451] New: libpcap 1.8.x and 1.7x does not compile on PPC

[Buildroot] [Bug 10451] New: libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

            Bug ID: 10451
           Summary: libpcap 1.8.x and 1.7x does not compile on PPC
           Product: buildroot
           Version: 2017.08
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned at buildroot.uclibc.org
          Reporter: mail at kkrach.de
                CC: buildroot at uclibc.org
  Target Milestone: ---

Created attachment 7321
  --> https://bugs.busybox.net/attachment.cgi?id=7321&action=edit
Compile output

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

--- Comment #1 from Karl Krach <mail@kkrach.de> ---

Libpcap in version 1.8.1 and 1.7.4 doesn't compile with PPC gcc 7.2.0. When
downgrading to 1.6.2 the compilation succeeds.

Buildroot is version 2017.08.



Full GCC Version:

./output/host/bin/powerpc-buildroot-linux-uclibcspe-gcc --version
powerpc-buildroot-linux-uclibcspe-gcc.br_real (Buildroot 2017.08-dirty) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

Karl Krach <mail@kkrach.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
               Host|                            |Debian GNU/Linux 9
                   |                            |(stretch)
             Target|                            |powerpc-buildroot-linux-ucl
                   |                            |ibcspe-

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

Karl Krach <mail@kkrach.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mail at kkrach.de
              Build|                            |Linux 4.9.0-4-amd64 #1 SMP
                   |                            |Debian 4.9.51-1
                   |                            |(2017-09-28) x86_64
                   |                            |GNU/Linux
               Host|Debian GNU/Linux 9          |
                   |(stretch)                   |

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

--- Comment #2 from Karl Krach <mail@kkrach.de> ---
The compiler error is:


output/host/bin/powerpc-buildroot-linux-uclibcspe-gcc -fvisibility=hidden -fpic
-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -mabi=spe
-mfloat-gprs=double -Wa,-me500x2 -O3  -I. 
-I/home/kkr/Projects/aseries-axos-c2m/system/buildroot-2017.08/output/host/powerpc-buildroot-linux-uclibcspe/sysroot/usr/include/dbus-1.0
-I/home/kkr/Projects/aseries-axos-c2m/system/buildroot-2017.08/output/host/powerpc-buildroot-linux-uclibcspe/sysroot/usr/lib/dbus-1.0/include
  -DBUILDING_PCAP -DHAVE_CONFIG_H  -D_U_="__attribute__((unused))"
-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -mabi=spe
-mfloat-gprs=double -Wa,-me500x2 -O3 -c ./pcap.c

./pcap.c: In function 'pcap_create_common':
./pcap.c:590:1: error: unrecognizable insn:
 }
 ^
(insn 58 57 59 9 (set (subreg:SI (reg:V2SI 181) 0)
        (unspec:SI [
                (symbol_ref:SI ("pcap_cant_set_rfmon") [flags 0x3]
<function_decl 0x7eff366c4c00 pcap_cant_set_rfmon>)
                (reg:SI 30 30)
            ] UNSPEC_MOVSI_GOT)) "./pcap.c":570 -1
     (nil))
./pcap.c:590:1: internal compiler error: in extract_insn, at recog.c:2311

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

--- Comment #3 from Karl Krach <mail@kkrach.de> ---
Created attachment 7326
  --> https://bugs.busybox.net/attachment.cgi?id=7326&action=edit
Defconfig to reproduce

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

--- Comment #4 from Karl Krach <mail@kkrach.de> ---
Doesn't compile with GCC 6.4 either:

output/host/bin/powerpc-buildroot-linux-uclibcspe-gcc --version
powerpc-buildroot-linux-uclibcspe-gcc.br_real (Buildroot 2017.08-dirty) 6.4.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

--- Comment #5 from Arnout Vandecappelle <arnout@mind.be> ---
Internal compiler error, so ideally you should report this to upstream GCC. I
would first of all try playing with the command line options like -O3 and -fpic
(replace with e.g. -fPIC) and the -mfloat-gprs and -Wa,-me500x2 options. You
can also try to strip down pcap.c to the minimal thing that exposes the issue -
that is needed for reporting the bug to GCC.

I do assume that the patches in ../../projects/92107-110/br_patches do not
affect libpcap or gcc?

You can also try with an unpatched GCC:
make host-gcc-final-dirclean
make host-gcc-final-extract
mv output/build/host-gcc-final-*/ /tmp/
make HOST_GCC_FINAL_OVERRIDE_SRCDIR=/tmp/host-gcc-final-* libpcap

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[Buildroot] [Bug 10451] libpcap 1.8.x and 1.7x does not compile on PPC

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=10451

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

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

--- Comment #6 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> ---
I'm going to close this bug because this is not a Buildroot bug, but a gcc
issue.

However, I don't think we caught this issue with our autobuilders, which means
our coverage of PowerPC testing isn't great. Karl, would you mind reviewing
https://git.buildroot.org/buildroot/tree/support/config-fragments/autobuild and
see if the set of PowerPC configurations is relevant or not ?

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