[Buildroot] Analysis of build results for 2016-08-09

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

Vivien, All,

On 2016-08-13 17:14 -0400, Vivien Didelot spake thusly:
> Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:
> 
> >>     mips64el |                    lldpd-0.9.4 | NOK | http://autobuild.buildroot.net/results/c8a6001f437701ecc75f6c9252935645bda8a8c8/
> >
> > Not sure:
> >
> >   checking if system libevent works as expected... configure: error: *** unusable system libevent
> >
> > Vivien, you are the last person who bumped lldpd, so could you have a
> > look?
> 
> I'm not sure to understand the error.
> 
> Given http://autobuild.buildroot.net/results/c8a/c8a6001f437701ecc75f6c9252935645bda8a8c8/
> here's why I did:
> 
>     buildroot$ git checkout eef80855f1b4533467e04c8e776f1e2f826e5090
>     buildroot$ curl http://autobuild.buildroot.net/results/c8a/c8a6001f437701ecc75f6c9252935645bda8a8c8/config > .config
>     buildroot$ make lldpd
> 
> And this works. What am I doing wrong the reproduce the issue?

I was not able to reproduce it either, and all build failures occur on
Peter's machine:
    http://autobuild.buildroot.org/?reason=lldpd-0.9.4

However, the libevent issue is nto the real issue. The config.log hints
at a much earlier issue:

    [--SNIP--]
    configure:22887: checking for library containing res_init
    configure:22913: /home/peko/autobuild/instance-2/output/host/usr/bin/mips64el-linux-gcc -std=gnu99 -o conftest -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  -isystem /usr/include/bsd -DLIBBSD_OVERLAY   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  conftest.c  -L/home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/lib -lbsd   >&5
    In file included from /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/sys/types.h:29:0,
                     from /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/resolv.h:56,
                     from conftest.c:55:
    /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/bits/types.h:30:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'typedef'
     typedef unsigned char __u_char;
     ^
    In file included from /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/resolv.h:56:0,
                     from conftest.c:55:
    /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/sys/types.h:33:9: error: unknown type name '__u_char'
     typedef __u_char u_char;
             ^
    In file included from /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/sys/types.h:132:0,
                     from /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/resolv.h:56,
                     from conftest.c:55:
    /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/time.h:59:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'typedef'
     typedef __clock_t clock_t;
     ^
    /home/peko/autobuild/instance-2/output/host/usr/mips64el-buildroot-linux-gnu/sysroot/usr/include/time.h:60:1: error: unknown type name '__END_NAMESPACE_STD'
     __END_NAMESPACE_STD
     ^
    [--SNIP--]


On my machine, I got:

    configure:22887: checking for library containing res_init
    configure:22913: /home/ymorin/dev/buildroot/O/host/usr/bin/mips64el-ctng_n64-linux-gnu-gcc -std=gnu99 -o conftest -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  conftest.c  >&5
    configure:22913: $? = 0
    configure:22930: result: none required

This is really weird...

I diff-ed the config.log from the build failure with mine, and I saw a
few differences.

Here's the procedure (libbsd is an implicit dependency, which was built
before lldpd in the autobuild failure, so I built it explicitly):

    $ wget -O .config 'http://autobuild.buildroot.net/results/c8a/c8a6001f437701ecc75f6c9252935645bda8a8c8/config'
    $ make O=/home/ymorin/dev/buildroot/O lldpd-depends libbsd
    $ make O=/home/ymorin/dev/buildroot/O lldpd-configure
    $ wget -O config.log.failed 'http://autobuild.buildroot.net/results/c8a6001f437701ecc75f6c9252935645bda8a8c8/lldpd-0.9.4/config.log'
    $ sed -r -i -e 's:/home/peko/autobuild/instance-2/output/:/home/ymorin/dev/buildroot/O/:g'
        # So that I get the same paths in both log files...
    $ diff -du config.log.failed /home/ymorin/dev/buildroot/O/build/lldpd-0.9.4/config.log

But I can't find any interesting hunk before that failure...

Regards,
Yann E. MORIN.

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