[Buildroot] [autobuild.buildroot.net] Build results for 2017-05-18

[Yann E. MORIN]

Thomas, Peter (S), All,

On 2017-05-19 21:44 +0200, Thomas Petazzoni spake thusly:
> >        sparc |                  qt5base-5.8.0 | NOK | http://autobuild.buildroot.net/results/995656a6f9fff594af6b10297253788683a0098f |     
> This would be fixed by:
>   https://patchwork.ozlabs.org/patch/763762/
>   https://patchwork.ozlabs.org/patch/763763/
> I was hoping to get some review/feedback from Peter Seiderer on this.
> Peter, could you have a look?

I am afraid that I may have to withdraw my patches.

I was looking again at this build failure, and we can see that, prior to
checking for atomicfptr, it already tests for libatomic:

    Checking for 64 bit atomics... 
    [...]
    > atomic64.cpp:(.text+0x28): undefined reference to `__atomic_exchange_8'
    > atomic64.cpp:(.text+0x48): undefined reference to `__atomic_compare_exchange_8'
    [...]
    test config.corelib.tests.atomic64 FAILED
    Checking for 64 bit atomics in libatomic... 
    [...]
    [...]/sparc-linux-g++ [...] -Wl,-O1 -o atomic64 atomic64.o -lrt -lpthread -ldl -latomic
     => source accepted.
    test config.corelib.libraries.libatomic succeeded

But then it forgets to link with it when it looks for atomicfptr:

    [...]/sparc-linux-g++ [...] -Wl,-O1 -o atomicfptr atomicfptr.o -lrt -lpthread -ldl
    > atomicfptr.o: In function `test(std::atomic<void (*)(int)> volatile&)':
    > atomicfptr.cpp:(.text+0x4c): undefined reference to `__atomic_compare_exchange_4'

So, in my opinion, the real and correct fix would be to have the
atomicfptr test actually use the result of the previous libatomic test.

I've had a (rather quick) look, and I have no idea on how to do this...
Peter (Seiderer), we'd need some help on this...

Regards,
Yann E. MORIN.

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