> -----Ursprüngliche Nachricht----- > Von: Sebastian Huber [mailto:sebastian.hu...@embedded-brains.de] > Gesendet: Montag, 27. Februar 2017 15:25 > An: Sommer, Jan; devel@rtems.org > Betreff: Re: AW: AW: AW: Undefined reference to > `__sync_bool_compare_and_swap_4' for some Leon configurations with > gfortran > > > > On 27/02/17 15:15, jan.som...@dlr.de wrote: > >> -----Ursprüngliche Nachricht----- > >> >Von: Sebastian Huber [mailto:sebastian.hu...@embedded-brains.de] > >> >Gesendet: Montag, 27. Februar 2017 15:11 > >> >An: Sommer, Jan;devel@rtems.org > >> >Betreff: Re: AW: AW: Undefined reference to > >> >`__sync_bool_compare_and_swap_4' for some Leon configurations with > >> >gfortran > >> > > >> >On 27/02/17 15:08,jan.som...@dlr.de wrote: > >>> > >Ok, thanks for the clarification. > >>> > >I will try to create a patch for gcc and put rtems CC for the > >>> > >discussion. > >> > > >> >Another option would be to provide the __sync_() stuff also via libatomic. > >> > > > True. I will ask on the gcc mailinglist what they would prefer. > > > > This __sync_() stuff seems to be used in several places in GCC. So, changing > libbacktrace is probably not enough. We need a general solution for the > __sync_() builtins on RTEMS. I don't think GCC can be changed to emit > __atomic_() calls for the __sync_() builtins (I would still try to ask). The > libgcc or > libatomic is probably a good place to add them for RTEMS as functions > implemented via __atomic_() builtins. >
I updated the __sync-check of libbacktrace and now the undefined references are gone and my test program compiles. If there are no objections I would try to push something like the attached patch upstream. Do you have any suggestions to which branches? I thought about trunk and the gcc-6 branch or do we need further backports for older RTEMS versions? Best regards, Jan > -- > Sebastian Huber, embedded brains GmbH > > Address : Dornierstr. 4, D-82178 Puchheim, Germany > Phone : +49 89 189 47 41-16 > Fax : +49 89 189 47 41-09 > E-Mail : sebastian.hu...@embedded-brains.de > PGP : Public key available on request. > > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
fix-leon2-libbacktrace.patch
Description: fix-leon2-libbacktrace.patch
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