[erlang-bugs] Conflicting types for ‘ethr_native_dw_atomic_t’ on armv7a-hardfloat-linux-gnueabi

[Mikael Pettersson]

Dirkjan Ochtman writes:
 > Hi there,
 > 
 > I'm the package maintainer for Erlang on Gentoo. Recently, I got this
 > bug report:
 > 
 > https://bugs.gentoo.org/show_bug.cgi?id=537570
 > 
 > Apparently, with gcc-4.8.4, there's this problem:
 > 
 > In file included from ../include/internal/gcc/ethread.h:48:0,
 >                  from ../include/internal/ethread.h:368,
 >                  from beam/erl_threads.h:264,
 >                  from beam/erl_smp.h:27,
 >                  from beam/sys.h:434,
 >                  from beam/export.h:24,
 >                  from armv7a-hardfloat-linux-gnueabi/erl_pbifs.c:9:
 > ../include/internal/gcc/ethr_dw_atomic.h:81:3: error: conflicting
 > types for ‘ethr_native_dw_atomic_t’
 >  } ethr_native_dw_atomic_t;
 > 
 > I looked around the source tree a bit, but since the erl_pbifs.c seems
 > to be generated by a Perl script and my Perl skills aren't so strong,
 > I couldn't really figure out the problem.
 > 
 > Cheers,
 > 
 > Dirkjan
 > 
 > P.S. I'm not subscribed to erlang-bugs, please CC me on any replies.

I believe there may be a conflict between the code paths for libatomic_ops
and gcc's sync primitives.  Try configuring with --with-libatomic_ops=no.

/Mikael