Bug#874531: mesa: FTBFS on armel: __atomic_fetch_add_8 undefined

["Aaron M. Ucko" <ucko@debian.org>]

Source: mesa
Version: 17.2.0-2
Severity: serious
Tags: upstream
Justification: fails to build from source (but built successfully in the past)

Builds of mesa for armel have been failing lately:

  glsl/.libs/libstandalone.a(libmesautil_la-disk_cache.o): In function `disk_cache_remove':
  ./build/src/util/../../../src/util/disk_cache.c:643: undefined reference to `__atomic_fetch_add_8'
  collect2: error: ld returned 1 exit status
  Makefile:2110: recipe for target 'glsl_compiler' failed
  make[5]: *** [glsl_compiler] Error 1
  make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/src/compiler'

Please link glsl_compiler (and anything else that uses libstandalone)
against -latomic.  If you don't want that dependency on architectures
that don't need it, you can either conditionalize on architecture or
precede -latomic with -Wl,--as-needed (and follow it with
-Wl,--no-as-needed if desired).

Thanks!

-- 
Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu