build: Drop unused G_ATOMIC_OP_MEMORY_BARRIER_NEEDED

See the previous commit.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

Helps: #1323

glib/glibconfig.h.in

@@ -147,7 +147,6 @@ typedef unsigned @glib_intptr_type_define@ guintptr;
 #define G_THREADS_ENABLED
 #define G_THREADS_IMPL_@g_threads_impl_def@
 
-#mesondefine G_ATOMIC_OP_MEMORY_BARRIER_NEEDED
 #mesondefine G_ATOMIC_LOCK_FREE
 
 #define GINT16_TO_@g_bs_native@(val)	((gint16) (val))

gobject/tests/meson.build

@@ -105,7 +105,7 @@ foreach test_name, extra_args : gobject_tests
 
   # FIXME: https://gitlab.gnome.org/GNOME/glib/issues/1316
   # aka https://bugs.debian.org/880883
-  if test_name == 'closure-refcount' and ['arm', 'aarch64'].contains(host_cpu_family)
+  if test_name == 'closure-refcount' and ['arm', 'aarch64'].contains(host_machine.cpu_family())
     timeout = timeout * 10
   endif
 

meson.build

@@ -1676,18 +1676,6 @@ foreach d : inet_defines
   glibconfig_conf.set(d[1], val)
 endforeach
 
-# We need a more robust approach here...
-host_cpu_family = host_machine.cpu_family()
-if host_cpu_family == 'x86' or host_cpu_family == 'x86_64' or host_cpu_family == 's390' or host_cpu_family == 's390x' or host_cpu_family.startswith('arm') or host_cpu_family == 'aarch64' or host_cpu_family.startswith('crisv32') or host_cpu_family.startswith('etrax')
-  glib_memory_barrier_needed = false
-elif host_cpu_family.startswith('sparc') or host_cpu_family.startswith('alpha') or host_cpu_family.startswith('powerpc') or host_cpu_family == 'ia64'
-  glib_memory_barrier_needed = true
-else
-  warning('Unknown host cpu: ' + host_cpu_family)
-  glib_memory_barrier_needed = true
-endif
-glibconfig_conf.set('G_ATOMIC_OP_MEMORY_BARRIER_NEEDED', glib_memory_barrier_needed)
-
 # We need to decide at configure time if GLib will use real atomic
 # operations ("lock free") or emulated ones with a mutex.  This is
 # because we must put this information in glibconfig.h so we know if