pulseaudio: remove BR2_ARCH_HAS_ATOMICS dependency

pulseaudio is able to either use the atomic __sync builtins from the
compiler, or to rely on libatomic_ops for atomic operations. However,
since it anyway selects json-c which requires the __sync built-ins, it
means using libatomic_ops is useless: even if you use libatomic_ops
for pulseaudio, you'd still get a link error in pulseaudio due to the
missing __sync built-in for the json-c library.

Also, since pulseaudio now inherits the BR2_TOOLCHAIN_HAS_SYNC_4 from
json-c, which matches the __sync built-in from pulseaudio, this
commit:

 - Drops the BR2_ARCH_HAS_ATOMICS dependency
 - Forces pulseaudio to not detect libatomic_ops
 - Propagates the removal of BR2_ARCH_HAS_ATOMICS dependency to
   pulseaudio's reverse dependencies.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

1 files changed, 6 insertions, 1 deletions

diff --git a/package/pulseaudio/pulseaudio.mk b/package/pulseaudio/pulseaudio.mk
index 845009043a..86bbb2fe1e 100644
--- a/package/pulseaudio/pulseaudio.mk
+++ b/package/pulseaudio/pulseaudio.mk
@@ -15,9 +15,14 @@ PULSEAUDIO_CONF_OPTS = \
 	--disable-legacy-database-entry-format \
 	--disable-manpages
 
+# Make sure we don't detect libatomic_ops. Indeed, since pulseaudio
+# requires json-c, which needs 4 bytes __sync builtins, there should
+# be no need for pulseaudio to rely on libatomic_ops.
+PULSE_AUDIO_CONF_ENV += \
+	ac_cv_header_atomic_ops_h=no
+
 PULSEAUDIO_DEPENDENCIES = \
 	host-pkgconf libtool json-c libsndfile speex host-intltool \
-	$(if $(BR2_PACKAGE_LIBATOMIC_OPS),libatomic_ops) \
 	$(if $(BR2_PACKAGE_LIBSAMPLERATE),libsamplerate) \
 	$(if $(BR2_PACKAGE_ALSA_LIB),alsa-lib) \
 	$(if $(BR2_PACKAGE_LIBGLIB2),libglib2) \