Add a compat stdatomic.h implementation based on suncc atomics

Adapted from the code by Rémi Denis-Courmont from VLC

This merges libav commit bb81ed476569b912a37ed553e756e123b6b13b14.

Signed-off-by: Wan-Teh Chang <wtc@google.com>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/configure b/configure
index 2a77be9a0c..dfe9bf881e 100755
--- a/configure
+++ b/configure
@@ -6386,6 +6386,8 @@ if disabled stdatomic_h; then
         add_cppflags '-I\$(SRC_PATH)/compat/atomics/gcc'
     elif enabled atomics_win32; then
         add_cppflags '-I\$(SRC_PATH)/compat/atomics/win32'
+    elif enabled atomics_suncc; then
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/suncc'
     fi
 fi