mesa: Help compile with clang/mips

meson is detecting it does not support 64bit attomics but then when
defining local suppliments confused clang

../mesa-19.3.1/src/util/u_atomic.c:38:1: error: cannot redeclare builtin function '__sync_add_and_fetch_8'
__sync_add_and_fetch_8(uint64_t *ptr, uint64_t val)
^
../mesa-19.3.1/src/util/u_atomic.c:38:1: note: '__sync_add_and_fetch_8' is a builtin with type 'long long (volatile long long *, long long, ...)'
../mesa-19.3.1/src/util/u_atomic.c:38:1: error: definition of builtin function '__sync_add_and_fetch_8'
__sync_add_and_fetch_8(uint64_t *ptr, uint64_t val)
^

(From OE-Core rev: a18ad964d000a15ac4039c893dd9d3f8e545c223)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/meta/recipes-graphics/mesa/files/0001-meson-misdetects-64bit-atomics-on-mips-clang.patch b/meta/recipes-graphics/mesa/files/0001-meson-misdetects-64bit-atomics-on-mips-clang.patch
new file mode 100644
index 0000000000..15485feb71
--- /dev/null
+++ b/meta/recipes-graphics/mesa/files/0001-meson-misdetects-64bit-atomics-on-mips-clang.patch
@@ -0,0 +1,27 @@
+From bb2f0bea553d51d659a9bc46f7ae186885405151 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 13 Jan 2020 15:23:47 -0800
+Subject: [PATCH] meson misdetects 64bit atomics on mips/clang
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/util/u_atomic.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/util/u_atomic.c b/src/util/u_atomic.c
+index e4bffa8..58e1ddd 100644
+--- a/src/util/u_atomic.c
++++ b/src/util/u_atomic.c
+@@ -21,7 +21,7 @@
+  * IN THE SOFTWARE.
+  */
+ 
+-#if defined(MISSING_64BIT_ATOMICS) && defined(HAVE_PTHREAD)
++#if !defined(__clang__) && defined(MISSING_64BIT_ATOMICS) && defined(HAVE_PTHREAD)
+ 
+ #include <stdint.h>
+ #include <pthread.h>
+-- 
+2.24.1
+