webkitgtk: Fix atomic detection on arm architecture

(From OE-Core rev: a77fc49defcf3a30a8f026cfdbd56565750f5a61)

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

meta/recipes-sato/webkit/files/detect_atomics.patch

@@ -0,0 +1,38 @@
+Sourced from https://bugs.webkit.org/show_bug.cgi?id=161900
+
+on arm fixes
+
+| /usr/src/debug/libgcc/6.2.0-r0/gcc-6.2.0/build.arm-oe-linux-gnueabi.arm-oe-linux-gnueabi/libgcc/../../../../../../../work-shared/gcc-6.2.0-r0/gcc-6.2.0/libgcc/config/arm/linux-atomic-64bit.c:117: multiple definition of `__sync_sub_and_fetch_8'
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Backport
+
+diff --git a/Source/WTF/wtf/CMakeLists.txt b/Source/WTF/wtf/CMakeLists.txt
+index 867999e..ea69322 100644
+--- a/Source/WTF/wtf/CMakeLists.txt
++++ b/Source/WTF/wtf/CMakeLists.txt
+@@ -171,7 +171,6 @@ set(WTF_HEADERS
+ 
+ set(WTF_SOURCES
+     Assertions.cpp
+-    Atomics.cpp
+     BitVector.cpp
+     CompilationThread.cpp
+     CrossThreadCopier.cpp
+@@ -276,6 +275,15 @@ if (NOT USE_SYSTEM_MALLOC)
+     list(APPEND WTF_LIBRARIES bmalloc)
+ endif ()
+ 
++file(WRITE ${CMAKE_BINARY_DIR}/test_atomics.cpp
++     "int main(void)\n"
++     "{ long long x = 1; return (int) __sync_add_and_fetch_8(&x, 1); }\n")
++try_compile(ATOMICS_BUILD_SUCCEEDED ${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}/test_atomics.cpp)
++if (NOT ATOMICS_BUILD_SUCCEEDED)
++    list(APPEND WTF_SOURCES Atomics.cpp)
++endif ()
++file(REMOVE ${CMAKE_BINARY_DIR}/test_atomics.cpp)
++
+ list(APPEND WTF_SOURCES
+     unicode/icu/CollatorICU.cpp
+ )

meta/recipes-sato/webkit/webkitgtk_2.14.2.bb

@@ -19,6 +19,7 @@ SRC_URI = "http://www.webkitgtk.org/releases/${BPN}-${PV}.tar.xz \
            file://0001-Fix-racy-parallel-build-of-WebKit2-4.0.gir.patch \
            file://0001-Tweak-gtkdoc-settings-so-that-gtkdoc-generation-work.patch \
            file://0001-WebKitMacros-Append-to-I-and-not-to-isystem.patch \
+           file://detect_atomics.patch \
            "
 
 SRC_URI[md5sum] = "2fe3cadbc546d93ca68a13756c2be015"