Merge r228370 - [MIPS] JSC needs to be built with -latomic

https://bugs.webkit.org/show_bug.cgi?id=182610

Reviewed by Žan Doberšek.

Since r228149, on MIPS we need to link with -latomic, because
__atomic_fetch_add_8 is not available as a compiler intrinsic.

* CMakeLists.txt:

Source/JavaScriptCore/CMakeLists.txt

@@ -118,6 +118,16 @@ set(JavaScriptCore_LIBRARIES
     ${LLVM_LIBRARIES}
 )
 
+# Since r228149, on MIPS we need to link with -latomic, because
+# __atomic_fetch_add_8 is not available as a compiler intrinsic. It is
+# available on other platforms (including 32-bit Arm), so the link with
+# libatomic is only neede on MIPS.
+if (WTF_CPU_MIPS)
+    list(APPEND JavaScriptCore_LIBRARIES
+        -latomic
+    )
+endif ()
+
 set(JavaScriptCore_SCRIPTS_SOURCES_DIR "${JAVASCRIPTCORE_DIR}/Scripts")
 
 # Globbing relies on the fact that generator-specific file names are prefixed with their directory.

Source/JavaScriptCore/ChangeLog

@@ -1,3 +1,15 @@
+2018-02-11  Guillaume Emont  <guijemont@igalia.com>
+
+        [MIPS] JSC needs to be built with -latomic
+        https://bugs.webkit.org/show_bug.cgi?id=182610
+
+        Reviewed by Žan Doberšek.
+
+        Since r228149, on MIPS we need to link with -latomic, because
+        __atomic_fetch_add_8 is not available as a compiler intrinsic.
+
+        * CMakeLists.txt:
+
 2018-01-28  Filip Pizlo  <fpizlo@apple.com>
 
         Global objects should be able to use TLCs to allocate from different blocks from each other