2014-11-20  Alberto Garcia  <berto@igalia.com>

        Webkit2 doesnt build on powerpc 32 bits
        https://bugs.webkit.org/show_bug.cgi?id=130837

        Reviewed by NOBODY (OOPS!).

        Check if libatomic is needed in order to use std::atomic, and add
        it to the list of WebKit2 libraries.

        * PlatformGTK.cmake:

diff --git a/Source/WebKit2/PlatformGTK.cmake b/Source/WebKit2/PlatformGTK.cmake
index 954aa0e..298ec7c 100644
--- a/Source/WebKit2/PlatformGTK.cmake
+++ b/Source/WebKit2/PlatformGTK.cmake
@@ -467,6 +467,15 @@ list(APPEND NetworkProcess_SOURCES
     NetworkProcess/EntryPoint/unix/NetworkProcessMain.cpp
 )
 
+file(WRITE ${CMAKE_BINARY_DIR}/test_atomic.cpp
+     "#include <atomic>\n"
+     "int main() { std::atomic<int64_t> i(0); i++; return 0; }\n")
+try_compile(ATOMIC_BUILD_SUCCEEDED ${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}/test_atomic.cpp)
+if (NOT ATOMIC_BUILD_SUCCEEDED)
+    list(APPEND WebKit2_LIBRARIES atomic)
+endif ()
+file(REMOVE ${CMAKE_BINARY_DIR}/test_atomic.cpp)
+
 set(SharedWebKit2Libraries
     ${WebKit2_LIBRARIES}
 )