Disabel missing initialization warning on GCC 4.9

CMakeLists.txt

@@ -331,6 +331,13 @@ elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
   endif()
   # using GCC
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OSRM_WARNING_FLAGS} -Werror=strict-overflow=1 -Wno-error=maybe-uninitialized -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 ${COLOR_FLAG} -fPIC -ftemplate-depth=1024")
+
+  # Disable missing field initializer since this has a lot of false positives with incomplete curly-braces
+  # initialization support on 4.9
+  if("${CMAKE_CXX_COMPILER_VERSION}" VERSION_EQUAL "4.9" AND NOT MINGW)
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=missing-field-initializers")
+  endif()
+
   if(WIN32) # using mingw
     add_dependency_defines(-DWIN32)
     set(OPTIONAL_SOCKET_LIBS ws2_32 wsock32)