js.c:17:32: error: option ‘-Winvalid-offsetof’ is valid for C++/ObjC++ but not for C [-Werror=pragmas]
 #pragma GCC diagnostic ignored "-Winvalid-offsetof"
                                ^~~~~~~~~~~~~~~~~~~~
js.c:21:32: error: option ‘-Winvalid-offsetof’ is valid for C++/ObjC++ but not for C [-Werror=pragmas]
 #pragma GCC diagnostic warning "-Winvalid-offsetof"
                                ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../../Makefile.common:104: recipe for target 'js.o' failed