ARM questions

So, I have a few questions about the ARM support in Angelscript.

1. Can I use as_callfunc_arm_gcc.S with clang, or is this specifically for gcc?

2. My compiler is complaining about casting a 64 bit void* to asDWORD in as_callfunc_arm.cpp, on lines like these, where secondObject is a void*. Can I ignore this as just a warning instead, or is that unsafe?

paramBuffer[dpos++]=(asDWORD)secondObject;

Thanks!