module llvm.va_list; alias void* va_list; /* version(X86) { alias void* va_list; } else version(X86_64) { struct X86_64_va_list { uint gp_offset; uint fp_offset; void* overflow_arg_area; void* reg_save_area; } alias X86_64_va_list va_list; } else static assert("only x86 and x86-64 support va_list"); */