arch/x86/kvm/emulate.c:4091:2: error: call to undeclared function 'F'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] arch/x86/kvm/emulate.c:4093:2: error: field designator cannot initialize a non-struct, non-union type 'u8[7]' (aka 'unsigned char[7]') arch/x86/kvm/emulate.c:4094:2: error: field designator 'flags' does not refer to any field in type 'union (unnamed union at arch/x86/kvm/emulate.c:198:2)' arch/x86/kvm/emulate.c:4094:2: error: field designator 'u' does not refer to any field in type 'union (unnamed union at arch/x86/kvm/emulate.c:198:2)' arch/x86/kvm/emulate.c:4095:2: error: initialization of non-aggregate type 'int (*)(struct x86_emulate_ctxt *)' with a designated initializer list