我尝试使用命令行编译包含ARM代码的iOS项目。
这是命令行：
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/as -arch armv6 engines/scumm/smush/codec47ARM.s -o engines/scumm/smush/codec47ARM.o
......以下是错误：
engines/scumm/smush/codec47ARM.s:29:Unknown pseudo-op: .global
engines/scumm/smush/codec47ARM.s:29:Rest of line ignored. 1st junk character valued 95 (_).
engines/scumm/smush/codec47ARM.s:43:bad instruction `STMFD r13!,{r2,r4-r11,R14}'
engines/scumm/smush/codec47ARM.s:45:bad instruction `LDR r4,[r13,#40]'
engines/scumm/smush/codec47ARM.s:48:bad instruction `SUB r4,r4,#0xF8'
engines/scumm/smush/codec47ARM.s:55:bad instruction `ADD r7,r2,#7'
engines/scumm/smush/codec47ARM.s:56:bad instruction `MOV r7,r7,LSR#3'
如果我尝试使用gcc（或clang）进行编译，则会收到以下错误：
engines/scumm/smush/codec47ARM.s:162:2: error: invalid instruction
LDREQB r6,[r1],#1 @ r6 = t = *_d_src++
^
engines/scumm/smush/codec47ARM.s:279:2: error: invalid instruction
LDREQB r6,[r1],#1 @ r6 = t = *_d_src++
^
engines/scumm/smush/codec47ARM.s:330:2: error: invalid instruction
LDRLTB r6,[r4,r6] @ r6 = t = _paramPtr[code]
^
我做错了什么？我相信ARMv6应该支持MOV，ADD等。