clang: warning: argument unused during compilation: '-mno-thumb'

[varunxtreem]

Code is not working with xcode 7.3.1 it gives error.
clang: warning: argument unused during compilation: '-mno-thumb'
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:30:10: error: unknown token in expression
push {r4-r7, lr}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:31:17: error: unknown token in expression
add r7, sp, #12
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:32:10: error: unknown token in expression
push {r8, r10, r11}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:33:14: error: unexpected token in argument list
vstmdb sp!, {d8-d15}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:40:5: error: invalid instruction mnemonic 'bl'
bl _objc_autoreleasePoolPush
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:47:5: error: invalid instruction mnemonic 'bl'
bl AppDelegate_Setup
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:54:5: error: invalid instruction mnemonic 'bl'
bl View_Setup
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:66:5: error: unknown use of instruction mnemonic without a size suffix
mov r0, s_delegateClassNameCStr
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:67:5: error: invalid instruction mnemonic 'bl'
bl util_getCFString
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:77:5: error: unknown use of instruction mnemonic without a size suffix
mov r3, r0
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:78:13: error: unknown token in expression
mov r2, #0
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:79:13: error: unknown token in expression
mov r1, #0
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:80:13: error: unknown token in expression
mov r0, #0
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:81:5: error: invalid instruction mnemonic 'bl'
bl _UIApplicationMain
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:88:10: error: unknown token in expression
push {r0}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:89:5: error: invalid instruction mnemonic 'bl'
bl _objc_autoreleasePoolPop
^~
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:90:9: error: unknown token in expression
pop {r0}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:92:14: error: unexpected token in argument list
vldmia sp!, {d8-d15}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:93:9: error: unknown token in expression
pop {r8, r10, r11}
^
/Users/varunnaharia/Downloads/iOSAppInAssembly-master/iOSAppInAssembly/main_ARMv7.s:94:9: error: unknown token in expression
pop {r4-r7, pc}
^
Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1

[richardjrossiii]

I believe this is because it's no longer possible to compile without thumb support -- If anyone is interested in rewriting these as THUMB instructions, I'm certainly open to PRs.

[varunxtreem]

can you please guide me to write thumb instructions

[richardjrossiii]

It's also possible that you're attempting to compile for ARM64 - this example only works with ARMv7s. You'd have to rewrite most instructions to properly work with ARM64.

[CameronBanga]

A bit late, but seeing this issue as well on macOS 10.13.3, using xCode 9.2.

I'm attempting to compile with ARMv7s, but no luck. Haven't had a chance to play around with it, but will take a look and if I come up with anything new, I'll post here.