build fails on raspberry pi 4

[indeedhat]

Im attempting to build on raspbian bullseye (both 32/64 versions have been tried)

Trying to build on a raspberry pi 4 triggers a bunch of assembly errors:

Starting >>> mimick_vendor
--- stderr: mimick_vendor
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S: Assembler messages:
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:29: Error: ARM register expected -- `adr x16,.'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:31: Error: bad instruction `stp x7,x6,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:32: Error: bad instruction `stp x5,x4,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:33: Error: bad instruction `stp x3,x2,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:34: Error: bad instruction `stp x1,x0,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:36: Error: bad instruction `stp x16,x30,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:38: Error: ARM register expected -- `ldr x0,[x16,#-16]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:39: Error: ARM register expected -- `ldr x16,[x0,#8]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:40: Error: bad instruction `blr x16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:42: Error: bad instruction `ldp x16,x30,[sp]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:44: Error: ARM register expected -- `ldr x16,[x16,#-16]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:45: Error: ARM register expected -- `ldr x16,[x16]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:46: Error: bad instruction `blr x16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:47: Error: ARM register expected -- `cmp x0,#0'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:48: Error: unexpected character `n' in type specifier
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:48: Error: bad instruction `b.ne ret_ctx'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:50: Error: bad instruction `ldp x16,x30,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:51: Error: bad instruction `ldp x1,x0,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:52: Error: bad instruction `ldp x3,x2,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:53: Error: bad instruction `ldp x5,x4,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:54: Error: bad instruction `ldp x7,x6,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:56: Error: ARM register expected -- `ldr x16,[x16,#-8]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:57: Error: bad instruction `br x16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:61: Error: bad instruction `ldp x16,x30,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:62: Error: bad instruction `ldp x1,x0,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:63: Error: bad instruction `ldp x3,x2,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:64: Error: bad instruction `ldp x5,x4,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:65: Error: bad instruction `ldp x7,x6,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:66: Error: bad instruction `stp x16,x30,[sp,#-16]!'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:68: Error: ARM register expected -- `ldr x16,[x16,#-16]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:69: Error: ARM register expected -- `ldr x16,[x16,#16]'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:70: Error: bad instruction `blr x16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:72: Error: bad instruction `ldp x16,x30,[sp],#16'
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/asm/trampoline-aarch64.S:73: Error: bad instruction `ret'
gmake[5]: *** [CMakeFiles/mimick.dir/build.make:82: CMakeFiles/mimick.dir/src/asm/trampoline-aarch64.S.o] Error 1
gmake[5]: *** Waiting for unfinished jobs....
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/plt-elf.c: In function ‘lib_dt_lookup’:
/home/pi/ros2_iron/build/mimick_vendor/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e/src/plt-elf.c:75:41: warning: right shift count >= width of type [-Wshift-count-overflow]
   75 |                     && (dyn->d_un.d_ptr >> (MMK_BITS - 8)) ^ 0xff)
      |                                         ^~
gmake[4]: *** [CMakeFiles/Makefile2:210: CMakeFiles/mimick.dir/all] Error 2
gmake[3]: *** [Makefile:160: all] Error 2
gmake[2]: *** [CMakeFiles/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e.dir/build.make:131: mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-prefix/src/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e-stamp/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436
e-build] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:97: CMakeFiles/mimick-e300cc88ed828e41ee8548b489bc0b64b2b6436e.dir/all] Error 2
gmake: *** [Makefile:160: all] Error 2
---
Failed   <<< mimick_vendor [1.72s, exited with code 2]

[svavs]

In my case, on Raspberry OS Lite 32bit, it automatically wrongly detects the aarch64 architecture (it is an armhf) caused by the CMAKE_SYSTEM_PROCESSOR value. I have partially solved by forcing the _ARCH variable of the CMakeLists.txt to arm32 before the if (MSVC) line:

set(_ARCH "arm32")

if (MSVC)
...