Raspbian 11 32-bit: 64-bit kernel compile problem

[aaronwmorris]

The latest version of Raspbian 11 32-bit runs a 64-bit kernel with a 32-bit user space. I think this is causing the compiler to generate the wrong targets with some of the indi-3rdparty libs.

System info:
Raspberry Pi 4 - 4GB RAM

$ uname -a
Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST 2023 aarch64 GNU/Linux

$ getconf LONG_BIT
32

Re-running make on the 3rd-party drivers

$ make
[  5%] Built target indi_skyadventurergti_telescope
[  9%] Built target indi_azgti_telescope
[ 13%] Built target indi_staradventurer2i_telescope
[ 13%] Linking CXX executable indi_ahpgt_telescope
/usr/local/lib/arm-linux-gnueabihf/libahp_gt.so: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make[2]: *** [indi-eqmod/CMakeFiles/indi_ahpgt_telescope.dir/build.make:305: indi-eqmod/indi_ahpgt_telescope] Error 1
make[1]: *** [CMakeFiles/Makefile2:1308: indi-eqmod/CMakeFiles/indi_ahpgt_telescope.dir/all] Error 2
make: *** [Makefile:171: all] Error 2

The library is 64-bit

$ file /usr/local/lib/arm-linux-gnueabihf/libahp_gt.so.1.6.2 
/usr/local/lib/arm-linux-gnueabihf/libahp_gt.so.1.6.2: ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, BuildID[sha1]=186229468b73e69830d08fb874fda944bf25c89b, not stripped

But the library is supposed to be 32-bit

$ file /usr/local/lib/arm-linux-gnueabihf/libindiclient.so.2.0.1
/usr/local/lib/arm-linux-gnueabihf/libindiclient.so.2.0.1: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=9daa2ac844dae8f5f7decd868d198986cba142e4, with debug_info, not stripped

[aaronwmorris]

Just for clarity, you can switch to a 32-bit kernel by adding arm_64bit=0 to /boot/config.txt . I am perfectly willing to do that, but this failure might not be clear for all users.

[aaronwmorris]

After setting arm_64bit=0 the indi 3rdparty libs and drivers compile without issue.