| Title: Test multilib |
| |
| Description: |
| |
| Some architectures support different ISA variants, each backed a different |
| multilib in a same compiler. Selecting wrong multilib may have adverse |
| effects on performance, or sometime produce broken executables altogether |
| (for example, ARM Cortex-M requires thumb2 multilib and will be broken with |
| default ("arm") multilib or "thumb" multlib). This app is a smoke-test |
| for selecting non-wrong multilib - it uses operation(s) which guaranteedly |
| will call support routine(s) in libgcc and checks for expected result. |
| |
| -------------------------------------------------------------------------------- |
| |
| Building and Running Project: |
| |
| This project outputs to the console. It can be built and executed |
| on QEMU as follows: |
| |
| make run |
| |
| -------------------------------------------------------------------------------- |
| |
| Troubleshooting: |
| |
| Problems caused by out-dated project information can be addressed by |
| issuing one of the following commands then rebuilding the project: |
| |
| make clean # discard results of previous builds |
| # but keep existing configuration info |
| or |
| make pristine # discard results of previous builds |
| # and restore pre-defined configuration info |
| |
| -------------------------------------------------------------------------------- |
| |
| Sample output: |
| |
| =================================================================== |
| PASS - main. |
| =================================================================== |
| PROJECT EXECUTION SUCCESSFUL |
| |
| Sample failure output ("thumb" used on Cortex-M instead of "thumb2"): |
| |
| ***** USAGE FAULT ***** |
| Executing thread ID (thread): 0x200002a0 |
| Faulting instruction address: 0x00000000 |
| Illegal use of the EPSR |
| Fatal fault in essential task ! Spinning... |
