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.
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Building and Running Project:
This project outputs to the console. It can be built and executed
on QEMU as follows:
make qemu
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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
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Sample output:
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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...
66cfcc26bc