Fix premake build on systems without the 'arch' command - #806
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The 'arch' utility was removed from recent GNU coreutils releases, so
'io.popen("arch")' returns no output and the 'arch' local ends up nil,
failing with 'attempt to concatenate a nil value' in
create_test_experience_runner() (premake5-isaacsim.lua:348).
Fall back to 'uname -m' when 'arch' is unavailable.
Signed-off-by: Yongkie Wiyogo <4080600+ywiyogo@users.noreply.github.com>
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Summary
premake5-isaacsim.lua:340 shells out to the Unix arch command via io.popen. The arch utility was removed from recent GNU coreutils releases, so on systems with newer coreutils the command is not found, io.popen returns no output, and the Lua local arch ends up nil, causing the build to fail with:
Fix
Fall back to uname -m when arch is unavailable:
Testing
Builds successfully on Arch Linux (coreutils 9.11) with ./build.sh --skip-compiler-version-check, where it previously failed.