Re: [PATCH] scripts: rust_is_available: check for empty libclang version

[Martin Rodriguez Reboredo <yakoyoku@gmail.com>]

On 5/7/23 05:41, Matthew Leach wrote:
> If bindgen can't find libclang, then bindgen will panic with the
> following error:
> 
> thread 'main' panicked at 'Unable to find libclang: "couldn't find any
> valid shared libraries matching: ['libclang.so', 'libclang-*.so',
> 'libclang.so.*', 'libclang-*.so.*'], set the `LIBCLANG_PATH` environment
> variable to a path where one of these files can be found.
> 
> This is outputted to stderr, leaving stdout empty. The empty string is
> then passed to get_canonical_version and the following is show to the
> user:
> 
> $ make LLVM=1 rustavailable
> ./scripts/rust_is_available.sh: line 21: 100000 *  + 100 *  + : syntax error: operand expected (error token is "+ ")
> make: *** [Makefile:1825: rustavailable] Error 1
> 
> Note: bindgen's bad exit code isn't caught by 'set -e' since it is ran
> in a subshell.
> 
> Fix this by prnting out a more helpful error message if the output of
> bindgen is empty.
> 
> Signed-off-by: Matthew Leach <dev@mattleach.net>
> ---
> [...]

Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>