Cargo build --release fails

Tech Support
1

cargo build --release end poorly with

— stderr
thread ‘main’ panicked at ‘Unable to find libclang: “couldn’t find any of [‘libclang.so’, ‘libclang.so.’, 'libclang-.so’], set the LIBCLANG_PATH environment variable to a path where one of these files can be found (skipped: [])”’, src/libcore/result.rs:997:5
note: Run with RUST_BACKTRACE=1 environment variable to display a backtrace.

warning: build failed, waiting for other jobs to finish…
error: build failed

boxi /home/markus/grin/wallet713 # locate libclang.so
/usr/lib64/llvm/7/lib32/libclang.so
/usr/lib64/llvm/7/lib32/libclang.so.7
/usr/lib64/llvm/7/lib64/libclang.so
/usr/lib64/llvm/7/lib64/libclang.so.7

Where to find configs for this or is somewhere a working bin . or a gentoo overlay maybe?

2

May be you should install llvm first.

and also see this https://github.com/mimblewimble/grin/issues/1606

3

As you can see I have both 32 and 64 bit llvm installed - multilib where is this variable located LIBCLANG_PATH