user/firefox-esr (68.10.0): FTBFS: ERROR: Could not find LLVM/Clang installation for compiling bindgen.
Found on aarch64:
...
0:16.62 checking for rustc... /usr/bin/rustc
0:16.62 checking for cargo... /usr/bin/cargo
0:17.00 checking rustc version... 1.60.0
0:17.02 checking cargo version... 1.60.0
0:17.32 checking for rust target triplet... aarch64-foxkit-linux-musl
0:17.52 checking for rust host triplet... aarch64-foxkit-linux-musl
0:17.52 checking for rustdoc... /usr/bin/rustdoc
0:17.54 checking for cbindgen... /usr/bin/cbindgen
0:17.54 checking for rustfmt... not found
0:17.55 checking for llvm-config... not found
0:17.55 ERROR: Could not find LLVM/Clang installation for compiling bindgen.
0:17.55 Please specify the 'LLVM_CONFIG' environment variable
0:17.55 (recommended), pass the '--with-libclang-path' and '--with-clang-path'
0:17.55 options to configure, or put 'llvm-config' in your PATH. Altering your
0:17.55 PATH may expose 'clang' as well, potentially altering your compiler,
0:17.55 which may not be what you intended.
0:17.65 *** Fix above errors and then restart with\
0:17.65 "./mach build"
0:17.65 make: *** [client.mk:115: configure] Error 1
>>> ERROR: firefox-esr: build failed
Likely due to new LLVM.