aarch64 rust install failure

[Ron Georgia <netverbs%gmail.com@localhost>]

I have a Pinebook 1080P. I tried to build firefox on it and after three days of building I got the error listed below. I tried to install rustup but got an error; no evbarm. I added evbarm to the rust-init.sh switch statement. Another error I keep running into is libstdc++.so.8 not found.
    
    evbarm)
                _cputype=aarch64
                ;;
    
    Now when I run it I get this error:
    
    $ ./rustup-init.sh
    info: downloading installer
    curl: (22) The requested URL returned error: 404 Not Found
    rustup: command failed: downloader https://static.rust-lang.org/rustup/dist/aarch64-unknown-netbsd/rustup-init /tmp/mktemp.eaADP6ji/rustup-init
    
    
    MAKE INSTALL ERROR FOR FIREFOX
    error: process didn't exit successfully: `/usr/pkgsrc/lang/rust/work/rust-bootstrap/bin/rustc -vV` (exit code: 1)
    --- stdout
    rustc 1.35.0
    binary: rustc
    commit-hash: unknown
    commit-date: unknown
    host: aarch64-unknown-netbsd
    release: 1.35.0
    
    --- stderr
    error: couldn't load codegen backend "/usr/pkgsrc/lang/rust/work/rust-bootstrap/lib/rustlib/aarch64-unknown-netbsd/codegen-backends/librustc_codegen_llvm-llvm.so": "/usr/pkgsrc/lang/rust/work/rust-bootstrap/lib/rustlib/aarch64-unknown-netbsd/codegen-backends/librustc_codegen_llvm-llvm.so: Shared object \"libstdc++.so.8\" not found"
    
    
    Traceback (most recent call last):
      File "./x.py", line 11, in <module>
        bootstrap.main()
      File "/usr/pkgsrc/lang/rust/work/rustc-1.35.0-src/src/bootstrap/bootstrap.py", line 849, in main
        bootstrap(help_triggered)
      File "/usr/pkgsrc/lang/rust/work/rustc-1.35.0-src/src/bootstrap/bootstrap.py", line 820, in bootstrap
        build.build_bootstrap()
      File "/usr/pkgsrc/lang/rust/work/rustc-1.35.0-src/src/bootstrap/bootstrap.py", line 656, in build_bootstrap
        run(args, env=env, verbose=self.verbose)
      File "/usr/pkgsrc/lang/rust/work/rustc-1.35.0-src/src/bootstrap/bootstrap.py", line 141, in run
        raise RuntimeError(err)
    RuntimeError: failed to run: /usr/pkgsrc/lang/rust/work/rust-bootstrap/bin/cargo build --manifest-path /usr/pkgsrc/lang/rust/work/rustc-1.35.0-src/src/bootstrap/Cargo.toml --frozen
    *** Error code 1
    
    Stop.
    make[2]: stopped in /usr/pkgsrc/lang/rust
    *** Error code 1
    
    Stop.
    make[1]: stopped in /usr/pkgsrc/lang/rust
    *** Error code 1
    
    Stop.
    make: stopped in /usr/pkgsrc/www/firefox60
    
    Ron Georgia
    “90% of my problems are due to ignorance, the other 10% is because I just don’t know any better.”