Enable riscv64

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

rust.spec

@@ -1,6 +1,6 @@
 # Only x86_64 and i686 are Tier 1 platforms at this time.
 # https://doc.rust-lang.org/nightly/rustc/platform-support.html
-%global rust_arches x86_64 i686 armv7hl aarch64 ppc64le s390x
+%global rust_arches x86_64 i686 armv7hl aarch64 ppc64le s390x riscv64
 
 # The channel can be stable, beta, or nightly
 %{!?channel: %global channel stable}
@@ -76,15 +76,19 @@
 %endif
 
 # LLDB isn't available everywhere...
+%ifnarch riscv64
 %if 0%{?rhel} && 0%{?rhel} < 8
 %bcond_with lldb
 %else
 %bcond_without lldb
 %endif
+%else
+%bcond_with lldb
+%endif
 
 Name:           rust
 Version:        1.64.0
-Release:        1%{?dist}
+Release:        1.0.riscv64%{?dist}
 Summary:        The Rust Programming Language
 License:        (ASL 2.0 or MIT) and (BSD and MIT)
 # ^ written as: (rust itself) and (bundled libraries)
@@ -671,7 +675,7 @@ find -name '*.rs' -type f -perm /111 -exec chmod -v -x '{}' '+'
 %build
 %{export_rust_env}
 
-%ifarch %{arm} %{ix86} s390x
+%ifarch %{arm} %{ix86} s390x riscv64
 # full debuginfo is exhausting memory; just do libstd for now
 # https://github.com/rust-lang/rust/issues/45854
 %if 0%{?rhel} && 0%{?rhel} < 8
@@ -1054,6 +1058,9 @@ end}
 
 
 %changelog
+* Fri Nov 04 2022 David Abdurachmanov <davidlt@rivosinc.com> - 1.64.0-1.0.riscv64
+- Enable riscv64
+
 * Thu Sep 22 2022 Josh Stone <jistone@redhat.com> - 1.64.0-1
 - Update to 1.64.0.
 - Add rust-analyzer.