Try to enable rust-analyzer for riscv64

This is the 2nd attempt.

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

rust-enable-ra-for-riscv64.patch

@@ -0,0 +1,17 @@
+diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
+index 12585e80e..360b7b6c7 100644
+--- a/src/bootstrap/dist.rs
++++ b/src/bootstrap/dist.rs
+@@ -1086,12 +1086,6 @@ impl Step for RustAnalyzer {
+         let compiler = self.compiler;
+         let target = self.target;
+ 
+-        if target.contains("riscv64") {
+-            // riscv64 currently has an LLVM bug that makes rust-analyzer unable
+-            // to build. See #74813 for details.
+-            return None;
+-        }
+-
+         let rust_analyzer = builder
+             .ensure(tool::RustAnalyzer { compiler, target })
+             .expect("rust-analyzer always builds");

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:        1.66.1
-Release:        1%{?dist}
+Release:        1.1.riscv64%{?dist}
 Summary:        The Rust Programming Language
 License:        (ASL 2.0 or MIT) and (BSD and MIT)
 # ^ written as: (rust itself) and (bundled libraries)
@@ -131,6 +135,8 @@ Patch101:       rustc-1.65.0-disable-http2.patch
 # (affects RHEL6 kernels when building for RHEL7)
 Patch102:       rustc-1.65.0-no-default-pie.patch
 
+# Enable rust-analyzer on riscv64
+Patch103:       rust-enable-ra-for-riscv64.patch
 
 # Get the Rust triple for any arch.
 %{lua: function rust_triple(arch)
@@ -606,6 +612,8 @@ rm -rf vendor/libnghttp2-sys/
 %patch102 -p1
 %endif
 
+%patch103 -p1
+
 # Use our explicit python3 first
 sed -i.try-python -e '/^try python3 /i try "%{__python3}" "$@"' ./configure
 
@@ -676,7 +684,7 @@ find -name '*.rs' -type f -perm /111 -exec chmod -v -x '{}' '+'
 %build
 %{export_rust_env}
 
-%ifarch %{arm} %{ix86}
+%ifarch %{arm} %{ix86} 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
@@ -1056,6 +1064,13 @@ end}
 
 
 %changelog
+* Mon Jan 16 2022 David Abdurachmanov <davidlt@rivosinc.com> - 1.66.1-1.1.riscv64
+- Enable riscv-analyzer for riscv64
+
+* Fri Jan 13 2022 David Abdurachmanov <davidlt@rivosinc.com> - 1.66.1-1.0.riscv64
+- Do not package rust-analyzer on riscv64
+- Enable riscv64
+
 * Tue Jan 10 2023 Josh Stone <jistone@redhat.com> - 1.66.1-1
 - Update to 1.66.1.
 - Security fix for CVE-2022-46176