feat: RISC-V miner port package (issue #2298)

rustchain-miner/.cargo/config.toml

@@ -0,0 +1,61 @@
+# Cargo configuration for cross-compilation
+# Place this file at: .cargo/config.toml
+
+[build]
+# Default target - change based on your needs
+# For RISC-V: riscv64gc-unknown-linux-gnu
+# For ARM64: aarch64-unknown-linux-gnu
+# For x86_64: x86_64-unknown-linux-gnu
+# target = "riscv64gc-unknown-linux-gnu"
+
+# RISC-V target configuration
+[target.riscv64gc-unknown-linux-gnu]
+linker = "riscv64-linux-gnu-gcc"
+rustflags = [
+    "-C", "link-arg=-Wl,--allow-multiple-definition",
+    "-C", "target-feature=+m,+a,+f,+d",
+    "-C", "target-cpu=generic-rv64",
+]
+
+[target.riscv64gc-unknown-linux-musl]
+linker = "riscv64-linux-musl-gcc"
+rustflags = [
+    "-C", "link-arg=-Wl,--allow-multiple-definition",
+    "-C", "target-feature=+m,+a,+f,+d",
+    "-C", "target-cpu=generic-rv64",
+]
+
+# ARM64 target configuration
+[target.aarch64-unknown-linux-gnu]
+linker = "aarch64-linux-gnu-gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+[target.aarch64-unknown-linux-musl]
+linker = "aarch64-linux-musl-gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+# x86_64 target configuration
+[target.x86_64-unknown-linux-gnu]
+linker = "gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+[target.x86_64-unknown-linux-musl]
+linker = "musl-gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+# PowerPC64 LE target configuration
+[target.powerpc64le-unknown-linux-gnu]
+linker = "powerpc64le-linux-gnu-gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+# IBM s390x target configuration
+[target.s390x-unknown-linux-gnu]
+linker = "s390x-linux-gnu-gcc"
+rustflags = ["-C", "link-arg=-Wl,--allow-multiple-definition"]
+
+# Helper aliases
+[alias]
+build-riscv = "build --target riscv64gc-unknown-linux-gnu"
+build-riscv-musl = "build --target riscv64gc-unknown-linux-musl"
+build-arm64 = "build --target aarch64-unknown-linux-gnu"
+build-x86_64 = "build --target x86_64-unknown-linux-gnu"