build: Add preliminary RISC-V (riscv64) build support (#6285)

Author: nullun

crypto/batchverifier.go

@@ -22,6 +22,7 @@ package crypto
 // #cgo linux,amd64 CFLAGS: -I${SRCDIR}/libs/linux/amd64/include
 // #cgo linux,arm64 CFLAGS: -I${SRCDIR}/libs/linux/arm64/include
 // #cgo linux,arm CFLAGS: -I${SRCDIR}/libs/linux/arm/include
+// #cgo linux,riscv64 CFLAGS: -I${SRCDIR}/libs/linux/riscv64/include
 // #cgo windows,amd64 CFLAGS: -I${SRCDIR}/libs/windows/amd64/include
 // #include <stdint.h>
 // enum {

crypto/curve25519.go

@@ -27,6 +27,8 @@ package crypto
 // #cgo linux,arm64 LDFLAGS: ${SRCDIR}/libs/linux/arm64/lib/libsodium.a
 // #cgo linux,arm CFLAGS: -I${SRCDIR}/libs/linux/arm/include
 // #cgo linux,arm LDFLAGS: ${SRCDIR}/libs/linux/arm/lib/libsodium.a
+// #cgo linux,riscv64 CFLAGS: -I${SRCDIR}/libs/linux/riscv64/include
+// #cgo linux,riscv64 LDFLAGS: ${SRCDIR}/libs/linux/riscv64/lib/libsodium.a
 // #cgo windows,amd64 CFLAGS: -I${SRCDIR}/libs/windows/amd64/include
 // #cgo windows,amd64 LDFLAGS: ${SRCDIR}/libs/windows/amd64/lib/libsodium.a
 // #include <stdint.h>

crypto/vrf.go

@@ -21,6 +21,7 @@ package crypto
 // #cgo linux,amd64 CFLAGS: -I${SRCDIR}/libs/linux/amd64/include
 // #cgo linux,arm64 CFLAGS: -I${SRCDIR}/libs/linux/arm64/include
 // #cgo linux,arm CFLAGS: -I${SRCDIR}/libs/linux/arm/include
+// #cgo linux,riscv64 CFLAGS: -I${SRCDIR}/libs/linux/riscv64/include
 // #cgo windows,amd64 CFLAGS: -I${SRCDIR}/libs/windows/amd64/include
 // #include <stdint.h>
 // #include "sodium.h"

installer/external/node_exporter-stable-linux-riscv64.tar.gz

@@ -15,6 +15,8 @@ elif [[ "${ARCH}" = "armv7l" ]]; then
     echo "arm"
 elif [[ "${ARCH}" = "aarch64" ]] || [[ "${ARCH}" = "arm64" ]]; then
     echo "arm64"
+elif [[ "${ARCH}" = "riscv64" ]]; then
+    echo "riscv64"
 else
     # Anything else needs to be specifically added...
     echo "unsupported"