update build_gnu_docker.sh

docker/build_gnu_docker.sh

@@ -1,28 +1,19 @@
 #!/bin/sh
 
-echo "start build_gnu_docker"
-echo "TARGETARCH: " $TARGETARCH
-echo "TARGETPLATFORM: " $TARGETPLATFORM
-echo "BUILDPLATFORM: " $BUILDPLATFORM
-
 CARGO_BUILD_TARGET="x86_64-unknown-linux-gnu"
 if [ "$TARGETPLATFORM" = "linux/arm64" ]; then
+  apt-get update && apt-get install -y aarch64-linux-gnu-gcc
   CARGO_BUILD_TARGET="aarch64-unknown-linux-gnu"
 fi
 
+echo "start build_gnu_docker"
+echo "TARGETARCH: " $TARGETARCH
+echo "TARGETPLATFORM: " $TARGETPLATFORM
+echo "BUILDPLATFORM: " $BUILDPLATFORM
 echo "CARGO_BUILD_TARGET: " $CARGO_BUILD_TARGET
 
-if [ "$TARGETPLATFORM" = "linux/arm64" ];
-then
-  echo "build aarch64-unknown-linux-gnu" $TARGETPLATFORM
-  rustup target add aarch64-unknown-linux-gnu
-  cargo build --release --target aarch64-unknown-linux-gnu
-  mv target/aarch64-unknown-linux-gnu/release/rnacos /usr/bin/rnacos
-else
-  echo "build  x86_64-unknown-linux-gnu" $TARGETPLATFORM
-  rustup target add x86_64-unknown-linux-gnu
-  cargo build --release --target x86_64-unknown-linux-gnu
-  mv target/x86_64-unknown-linux-gnu/release/rnacos /usr/bin/rnacos
-fi
+rustup target add $CARGO_BUILD_TARGET
+cargo build --release --target $CARGO_BUILD_TARGET
+mv target/$CARGO_BUILD_TARGET/release/rnacos /usr/bin/rnacos
 
 echo "end build_gnu_docker"