minor fixes to running c/c++ programs

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

README.md

@@ -67,11 +67,12 @@ This downloads the toolchain and runtime files to `~/.cache/nanvix-registry/`.
 
 ```bash
 cd guest-examples
+NANVIX_RELEASE=$(ls -d "$HOME/.cache/nanvix-registry"/*/ | head -n1)
 
 # C program
 docker run --rm \
     -v "$(pwd):/mnt" \
-    -v "$HOME/.cache/nanvix-registry:/nanvix-registry:ro" \
+    -v "$NANVIX_RELEASE:/nanvix-registry:ro" \
     nanvix/toolchain:latest \
     /bin/bash -l -c 'cd /mnt && /opt/nanvix/bin/i686-nanvix-gcc \
         -z noexecstack -T /nanvix-registry/lib/user.ld \
@@ -82,7 +83,7 @@ docker run --rm \
 # C++ program
 docker run --rm \
     -v "$(pwd):/mnt" \
-    -v "$HOME/.cache/nanvix-registry:/nanvix-registry:ro" \
+    -v "$NANVIX_RELEASE:/nanvix-registry:ro" \
     nanvix/toolchain:latest \
     /bin/bash -l -c 'cd /mnt && /opt/nanvix/bin/i686-nanvix-g++ \
         -z noexecstack -T /nanvix-registry/lib/user.ld \

src/bin/hyperlight-nanvix.rs

@@ -49,18 +49,8 @@ async fn setup_registry_command() -> Result<()> {
         println!("\nRegistry setup complete at ~/.cache/nanvix-registry/");
     }
 
-    println!("\nTo compile C/C++ programs:");
-    println!("docker pull nanvix/toolchain:latest");
-    
-    println!("\nCompilation examples:");
-    println!("# C program:");
-    println!("docker run --rm -v \"$(pwd):/mnt\" -v \"$HOME/.cache/nanvix-registry:/nanvix-registry:ro\" nanvix/toolchain:latest /bin/bash -l -c 'cd /mnt && /opt/nanvix/bin/i686-nanvix-gcc -z noexecstack -T /nanvix-registry/lib/user.ld -o hello-c hello-c.c -Wl,--start-group /nanvix-registry/lib/libposix.a /opt/nanvix/i686-nanvix/lib/libc.a -Wl,--end-group'");
-    
-    println!("\n# C++ program:");
-    println!("docker run --rm -v \"$(pwd):/mnt\" -v \"$HOME/.cache/nanvix-registry:/nanvix-registry:ro\" nanvix/toolchain:latest /bin/bash -l -c 'cd /mnt && /opt/nanvix/bin/i686-nanvix-g++ -z noexecstack -T /nanvix-registry/lib/user.ld -o hello-cpp hello-cpp.cpp -Wl,--start-group /nanvix-registry/lib/libposix.a /opt/nanvix/i686-nanvix/lib/libc.a /opt/nanvix/i686-nanvix/lib/libstdc++.a -Wl,--end-group'");
-    
-    println!("\nAfter compilation, run binaries with:");
-    println!("cargo run -- ./hello");
+    println!("\nTo compile and run C/C++ programs, see the README:");
+    println!("https://github.com/hyperlight-dev/hyperlight-nanvix?tab=readme-ov-file#c--c-programs");
 
     Ok(())
 }