chore: improve docs

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

2 files changed, 11 insertions, 1 deletions

diff --git a/examples/rust/build.sh b/examples/rust/build.sh
index 5450345..cabf00e 100755
--- a/examples/rust/build.sh
+++ b/examples/rust/build.sh
@@ -6,11 +6,13 @@ exclude_wat=("tinywasm")
 out_dir="./target/wasm32-unknown-unknown/wasm"
 dest_dir="out"
 
+features="+reference-types,+bulk-memory,+mutable-globals"
+
 # ensure out dir exists
 mkdir -p "$dest_dir"
 
 for bin in "${bins[@]}"; do
-    RUSTFLAGS="-C target-feature=+reference-types,+bulk-memory -C panic=abort" cargo build --target wasm32-unknown-unknown --package rust-wasm-examples --profile=wasm --bin "$bin"
+    RUSTFLAGS="-C target-feature=$features -C panic=abort" cargo build --target wasm32-unknown-unknown --package rust-wasm-examples --profile=wasm --bin "$bin"
 
     cp "$out_dir/$bin.wasm" "$dest_dir/"
     wasm-opt "$dest_dir/$bin.wasm" -o "$dest_dir/$bin.wasm" -O --intrinsic-lowering -O
diff --git a/examples/rust/src/fibonacci.rs b/examples/rust/src/fibonacci.rs
index 3e4be73..7924aef 100644
--- a/examples/rust/src/fibonacci.rs
+++ b/examples/rust/src/fibonacci.rs
@@ -19,3 +19,11 @@ pub extern "C" fn fibonacci(n: i32) -> i32 {
     }
     sum
 }
+
+#[no_mangle]
+pub extern "C" fn fibonacci_recursive(n: i32) -> i32 {
+    if n <= 1 {
+        return n;
+    }
+    fibonacci_recursive(n - 1) + fibonacci_recursive(n - 2)
+}