ffi: explicitly declare hello_from_rust for C99 (#343)

rust-lang · Feb 25, 2022 · f6d6126 · f6d6126
1 parent 90993ee
commit f6d6126
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/ffi.md b/src/ffi.md
@@ -281,6 +281,8 @@ We'll create a C file to call the `hello_from_rust` function and compile it by `
 C file should look like:
 
 ```c
+extern void hello_from_rust();
+
 int main(void) {
     hello_from_rust();
     return 0;