Run cc tests if any are found in the examples folder

crates/misc/run-examples/src/main.rs

@@ -51,7 +51,7 @@ fn main() {
             .arg("--example")
             .arg(&example));
 
-        println!("======== C example `{}` ============", example);
+        println!("======== C/C++ example `{}` ============", example);
         let mut cmd = cc::Build::new()
             .opt_level(0)
             .cargo_metadata(false)
@@ -63,30 +63,40 @@ fn main() {
             .warnings(false)
             .get_compiler()
             .to_command();
-        if is_dir {
-            cmd.arg(format!("examples/{}/main.c", example));
-        } else {
-            cmd.arg(format!("examples/{}.c", example));
-        }
-        let exe = if cfg!(windows) {
-            cmd.arg("target/debug/wasmtime.lib")
-                .arg("ws2_32.lib")
-                .arg("advapi32.lib")
-                .arg("userenv.lib")
-                .arg("ntdll.lib")
-                .arg("shell32.lib")
-                .arg("ole32.lib");
-            "./main.exe"
-        } else {
-            cmd.arg("target/debug/libwasmtime.a").arg("-o").arg("foo");
-            "./foo"
-        };
-        if cfg!(target_os = "linux") {
-            cmd.arg("-lpthread").arg("-ldl").arg("-lm");
-        }
-        run(&mut cmd);
 
-        run(&mut Command::new(exe));
+        for extension in ["c", "cc"].iter() {
+            let file = if is_dir {
+                format!("examples/{}/main.{}", example, extension)
+            } else {
+                format!("examples/{}.{}", example, extension)
+            };
+
+            if extension == &"cc" && !std::path::Path::new(&file).exists() {
+                // cc files are optional so we can skip them.
+                continue;
+            }
+
+            cmd.arg(file);
+            let exe = if cfg!(windows) {
+                cmd.arg("target/debug/wasmtime.lib")
+                    .arg("ws2_32.lib")
+                    .arg("advapi32.lib")
+                    .arg("userenv.lib")
+                    .arg("ntdll.lib")
+                    .arg("shell32.lib")
+                    .arg("ole32.lib");
+                "./main.exe"
+            } else {
+                cmd.arg("target/debug/libwasmtime.a").arg("-o").arg("foo");
+                "./foo"
+            };
+            if cfg!(target_os = "linux") {
+                cmd.arg("-lpthread").arg("-ldl").arg("-lm");
+            }
+            run(&mut cmd);
+
+            run(&mut Command::new(exe));
+        }
     }
 }