Add a C++ test

gcc-test/build.rs

@@ -13,11 +13,6 @@ fn main() {
                 .include("src/include")
                 .compile("libbar.a");
 
-    gcc::Config::new()
-                .file("src/bar1.c")
-                .file("src/bar2.c")
-                .compile("libbar.a");
-
     let target = std::env::var("TARGET").unwrap();
     let file = target.split("-").next().unwrap();
     let file = format!("src/{}.{}", file,
@@ -25,4 +20,9 @@ fn main() {
     gcc::Config::new()
                 .file(file)
                 .compile("libasm.a");
+
+    gcc::Config::new()
+                .file("src/baz.cpp")
+                .cpp(true)
+                .compile("libbaz.a");
 }

gcc-test/src/baz.cpp

@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+extern "C" int32_t
+baz() {
+  int *a = new int(8);
+  int b = *a;
+  delete a;
+  return b;
+}

gcc-test/src/lib.rs

@@ -5,4 +5,6 @@ extern {
     pub fn bar2() -> i32;
 
     pub fn asm() -> i32;
+
+    pub fn baz() -> i32;
 }

gcc-test/tests/all.rs

@@ -17,10 +17,16 @@ fn bar_here() {
     }
 }
 
-
 #[test]
 fn asm_here() {
     unsafe {
         assert_eq!(asm(), 7);
     }
 }
+
+#[test]
+fn baz_here() {
+    unsafe {
+        assert_eq!(baz(), 8);
+    }
+}