8 files changed, 73 insertions, 0 deletions
diff --git a/test/c-from-rust/TARGETS b/test/c-from-rust/TARGETS
new file mode 100644
index 0000000..7da2055
--- /dev/null
+++ b/test/c-from-rust/TARGETS
@@ -0,0 +1,13 @@
+{ "main":
+  { "type": ["rules/rust", "binary"]
+  , "name": ["main"]
+  , "crate_root": ["main.rs"]
+  , "deps": [["./", "clib", "foo"]]
+  }
+, "c-from-rust":
+  { "type": ["@", "rules-cc", "shell/test", "script"]
+  , "name": ["c-from-rust"]
+  , "test": ["check_ints.sh"]
+  , "deps": ["main"]
+  }
+}
diff --git a/test/c-from-rust/check_ints.sh b/test/c-from-rust/check_ints.sh
new file mode 100644
index 0000000..00780c3
--- /dev/null
+++ b/test/c-from-rust/check_ints.sh
@@ -0,0 +1,5 @@
+set -e
+
+for i in `seq 1 42`; do
+    ./main -$i | grep " -$i is $i"
+done
diff --git a/test/c-from-rust/clib/TARGETS b/test/c-from-rust/clib/TARGETS
new file mode 100644
index 0000000..c72e90b
--- /dev/null
+++ b/test/c-from-rust/clib/TARGETS
@@ -0,0 +1,19 @@
+{ "foo":
+  { "type": ["@", "rules-cc", "CC", "library"]
+  , "pure C": ["true"]
+  , "name": ["foo"]
+  , "srcs": ["foo.c"]
+  , "hdrs": ["foo.h"]
+  , "stage": ["foo"]
+  , "deps": ["bar"]
+  }
+, "bar":
+  { "type": ["@", "rules-cc", "CC", "library"]
+  , "pure C": ["true"]
+  , "name": ["bar"]
+  , "srcs": ["bar.c"]
+  , "hdrs": ["bar.h"]
+  , "ldflags": ["-lm"]
+  , "stage": ["bar"]
+  }
+}
diff --git a/test/c-from-rust/clib/bar.c b/test/c-from-rust/clib/bar.c
new file mode 100644
index 0000000..5ad792c
--- /dev/null
+++ b/test/c-from-rust/clib/bar.c
@@ -0,0 +1,5 @@
+#include <math.h>
+
+int bar(int x){
+  return sqrt(x);
+}
diff --git a/test/c-from-rust/clib/bar.h b/test/c-from-rust/clib/bar.h
new file mode 100644
index 0000000..1c88e77
--- /dev/null
+++ b/test/c-from-rust/clib/bar.h
@@ -0,0 +1,3 @@
+#pragma once
+
+int bar(int);
diff --git a/test/c-from-rust/clib/foo.c b/test/c-from-rust/clib/foo.c
new file mode 100644
index 0000000..5306a9c
--- /dev/null
+++ b/test/c-from-rust/clib/foo.c
@@ -0,0 +1,5 @@
+#include "bar/bar.h"
+
+int c_func(int x){
+  return bar(x*x);
+}
diff --git a/test/c-from-rust/clib/foo.h b/test/c-from-rust/clib/foo.h
new file mode 100644
index 0000000..6ce2745
--- /dev/null
+++ b/test/c-from-rust/clib/foo.h
@@ -0,0 +1,3 @@
+#pragma once
+int c_func(int);
+
diff --git a/test/c-from-rust/main.rs b/test/c-from-rust/main.rs
new file mode 100644
index 0000000..961150a
--- /dev/null
+++ b/test/c-from-rust/main.rs
@@ -0,0 +1,20 @@
+use std::env;
+
+extern "C" {
+    fn c_func(input: i32) -> i32;
+}
+
+fn c_call(i:i32) -> i32{
+   unsafe {
+    return c_func(i);
+    }
+}
+
+fn main() {
+   let args: Vec<String> = env::args().collect();
+   match args[1].parse::<i32>() {
+   	 Ok(i) =>  println!("Absolute value of {} is {}",i, c_call(i)),
+	 Err(..) => println!("Wrong argument {}",args[1]),
+	 };
+    
+}