rustlings 100 done

exercises/tests/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "tests8"
+version = "0.0.1"
+edition = "2021"
+[[bin]]
+name = "tests8"
+path = "tests8.rs"

exercises/tests/build.rs

@@ -1,7 +1,8 @@
 //! This is the build script for both tests7 and tests8.
 //!
 //! You should modify this file to make both exercises pass.
-
+cargo:rustc-env=TEST_FOO=1;
+cargo:rustc-cfg=pass;
 fn main() {
     // In tests7, we should set up an environment variable
     // called `TEST_FOO`. Print in the standard output to let

exercises/tests/tests7.rs

@@ -34,7 +34,6 @@
 // Execute `rustlings hint tests7` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {}
 

exercises/tests/tests8.rs

@@ -7,7 +7,6 @@
 // Execute `rustlings hint tests8` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {}
 

exercises/tests/tests9.rs

@@ -27,15 +27,15 @@
 //
 // You should NOT modify any existing code except for adding two lines of attributes.
 
-// I AM NOT DONE
-
 extern "Rust" {
     fn my_demo_function(a: u32) -> u32;
+    #[link_name = "my_demo_function"]
     fn my_demo_function_alias(a: u32) -> u32;
 }
 
 mod Foo {
     // No `extern` equals `extern "Rust"`.
+    #[no_mangle]
     fn my_demo_function(a: u32) -> u32 {
         a
     }