document fields of Library struct

Author: Be-ing

src/lib.rs

@@ -93,15 +93,26 @@ pub struct Config {
 
 #[derive(Clone, Debug)]
 pub struct Library {
+    /// Libraries specified by -l
     pub libs: Vec<String>,
+    /// Library search paths specified by -L
     pub link_paths: Vec<PathBuf>,
+    /// Library file paths specified without -l
     pub link_files: Vec<PathBuf>,
+    /// Darwin frameworks specified by -framework
     pub frameworks: Vec<String>,
+    /// Darwin framework search paths specified by -F
     pub framework_paths: Vec<PathBuf>,
+    /// C/C++ header include paths specified by -I
     pub include_paths: Vec<PathBuf>,
+    /// Linker options specified by -Wl
     pub ld_args: Vec<Vec<String>>,
+    /// C/C++ definitions specified by -D
     pub defines: HashMap<String, Option<String>>,
+    /// Version specified by .pc file's Version field
     pub version: String,
+    /// Ensure that this struct can only be created via its private `[Library::new]` constructor.
+    /// Users of this crate can only access the struct via `[Config::probe]`.
     _priv: (),
 }