Remove unused configuration parameter libdir_relative.

Author: o01eg

src/bootstrap/builder.rs

@@ -357,8 +357,8 @@ impl<'a> Builder<'a> {
 
             fn run(self, builder: &Builder) -> Interned<PathBuf> {
                 let compiler = self.compiler;
-                let lib = if compiler.stage >= 1 && builder.build.config.libdir_relative.is_some() {
-                    builder.build.config.libdir_relative.clone().unwrap()
+                let lib = if compiler.stage >= 1 && builder.build.config.libdir.is_some() {
+                    builder.build.config.libdir.clone().unwrap()
                 } else {
                     PathBuf::from("lib")
                 };

src/bootstrap/compile.rs

@@ -514,7 +514,7 @@ pub fn rustc_cargo(build: &Build,
          .env("CFG_PREFIX", build.config.prefix.clone().unwrap_or_default());
 
     let libdir_relative =
-        build.config.libdir_relative.clone().unwrap_or(PathBuf::from("lib"));
+        build.config.libdir.clone().unwrap_or(PathBuf::from("lib"));
     cargo.env("CFG_LIBDIR_RELATIVE", libdir_relative);
 
     // If we're not building a compiler with debugging information then remove

src/bootstrap/config.rs

@@ -121,7 +121,6 @@ pub struct Config {
     pub docdir: Option<PathBuf>,
     pub bindir: Option<PathBuf>,
     pub libdir: Option<PathBuf>,
-    pub libdir_relative: Option<PathBuf>,
     pub mandir: Option<PathBuf>,
     pub codegen_tests: bool,
     pub nodejs: Option<PathBuf>,
@@ -403,7 +402,6 @@ impl Config {
             config.docdir = install.docdir.clone().map(PathBuf::from);
             config.bindir = install.bindir.clone().map(PathBuf::from);
             config.libdir = install.libdir.clone().map(PathBuf::from);
-            config.libdir_relative = install.libdir.clone().map(PathBuf::from);
             config.mandir = install.mandir.clone().map(PathBuf::from);
         }