1 #![allow(non_camel_case_types)]
3 pub use self::FileMatch::*;
8 use std::path::{Path, PathBuf};
10 use session::search_paths::{SearchPath, PathKind};
11 use rustc_fs_util::fix_windows_verbatim_for_gcc;
13 #[derive(Copy, Clone)]
19 // A module for searching for libraries
21 pub struct FileSearch<'a> {
24 search_paths: &'a [SearchPath],
25 tlib_path: &'a SearchPath,
29 impl<'a> FileSearch<'a> {
30 pub fn search_paths(&self) -> impl Iterator<Item = &'a SearchPath> {
32 self.search_paths.iter()
33 .filter(move |sp| sp.kind.matches(kind))
34 .chain(std::iter::once(self.tlib_path))
37 pub fn get_lib_path(&self) -> PathBuf {
38 make_target_lib_path(self.sysroot, self.triple)
41 pub fn search<F>(&self, mut pick: F)
42 where F: FnMut(&Path, PathKind) -> FileMatch
44 for search_path in self.search_paths() {
45 debug!("searching {}", search_path.dir.display());
46 fn is_rlib(p: &Path) -> bool {
47 p.extension() == Some("rlib".as_ref())
49 // Reading metadata out of rlibs is faster, and if we find both
50 // an rlib and a dylib we only read one of the files of
51 // metadata, so in the name of speed, bring all rlib files to
52 // the front of the search list.
53 let files1 = search_path.files.iter().filter(|p| is_rlib(p));
54 let files2 = search_path.files.iter().filter(|p| !is_rlib(p));
55 for path in files1.chain(files2) {
56 debug!("testing {}", path.display());
57 let maybe_picked = pick(path, search_path.kind);
60 debug!("picked {}", path.display());
63 debug!("rejected {}", path.display());
70 pub fn new(sysroot: &'a Path,
72 search_paths: &'a Vec<SearchPath>,
73 tlib_path: &'a SearchPath,
76 debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
86 // Returns just the directories within the search paths.
87 pub fn search_path_dirs(&self) -> Vec<PathBuf> {
89 .map(|sp| sp.dir.to_path_buf())
93 // Returns a list of directories where target-specific tool binaries are located.
94 pub fn get_tools_search_paths(&self) -> Vec<PathBuf> {
95 let mut p = PathBuf::from(self.sysroot);
96 p.push(find_libdir(self.sysroot).as_ref());
104 pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
105 let mut p = PathBuf::from(find_libdir(sysroot).as_ref());
106 assert!(p.is_relative());
107 p.push(RUST_LIB_DIR);
108 p.push(target_triple);
113 pub fn make_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
114 sysroot.join(&relative_target_lib_path(sysroot, target_triple))
117 pub fn get_or_default_sysroot() -> PathBuf {
118 // Follow symlinks. If the resolved path is relative, make it absolute.
119 fn canonicalize(path: Option<PathBuf>) -> Option<PathBuf> {
120 path.and_then(|path| {
121 match fs::canonicalize(&path) {
122 // See comments on this target function, but the gist is that
123 // gcc chokes on verbatim paths which fs::canonicalize generates
124 // so we try to avoid those kinds of paths.
125 Ok(canon) => Some(fix_windows_verbatim_for_gcc(&canon)),
126 Err(e) => bug!("failed to get realpath: {}", e),
131 match env::current_exe() {
133 match canonicalize(Some(exe)) {
134 Some(mut p) => { p.pop(); p.pop(); p },
135 None => bug!("can't determine value for sysroot")
138 Err(ref e) => panic!(format!("failed to get current_exe: {}", e))
142 // The name of the directory rustc expects libraries to be located.
143 fn find_libdir(sysroot: &Path) -> Cow<'static, str> {
144 // FIXME: This is a quick hack to make the rustc binary able to locate
145 // Rust libraries in Linux environments where libraries might be installed
146 // to lib64/lib32. This would be more foolproof by basing the sysroot off
147 // of the directory where librustc is located, rather than where the rustc
149 // If --libdir is set during configuration to the value other than
150 // "lib" (i.e., non-default), this value is used (see issue #16552).
152 #[cfg(target_pointer_width = "64")]
153 const PRIMARY_LIB_DIR: &str = "lib64";
155 #[cfg(target_pointer_width = "32")]
156 const PRIMARY_LIB_DIR: &str = "lib32";
158 const SECONDARY_LIB_DIR: &str = "lib";
160 match option_env!("CFG_LIBDIR_RELATIVE") {
161 Some(libdir) if libdir != "lib" => libdir.into(),
162 _ => if sysroot.join(PRIMARY_LIB_DIR).join(RUST_LIB_DIR).exists() {
163 PRIMARY_LIB_DIR.into()
165 SECONDARY_LIB_DIR.into()
170 // The name of rustc's own place to organize libraries.
171 // Used to be "rustc", now the default is "rustlib"
172 const RUST_LIB_DIR: &str = "rustlib";