1 #![allow(non_camel_case_types)]
3 pub use self::FileMatch::*;
8 use std::path::{Path, PathBuf};
10 use crate::search_paths::{SearchPath, PathKind};
11 use rustc_fs_util::fix_windows_verbatim_for_gcc;
14 #[derive(Copy, Clone)]
20 // A module for searching for libraries
23 pub struct FileSearch<'a> {
26 search_paths: &'a [SearchPath],
27 tlib_path: &'a SearchPath,
31 impl<'a> FileSearch<'a> {
32 pub fn search_paths(&self) -> impl Iterator<Item = &'a SearchPath> {
34 self.search_paths.iter()
35 .filter(move |sp| sp.kind.matches(kind))
36 .chain(std::iter::once(self.tlib_path))
39 pub fn get_lib_path(&self) -> PathBuf {
40 make_target_lib_path(self.sysroot, self.triple)
43 pub fn search<F>(&self, mut pick: F)
44 where F: FnMut(&Path, PathKind) -> FileMatch
46 for search_path in self.search_paths() {
47 debug!("searching {}", search_path.dir.display());
48 fn is_rlib(p: &Path) -> bool {
49 p.extension() == Some("rlib".as_ref())
51 // Reading metadata out of rlibs is faster, and if we find both
52 // an rlib and a dylib we only read one of the files of
53 // metadata, so in the name of speed, bring all rlib files to
54 // the front of the search list.
55 let files1 = search_path.files.iter().filter(|p| is_rlib(p));
56 let files2 = search_path.files.iter().filter(|p| !is_rlib(p));
57 for path in files1.chain(files2) {
58 debug!("testing {}", path.display());
59 let maybe_picked = pick(path, search_path.kind);
62 debug!("picked {}", path.display());
65 debug!("rejected {}", path.display());
72 pub fn new(sysroot: &'a Path,
74 search_paths: &'a Vec<SearchPath>,
75 tlib_path: &'a SearchPath,
78 debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
88 // Returns just the directories within the search paths.
89 pub fn search_path_dirs(&self) -> Vec<PathBuf> {
91 .map(|sp| sp.dir.to_path_buf())
95 // Returns a list of directories where target-specific tool binaries are located.
96 pub fn get_tools_search_paths(&self) -> Vec<PathBuf> {
97 let mut p = PathBuf::from(self.sysroot);
98 p.push(find_libdir(self.sysroot).as_ref());
100 p.push(&self.triple);
106 pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
107 let mut p = PathBuf::from(find_libdir(sysroot).as_ref());
108 assert!(p.is_relative());
109 p.push(RUST_LIB_DIR);
110 p.push(target_triple);
115 pub fn make_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
116 sysroot.join(&relative_target_lib_path(sysroot, target_triple))
119 pub fn get_or_default_sysroot() -> PathBuf {
120 // Follow symlinks. If the resolved path is relative, make it absolute.
121 fn canonicalize(path: Option<PathBuf>) -> Option<PathBuf> {
122 path.and_then(|path| {
123 match fs::canonicalize(&path) {
124 // See comments on this target function, but the gist is that
125 // gcc chokes on verbatim paths which fs::canonicalize generates
126 // so we try to avoid those kinds of paths.
127 Ok(canon) => Some(fix_windows_verbatim_for_gcc(&canon)),
128 Err(e) => panic!("failed to get realpath: {}", e),
133 match env::current_exe() {
135 match canonicalize(Some(exe)) {
136 Some(mut p) => { p.pop(); p.pop(); p },
137 None => panic!("can't determine value for sysroot")
140 Err(ref e) => panic!(format!("failed to get current_exe: {}", e))
144 // The name of the directory rustc expects libraries to be located.
145 fn find_libdir(sysroot: &Path) -> Cow<'static, str> {
146 // FIXME: This is a quick hack to make the rustc binary able to locate
147 // Rust libraries in Linux environments where libraries might be installed
148 // to lib64/lib32. This would be more foolproof by basing the sysroot off
149 // of the directory where librustc is located, rather than where the rustc
151 // If --libdir is set during configuration to the value other than
152 // "lib" (i.e., non-default), this value is used (see issue #16552).
154 #[cfg(target_pointer_width = "64")]
155 const PRIMARY_LIB_DIR: &str = "lib64";
157 #[cfg(target_pointer_width = "32")]
158 const PRIMARY_LIB_DIR: &str = "lib32";
160 const SECONDARY_LIB_DIR: &str = "lib";
162 match option_env!("CFG_LIBDIR_RELATIVE") {
163 Some(libdir) if libdir != "lib" => libdir.into(),
164 _ => if sysroot.join(PRIMARY_LIB_DIR).join(RUST_LIB_DIR).exists() {
165 PRIMARY_LIB_DIR.into()
167 SECONDARY_LIB_DIR.into()
172 // The name of rustc's own place to organize libraries.
173 // Used to be "rustc", now the default is "rustlib"
174 const RUST_LIB_DIR: &str = "rustlib";