1 pub use self::FileMatch::*;
6 use std::path::{Path, PathBuf};
8 use crate::search_paths::{PathKind, SearchPath, SearchPathFile};
9 use rustc_fs_util::fix_windows_verbatim_for_gcc;
12 #[derive(Copy, Clone)]
18 // 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> {
34 .filter(move |sp| sp.kind.matches(kind))
35 .chain(std::iter::once(self.tlib_path))
38 pub fn get_lib_path(&self) -> PathBuf {
39 make_target_lib_path(self.sysroot, self.triple)
42 pub fn get_self_contained_lib_path(&self) -> PathBuf {
43 self.get_lib_path().join("self-contained")
46 pub fn search<F>(&self, mut pick: F)
48 F: FnMut(&SearchPathFile, PathKind) -> FileMatch,
50 for search_path in self.search_paths() {
51 debug!("searching {}", search_path.dir.display());
52 fn is_rlib(spf: &SearchPathFile) -> bool {
53 if let Some(f) = &spf.file_name_str { f.ends_with(".rlib") } else { false }
55 // Reading metadata out of rlibs is faster, and if we find both
56 // an rlib and a dylib we only read one of the files of
57 // metadata, so in the name of speed, bring all rlib files to
58 // the front of the search list.
59 let files1 = search_path.files.iter().filter(|spf| is_rlib(&spf));
60 let files2 = search_path.files.iter().filter(|spf| !is_rlib(&spf));
61 for spf in files1.chain(files2) {
62 debug!("testing {}", spf.path.display());
63 let maybe_picked = pick(spf, search_path.kind);
66 debug!("picked {}", spf.path.display());
69 debug!("rejected {}", spf.path.display());
79 search_paths: &'a [SearchPath],
80 tlib_path: &'a SearchPath,
83 debug!("using sysroot = {}, triple = {}", sysroot.display(), triple);
84 FileSearch { sysroot, triple, search_paths, tlib_path, kind }
87 // Returns just the directories within the search paths.
88 pub fn search_path_dirs(&self) -> Vec<PathBuf> {
89 self.search_paths().map(|sp| sp.dir.to_path_buf()).collect()
92 // Returns a list of directories where target-specific tool binaries are located.
93 pub fn get_tools_search_paths(&self, self_contained: bool) -> Vec<PathBuf> {
94 let mut p = PathBuf::from(self.sysroot);
95 p.push(find_libdir(self.sysroot).as_ref());
99 if self_contained { vec![p.clone(), p.join("self-contained")] } else { vec![p] }
103 pub fn relative_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
104 let mut p = PathBuf::from(find_libdir(sysroot).as_ref());
105 assert!(p.is_relative());
106 p.push(RUST_LIB_DIR);
107 p.push(target_triple);
112 pub fn make_target_lib_path(sysroot: &Path, target_triple: &str) -> PathBuf {
113 sysroot.join(&relative_target_lib_path(sysroot, target_triple))
116 pub fn get_or_default_sysroot() -> PathBuf {
117 // Follow symlinks. If the resolved path is relative, make it absolute.
118 fn canonicalize(path: PathBuf) -> PathBuf {
119 let path = fs::canonicalize(&path).unwrap_or(path);
120 // See comments on this target function, but the gist is that
121 // gcc chokes on verbatim paths which fs::canonicalize generates
122 // so we try to avoid those kinds of paths.
123 fix_windows_verbatim_for_gcc(&path)
126 match env::current_exe() {
128 let mut p = canonicalize(exe);
133 Err(e) => panic!("failed to get current_exe: {}", e),
137 // The name of the directory rustc expects libraries to be located.
138 fn find_libdir(sysroot: &Path) -> Cow<'static, str> {
139 // FIXME: This is a quick hack to make the rustc binary able to locate
140 // Rust libraries in Linux environments where libraries might be installed
141 // to lib64/lib32. This would be more foolproof by basing the sysroot off
142 // of the directory where `librustc_driver` is located, rather than
143 // where the rustc binary is.
144 // If --libdir is set during configuration to the value other than
145 // "lib" (i.e., non-default), this value is used (see issue #16552).
147 #[cfg(target_pointer_width = "64")]
148 const PRIMARY_LIB_DIR: &str = "lib64";
150 #[cfg(target_pointer_width = "32")]
151 const PRIMARY_LIB_DIR: &str = "lib32";
153 const SECONDARY_LIB_DIR: &str = "lib";
155 match option_env!("CFG_LIBDIR_RELATIVE") {
156 None | Some("lib") => {
157 if sysroot.join(PRIMARY_LIB_DIR).join(RUST_LIB_DIR).exists() {
158 PRIMARY_LIB_DIR.into()
160 SECONDARY_LIB_DIR.into()
163 Some(libdir) => libdir.into(),
167 // The name of rustc's own place to organize libraries.
168 // Used to be "rustc", now the default is "rustlib"
169 const RUST_LIB_DIR: &str = "rustlib";