1 #![allow(non_camel_case_types)]
3 pub use self::FileMatch
::*;
8 use std
::path
::{Path, PathBuf}
;
10 use crate::search_paths
::{PathKind, SearchPath, SearchPathFile}
;
12 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
> {
36 .filter(move |sp
| sp
.kind
.matches(kind
))
37 .chain(std
::iter
::once(self.tlib_path
))
40 pub fn get_lib_path(&self) -> PathBuf
{
41 make_target_lib_path(self.sysroot
, self.triple
)
44 pub fn search
<F
>(&self, mut pick
: F
)
46 F
: FnMut(&SearchPathFile
, PathKind
) -> FileMatch
,
48 for search_path
in self.search_paths() {
49 debug
!("searching {}", search_path
.dir
.display());
50 fn is_rlib(spf
: &SearchPathFile
) -> bool
{
51 if let Some(f
) = &spf
.file_name_str { f.ends_with(".rlib") }
else { false }
53 // Reading metadata out of rlibs is faster, and if we find both
54 // an rlib and a dylib we only read one of the files of
55 // metadata, so in the name of speed, bring all rlib files to
56 // the front of the search list.
57 let files1
= search_path
.files
.iter().filter(|spf
| is_rlib(&spf
));
58 let files2
= search_path
.files
.iter().filter(|spf
| !is_rlib(&spf
));
59 for spf
in files1
.chain(files2
) {
60 debug
!("testing {}", spf
.path
.display());
61 let maybe_picked
= pick(spf
, search_path
.kind
);
64 debug
!("picked {}", spf
.path
.display());
67 debug
!("rejected {}", spf
.path
.display());
77 search_paths
: &'a Vec
<SearchPath
>,
78 tlib_path
: &'a SearchPath
,
81 debug
!("using sysroot = {}, triple = {}", sysroot
.display(), triple
);
82 FileSearch { sysroot, triple, search_paths, tlib_path, kind }
85 // Returns just the directories within the search paths.
86 pub fn search_path_dirs(&self) -> Vec
<PathBuf
> {
87 self.search_paths().map(|sp
| sp
.dir
.to_path_buf()).collect()
90 // Returns a list of directories where target-specific tool binaries are located.
91 pub fn get_tools_search_paths(&self) -> Vec
<PathBuf
> {
92 let mut p
= PathBuf
::from(self.sysroot
);
93 p
.push(find_libdir(self.sysroot
).as_ref());
101 pub fn relative_target_lib_path(sysroot
: &Path
, target_triple
: &str) -> PathBuf
{
102 let mut p
= PathBuf
::from(find_libdir(sysroot
).as_ref());
103 assert
!(p
.is_relative());
104 p
.push(RUST_LIB_DIR
);
105 p
.push(target_triple
);
110 pub fn make_target_lib_path(sysroot
: &Path
, target_triple
: &str) -> PathBuf
{
111 sysroot
.join(&relative_target_lib_path(sysroot
, target_triple
))
114 pub fn get_or_default_sysroot() -> PathBuf
{
115 // Follow symlinks. If the resolved path is relative, make it absolute.
116 fn canonicalize(path
: Option
<PathBuf
>) -> Option
<PathBuf
> {
117 path
.and_then(|path
| {
118 match fs
::canonicalize(&path
) {
119 // See comments on this target function, but the gist is that
120 // gcc chokes on verbatim paths which fs::canonicalize generates
121 // so we try to avoid those kinds of paths.
122 Ok(canon
) => Some(fix_windows_verbatim_for_gcc(&canon
)),
123 Err(e
) => panic
!("failed to get realpath: {}", e
),
128 match env
::current_exe() {
129 Ok(exe
) => match canonicalize(Some(exe
)) {
135 None
=> panic
!("can't determine value for sysroot"),
137 Err(ref e
) => panic
!(format
!("failed to get current_exe: {}", e
)),
141 // The name of the directory rustc expects libraries to be located.
142 fn find_libdir(sysroot
: &Path
) -> Cow
<'
static, str> {
143 // FIXME: This is a quick hack to make the rustc binary able to locate
144 // Rust libraries in Linux environments where libraries might be installed
145 // to lib64/lib32. This would be more foolproof by basing the sysroot off
146 // of the directory where `librustc_driver` is located, rather than
147 // where the rustc binary is.
148 // If --libdir is set during configuration to the value other than
149 // "lib" (i.e., non-default), this value is used (see issue #16552).
151 #[cfg(target_pointer_width = "64")]
152 const PRIMARY_LIB_DIR
: &str = "lib64";
154 #[cfg(target_pointer_width = "32")]
155 const PRIMARY_LIB_DIR
: &str = "lib32";
157 const SECONDARY_LIB_DIR
: &str = "lib";
159 match option_env
!("CFG_LIBDIR_RELATIVE") {
160 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()
171 // The name of rustc's own place to organize libraries.
172 // Used to be "rustc", now the default is "rustlib"
173 const RUST_LIB_DIR
: &str = "rustlib";