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rpath.rs
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rpath.rs
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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use driver::session;
use metadata::cstore;
use metadata::filesearch;
use core::util;
use core::hashmap::HashSet;
fn not_win32(os: session::os) -> bool {
match os {
session::os_win32 => false,
_ => true
}
}
pub fn get_rpath_flags(sess: session::Session, out_filename: &Path)
-> ~[~str] {
let os = sess.targ_cfg.os;
// No rpath on windows
if os == session::os_win32 {
return ~[];
}
debug!("preparing the RPATH!");
let sysroot = sess.filesearch.sysroot();
let output = out_filename;
let libs = cstore::get_used_crate_files(sess.cstore);
// We don't currently rpath extern libraries, but we know
// where rustrt is and we know every rust program needs it
let libs = vec::append_one(libs, get_sysroot_absolute_rt_lib(sess));
let rpaths = get_rpaths(os, sysroot, output, libs,
sess.opts.target_triple);
rpaths_to_flags(rpaths)
}
fn get_sysroot_absolute_rt_lib(sess: session::Session) -> Path {
let r = filesearch::relative_target_lib_path(sess.opts.target_triple);
sess.filesearch.sysroot().push_rel(&r).push(os::dll_filename("rustrt"))
}
pub fn rpaths_to_flags(rpaths: &[Path]) -> ~[~str] {
vec::map(rpaths, |rpath| fmt!("-Wl,-rpath,%s",rpath.to_str()))
}
fn get_rpaths(os: session::os,
sysroot: &Path,
output: &Path,
libs: &[Path],
target_triple: &str) -> ~[Path] {
debug!("sysroot: %s", sysroot.to_str());
debug!("output: %s", output.to_str());
debug!("libs:");
for libs.each |libpath| {
debug!(" %s", libpath.to_str());
}
debug!("target_triple: %s", target_triple);
// Use relative paths to the libraries. Binaries can be moved
// as long as they maintain the relative relationship to the
// crates they depend on.
let rel_rpaths = get_rpaths_relative_to_output(os, output, libs);
// Make backup absolute paths to the libraries. Binaries can
// be moved as long as the crates they link against don't move.
let abs_rpaths = get_absolute_rpaths(libs);
// And a final backup rpath to the global library location.
let fallback_rpaths = ~[get_install_prefix_rpath(target_triple)];
fn log_rpaths(desc: &str, rpaths: &[Path]) {
debug!("%s rpaths:", desc);
for rpaths.each |rpath| {
debug!(" %s", rpath.to_str());
}
}
log_rpaths(~"relative", rel_rpaths);
log_rpaths(~"absolute", abs_rpaths);
log_rpaths(~"fallback", fallback_rpaths);
let mut rpaths = rel_rpaths;
rpaths.push_all(abs_rpaths);
rpaths.push_all(fallback_rpaths);
// Remove duplicates
let rpaths = minimize_rpaths(rpaths);
return rpaths;
}
fn get_rpaths_relative_to_output(os: session::os,
output: &Path,
libs: &[Path]) -> ~[Path] {
vec::map(libs, |a| {
get_rpath_relative_to_output(os, output, a)
})
}
pub fn get_rpath_relative_to_output(os: session::os,
output: &Path,
lib: &Path)
-> Path {
use core::os;
assert!(not_win32(os));
// Mac doesn't appear to support $ORIGIN
let prefix = match os {
session::os_android |session::os_linux | session::os_freebsd
=> "$ORIGIN",
session::os_macos => "@executable_path",
session::os_win32 => util::unreachable()
};
Path(prefix).push_rel(&get_relative_to(&os::make_absolute(output),
&os::make_absolute(lib)))
}
// Find the relative path from one file to another
pub fn get_relative_to(abs1: &Path, abs2: &Path) -> Path {
assert!(abs1.is_absolute);
assert!(abs2.is_absolute);
let abs1 = abs1.normalize();
let abs2 = abs2.normalize();
debug!("finding relative path from %s to %s",
abs1.to_str(), abs2.to_str());
let split1: &[~str] = abs1.components;
let split2: &[~str] = abs2.components;
let len1 = split1.len();
let len2 = split2.len();
assert!(len1 > 0);
assert!(len2 > 0);
let max_common_path = uint::min(len1, len2) - 1;
let mut start_idx = 0;
while start_idx < max_common_path
&& split1[start_idx] == split2[start_idx] {
start_idx += 1;
}
let mut path = ~[];
for uint::range(start_idx, len1 - 1) |_i| { path.push(~".."); };
path.push_all(vec::slice(split2, start_idx, len2 - 1));
if !path.is_empty() {
return Path("").push_many(path);
} else {
return Path(".");
}
}
fn get_absolute_rpaths(libs: &[Path]) -> ~[Path] {
vec::map(libs, |a| get_absolute_rpath(a) )
}
pub fn get_absolute_rpath(lib: &Path) -> Path {
os::make_absolute(lib).dir_path()
}
pub fn get_install_prefix_rpath(target_triple: &str) -> Path {
let install_prefix = env!("CFG_PREFIX");
if install_prefix == ~"" {
fail!("rustc compiled without CFG_PREFIX environment variable");
}
let tlib = filesearch::relative_target_lib_path(target_triple);
os::make_absolute(&Path(install_prefix).push_rel(&tlib))
}
pub fn minimize_rpaths(rpaths: &[Path]) -> ~[Path] {
let mut set = HashSet::new();
let mut minimized = ~[];
for rpaths.each |rpath| {
if set.insert(rpath.to_str()) {
minimized.push(copy *rpath);
}
}
minimized
}
#[cfg(unix)]
mod test {
// FIXME(#2119): the outer attribute should be #[cfg(unix, test)], then
// these redundant #[cfg(test)] blocks can be removed
#[cfg(test)]
#[cfg(test)]
use back::rpath::{get_absolute_rpath, get_install_prefix_rpath};
#[cfg(test)]
use back::rpath::{get_relative_to, get_rpath_relative_to_output};
#[cfg(test)]
use back::rpath::{minimize_rpaths, rpaths_to_flags};
#[cfg(test)]
use driver::session;
#[test]
fn test_rpaths_to_flags() {
let flags = rpaths_to_flags(~[Path("path1"),
Path("path2")]);
assert!(flags == ~[~"-Wl,-rpath,path1", ~"-Wl,-rpath,path2"]);
}
#[test]
fn test_prefix_rpath() {
let res = get_install_prefix_rpath("triple");
let d = Path(env!("CFG_PREFIX"))
.push_rel(&Path("lib/rustc/triple/lib"));
debug!("test_prefix_path: %s vs. %s",
res.to_str(),
d.to_str());
assert!(str::ends_with(res.to_str(), d.to_str()));
}
#[test]
fn test_prefix_rpath_abs() {
let res = get_install_prefix_rpath("triple");
assert!(res.is_absolute);
}
#[test]
fn test_minimize1() {
let res = minimize_rpaths([Path("rpath1"),
Path("rpath2"),
Path("rpath1")]);
assert!(res == ~[Path("rpath1"), Path("rpath2")]);
}
#[test]
fn test_minimize2() {
let res = minimize_rpaths(~[Path("1a"), Path("2"), Path("2"),
Path("1a"), Path("4a"),Path("1a"),
Path("2"), Path("3"), Path("4a"),
Path("3")]);
assert!(res == ~[Path("1a"), Path("2"), Path("4a"), Path("3")]);
}
#[test]
fn test_relative_to1() {
let p1 = Path("/usr/bin/rustc");
let p2 = Path("/usr/lib/mylib");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("../lib"));
}
#[test]
fn test_relative_to2() {
let p1 = Path("/usr/bin/rustc");
let p2 = Path("/usr/bin/../lib/mylib");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("../lib"));
}
#[test]
fn test_relative_to3() {
let p1 = Path("/usr/bin/whatever/rustc");
let p2 = Path("/usr/lib/whatever/mylib");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("../../lib/whatever"));
}
#[test]
fn test_relative_to4() {
let p1 = Path("/usr/bin/whatever/../rustc");
let p2 = Path("/usr/lib/whatever/mylib");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("../lib/whatever"));
}
#[test]
fn test_relative_to5() {
let p1 = Path("/usr/bin/whatever/../rustc");
let p2 = Path("/usr/lib/whatever/../mylib");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("../lib"));
}
#[test]
fn test_relative_to6() {
let p1 = Path("/1");
let p2 = Path("/2/3");
let res = get_relative_to(&p1, &p2);
assert!(res == Path("2"));
}
#[test]
fn test_relative_to7() {
let p1 = Path("/1/2");
let p2 = Path("/3");
let res = get_relative_to(&p1, &p2);
assert!(res == Path(".."));
}
#[test]
fn test_relative_to8() {
let p1 = Path("/home/brian/Dev/rust/build/").push_rel(
&Path("stage2/lib/rustc/i686-unknown-linux-gnu/lib/librustc.so"));
let p2 = Path("/home/brian/Dev/rust/build/stage2/bin/..").push_rel(
&Path("lib/rustc/i686-unknown-linux-gnu/lib/libstd.so"));
let res = get_relative_to(&p1, &p2);
debug!("test_relative_tu8: %s vs. %s",
res.to_str(),
Path(".").to_str());
assert!(res == Path("."));
}
#[test]
#[cfg(target_os = "linux")]
#[cfg(target_os = "andorid")]
fn test_rpath_relative() {
let o = session::os_linux;
let res = get_rpath_relative_to_output(o,
&Path("bin/rustc"), &Path("lib/libstd.so"));
assert!(res.to_str() == ~"$ORIGIN/../lib");
}
#[test]
#[cfg(target_os = "freebsd")]
fn test_rpath_relative() {
let o = session::os_freebsd;
let res = get_rpath_relative_to_output(o,
&Path("bin/rustc"), &Path("lib/libstd.so"));
assert!(res.to_str() == ~"$ORIGIN/../lib");
}
#[test]
#[cfg(target_os = "macos")]
fn test_rpath_relative() {
// this is why refinements would be nice
let o = session::os_macos;
let res = get_rpath_relative_to_output(o,
&Path("bin/rustc"),
&Path("lib/libstd.so"));
assert!(res.to_str() == ~"@executable_path/../lib");
}
#[test]
fn test_get_absolute_rpath() {
let res = get_absolute_rpath(&Path("lib/libstd.so"));
debug!("test_get_absolute_rpath: %s vs. %s",
res.to_str(),
os::make_absolute(&Path("lib")).to_str());
assert!(res == os::make_absolute(&Path("lib")));
}
}