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Cleanups wrt DYLD_FALLBACK_LIBRARY_PATH handling #6856

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Merged
bors merged 4 commits into from
Apr 17, 2019
Merged

Cleanups wrt DYLD_FALLBACK_LIBRARY_PATH handling #6856

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4a49a79
Remove /lib from DYLD_FALLBACK_LIBRARY_PATH
glandium Apr 16, 2019
03b2087
Use env::var_os("HOME") rather than env::var("HOME")
glandium Apr 16, 2019
165be97
Reset DYLD_FALLBACK_LIBRARY_PATH during run_link_system_path_macos test
glandium Apr 16, 2019
416ed03
Avoid adding DYLD_FALLBACK_LIBRARY_PATH defaults when it is set
glandium Apr 16, 2019
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13 changes: 7 additions & 6 deletions src/cargo/core/compiler/compilation.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -178,16 +178,17 @@ impl<'cfg> Compilation<'cfg> {
search_path
};

search_path.extend(util::dylib_path().into_iter());
if cfg!(target_os = "macos") {
let dylib_path = util::dylib_path();
let dylib_path_is_empty = dylib_path.is_empty();
search_path.extend(dylib_path.into_iter());
if cfg!(target_os = "macos") && dylib_path_is_empty {
// These are the defaults when DYLD_FALLBACK_LIBRARY_PATH isn't
// set. Since Cargo is explicitly setting the value, make sure the
// defaults still work.
if let Ok(home) = env::var("HOME") {
// set or set to an empty string. Since Cargo is explicitly setting
// the value, make sure the defaults still work.
if let Some(home) = env::var_os("HOME") {
search_path.push(PathBuf::from(home).join("lib"));
}
search_path.push(PathBuf::from("/usr/local/lib"));
search_path.push(PathBuf::from("/lib"));
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@ehuss ehuss Apr 16, 2019

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Why remove /lib?

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@glandium glandium Apr 16, 2019

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It's explained in the corresponding commit message. In short, contrary to what the dyld documentation says, it's not in the default, and never has been (and the doc has always been wrong).

search_path.push(PathBuf::from("/usr/lib"));
}
let search_path = join_paths(&search_path, util::dylib_path_envvar())?;
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11 changes: 9 additions & 2 deletions tests/testsuite/run.rs
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Expand Up @@ -1223,6 +1223,13 @@ fn run_link_system_path_macos() {
)
.unwrap();
p.root().rm_rf();
p2.cargo("run").run();
p2.cargo("test").run();
const VAR: &str = "DYLD_FALLBACK_LIBRARY_PATH";
// Reset DYLD_FALLBACK_LIBRARY_PATH so that we don't inherit anything that
// was set by the cargo that invoked the test.
p2.cargo("run").env_remove(VAR).run();
p2.cargo("test").env_remove(VAR).run();
// Ensure this still works when DYLD_FALLBACK_LIBRARY_PATH has
// a value set.
p2.cargo("run").env(VAR, &libdir).run();
p2.cargo("test").env(VAR, &libdir).run();
}