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min_stack_size: clarify both reasons to use dlsym

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Signed-off-by: Anders Kaseorg <andersk@mit.edu>
This commit is contained in:
Anders Kaseorg 2015-03-23 04:02:02 -04:00
parent b6641c1595
commit 737bb30f0a
1 changed files with 6 additions and 5 deletions
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11
src/libstd/sys/unix/thread.rs
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@ -316,11 +316,12 @@ pub fn sleep(dur: Duration) {
// is created in an application with big thread-local storage requirements.
// See #6233 for rationale and details.
//
// Use dlsym to get the symbol value at runtime, for compatibility
// with older versions of glibc. Assumes that we've been dynamically
// linked to libpthread but that is currently always the case. We
// previously used weak linkage (under the same assumption), but that
// caused Debian to detect an unnecessarily strict versioned
// Use dlsym to get the symbol value at runtime, both for
// compatibility with older versions of glibc, and to avoid creating
// dependencies on GLIBC_PRIVATE symbols. Assumes that we've been
// dynamically linked to libpthread but that is currently always the
// case. We previously used weak linkage (under the same assumption),
// but that caused Debian to detect an unnecessarily strict versioned
// dependency on libc6 (#23628).
#[cfg(target_os = "linux")]
fn min_stack_size(attr: *const libc::pthread_attr_t) -> libc::size_t {