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| author | Florian Weimer <fweimer@redhat.com> | 2021-01-29 17:26:18 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-01-29 17:43:31 +0100 |
| commit | 570bb42376b0885e34454b22baa005090e0e1ea2 (patch) | |
| tree | 0d7f52e432f779833a7e70ce5b862c98bbbc7bba /NEWS | |
| parent | 04dff6fc0d4ad44fc4491f89fed6574380b78251 (diff) | |
| download | glibc-570bb42376b0885e34454b22baa005090e0e1ea2.tar.gz | |
NEWS: Add entry for glibc-hwcaps and deprecate legacy hwcaps
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -16,6 +16,19 @@ Major new features: * The dynamic linker accepts the --argv0 argument and provides opportunity to change argv[0] string. +* The dynamic linker loads optimized implementations of shared objects + from subdirectories under the glibc-hwcaps directory on the library + search path if the system's capabilities meet the requirements for + that subdirectory. Initially supported subdirectories include + "power9" and "power10" for the powerpc64le-linux-gnu architecture, + "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3", + "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the + subdirectory names correspond to the vendor-independent x86-64 + microarchitecture levels defined in the x86-64 psABI supplement. + +* The new --help option of the dynamic linker provides usage and + information and library search path diagnostics. + * The mallinfo2 function is added to report statistics as per mallinfo, but with larger field widths to accurately report values that are larger than fit in an integer. @@ -63,6 +76,14 @@ Deprecated and removed features, and other changes affecting compatibility: libraries that use this type in their interfaces. The new definition improves consistency with compiler behavior in many scenarios. +* A future version of glibc will stop loading shared objects from the + "tls" subdirectories on the library search path, the subdirectory that + corresponds to the AT_PLATFORM system name, and also stop employing + the legacy AT_HWCAP search mechanism. Applications should switch to + the new glibc-hwcaps mechanism instead; if they do not do that, only + the baseline version (directly from the search path directory) will be + loaded. + Changes to build and runtime requirements: * On Linux, the system administrator needs to configure /dev/pts with |