| Message ID | 87pn1nwvo0.fsf@oldenburg.str.redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | NEWS: Add entry for glibc-hwcaps and deprecate legacy hwcaps | expand |
Dear Florian, > +* 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 > + subsdirectory names correspond to the vendor-independent x86-64 subsdirectory -> subdirectory Paul
Ok for 2.33. On 29/01/2021 13:32, Florian Weimer wrote: > --- > NEWS | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/NEWS b/NEWS > index d121f7df87..6521a4f5b7 100644 > --- a/NEWS > +++ b/NEWS > @@ -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 > + subsdirectory 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. Ok. > @@ -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 > Ok.
* Adhemerval Zanella:
> Ok for 2.33.
Thanks, pushed with Paul's typo fix.
Florian
diff --git a/NEWS b/NEWS index d121f7df87..6521a4f5b7 100644 --- a/NEWS +++ b/NEWS @@ -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 + subsdirectory 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