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NEWS: editorial changes (language, line breaks)
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>
This commit is contained in:
Andreas K. Hüttel
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commit
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1 changed files with 58 additions and 50 deletions
108
NEWS
108
NEWS
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@ -9,22 +9,23 @@ Version 2.41
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Major new features:
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* Support testing glibc build with a different set of C and C++ compilers
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from the C and C++ compilers used to build glibc with
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* Support for testing a glibc build with a different set of C and C++
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compilers from the C and C++ compilers used to build glibc has been
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added:
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$ ../configure TEST_CC="gcc-6.4.1" TEST_CXX="g++-6.4.1"
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And support testing glibc build with Clang
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This includes support for testing the glibc build with Clang, e.g.,
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$ ../configure TEST_CC="clang" TEST_CXX="clang++"
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Some run-time failures with Clang are expected.
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* In /etc/resolv.conf and the RES_OPTIONS, option flags can now be
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prefixed with “-” to clear previously set flags. For example, if
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/etc/resolv.conf contains “options no-aaaa”, a process running with
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the RES_OPTIONS=-no-aaaa environment variable performs AAAA DNS
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queries when the glibc DNS stub resolver is used.
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* In /etc/resolv.conf and the RES_OPTIONS environment variable, option
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flags can now be prefixed with “-” to clear previously set flags.
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For example, if /etc/resolv.conf contains “options no-aaaa”, a
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process running with the RES_OPTIONS=-no-aaaa environment variable
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performs AAAA DNS queries when the glibc DNS stub resolver is used.
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* The DNS stub resolver now supports the strict-error option. If
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activated, getaddrinfo for the AF_UNSPEC address family (with dual
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@ -36,8 +37,9 @@ Major new features:
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which is why this mode is not enabled by default. A future version
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of the library may turn it on by default, however.
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* On Linux, the sched_setattr and sched_getattr have been added, for
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supporting parameterized scheduling policies such as SCHED_DEADLINE.
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* On Linux, the sched_setattr and sched_getattr functions have been
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added, for supporting parameterized scheduling policies such as
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SCHED_DEADLINE.
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* The iconv program now supports converting files in place. The program
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automatically uses a temporary file if required.
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@ -51,64 +53,70 @@ Major new features:
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sinpi, tanpi.
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* The GNU C Library now supports a feature test macro _ISOC2Y_SOURCE to
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enable features from the draft ISO C2Y standard. Only some features from
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this draft standard are supported by the GNU C Library, and as the draft
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is under active development, the set of features enabled by this macro is
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liable to change. Features from C2Y are also enabled by _GNU_SOURCE, or
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by compiling with "gcc -std=gnu2y".
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enable features from the draft ISO C2Y standard. Only some features
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from this draft standard are supported by the GNU C Library, and as
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the draft is under active development, the set of features enabled by
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this macro is liable to change. Features from C2Y are also enabled
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by _GNU_SOURCE, or by compiling with "gcc -std=gnu2y".
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* Optimized and correctly rounded exp10m1f, exp2m1f, expm1f, log10f, log2p1f,
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log1pf, log10p1f, cbrtf, erff, erfcf, lgammaf, tgammaf, tanf, acosf, acoshf,
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asinf, asinhf, atanf, atan2f, atanhf, coshf, sinhf, and tanhf from CORE-MATH
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* Optimized and correctly rounded exp10m1f, exp2m1f, expm1f, log10f,
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log2p1f, log1pf, log10p1f, cbrtf, erff, erfcf, lgammaf, tgammaf,
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tanf, acosf, acoshf, asinf, asinhf, atanf, atan2f, atanhf, coshf,
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sinhf, and tanhf functions have been added from the CORE-MATH
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project <https://core-math.gitlabpages.inria.fr/>.
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* A new tunable, glibc.rtld.execstack, can be used to control whether a
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executable stacks is allowed from the main program, either implicitly due
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to a mising GNU_STACK ELF header or explicit explicitly because of the
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executable bit in GNU_STACK. The default is to allow executable stacks.
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* A new tunable, glibc.rtld.execstack, can be used to control whether an
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executable stack is allowed from the main program, either implicitly
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due to a mising GNU_STACK ELF header or explicit explicitly because
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of the executable bit in GNU_STACK. The default is to allow
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executable stacks.
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* Support for the extensible rseq ABI introduced in the Linux kernel version
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6.3 has been added. The size and alignment of the rseq area is now
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determined by auxiliary vector entries when provided by the running kernel.
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This results in __rseq_size now exposing features past the original ABI
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which currently include 'node_id' and 'mm_cid' and will also allow exposing
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new features as they get added to future Linux kernels.
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* Support for the extensible rseq ABI introduced in the Linux kernel
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version 6.3 has been added. The size and alignment of the rseq area
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is now determined by auxiliary vector entries when provided by the
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running kernel. This results in __rseq_size now exposing features
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past the original ABI which currently include 'node_id' and 'mm_cid'
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and will also allow exposing new features as they get added to future
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Linux kernels.
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* The GNU C Library now supports Guarded Control Stack extension that allows
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to use shadow stacks on AArch64 systems that support this extension.
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Building the library with standard branch protection enabled while using
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a toolchain that supports GCS (binutils 2.44 and GCC 15 or later), will
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enable GCS support in glibc. There is no special configuration flag.
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GCS-enabled glibc is compatible with all existing executables and shared
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libraries and will run with and without GCS support in the system. GCS is
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opt-in and can be controlled at runtime via the glibc.cpu.aarch64_gcs
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tunable, By default GCS is disabled. Linux kernel supports this since 6.13.
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* The GNU C Library now supports the Guarded Control Stack extension
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that allows to use shadow stacks on AArch64 systems that support this
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extension. Building the library with standard branch protection
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enabled while using a toolchain that supports GCS (binutils 2.44 and
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GCC 15 or later) will enable GCS support in glibc. There is no
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special configuration flag. GCS-enabled glibc is compatible with all
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existing executables and shared libraries and will run with and
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without GCS support in the system. GCS is opt-in and can be
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controlled at runtime via the glibc.cpu.aarch64_gcs tunable. By
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default GCS is disabled. Linux kernel supports this since 6.13.
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Deprecated and removed features, and other changes affecting compatibility:
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Deprecated and removed features, and other changes affecting
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compatibility:
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* The big-endian ARC port (arceb-linux-gnu) has been removed.
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* The abort is now async-signal-safe and its implementation makes longjmp
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from the SIGABRT handler always abort if set up with setjmp. Use sigsetjmp
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to keep the old behavior, where the handler does not stop the process
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execution.
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* abort is now async-signal-safe and its implementation makes longjmp
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from the SIGABRT handler always abort if set up with setjmp. Use
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sigsetjmp to keep the old behavior, where the handler does not stop
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the process execution.
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* The nios2*-*-linux-gnu configurations are no longer supported.
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* dlopen and dlmopen no longer make the stack executable if a shared
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library requires it, either implicitly because of a missing GNU_STACK ELF
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header (and default ABI permission having the executable bit set) or
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explicitly because of the executable bit in GNU_STACK, and the stack is
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not already executable. Instead, loading such objects will fail.
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library requires it, either implicitly because of a missing GNU_STACK
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ELF header (and default ABI permission having the executable bit set)
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or explicitly because of the executable bit in GNU_STACK, and the
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stack is not already executable. Instead, loading such objects will
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fail.
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Changes to build and runtime requirements:
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* On recent Linux kernels with vDSO getrandom support, getrandom does not
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act as a "shall occur" cancellation point, in which case it might
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* On recent Linux kernels with vDSO getrandom support, getrandom does
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not act as a "shall occur" cancellation point, in which case it might
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not issue a syscall or trigger a deferred cancellation event.
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* Testing the GNU C Library requires GNU awk to be compiled with support for
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high precision arithmetic via the MPFR library.
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* Testing the GNU C Library requires GNU awk to be compiled with support
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for high precision arithmetic via the MPFR library.
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Security related changes:
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