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GCC 9
The GNU compiler suite has been update to version 9.0.1. See the http://gcc.gnu.org/gcc-9/changes.html[upstream documentation] for user visible changes. Packages in Fedora have been rebuilt with the new version of the compiler.
Boost 1.69
Boost has been upgraded to version 1.69. See the xref:developers/Development_Boost.adoc[Boost section] for details.
The GNU C Library version 2.29
Fedora 30 provides the GNU C Library - `glibc` - version 2.29. Notable changes include:
New features
The `getcpu` wrapper function has been added, which returns the currently used CPU and NUMA node.
Optimized generic `exp`, `exp2`, `log`, `log2`, `pow`, `sinf`, `cosf`, `sincosf` and `tanf`.
The `reallocarray` function is now declared under `_DEFAULT_SOURCE`, not just for `_GNU_SOURCE`, to match BSD environments.
The `popen` and `system` do not run `atfork` handlers anymore.
`strftime`'s default formatting of a locale's alternative year (`%Ey`) has been changed to zero-pad the year to a minimum of two digits, like `%y`.
As a GNU extension, the `_` and `-` flags can now be applied to `%EY` to control how the year number is formatted; they have the same effect that they would on `%Ey`.
Deprecated and removed features
The `glibc.tune` tunable namespace has been renamed to `glibc.cpu` and the tunable `glibc.tune.cpu` has been renamed to `glibc.cpu.name`.
An archaic GNU extension to `scanf`, under which `%as`, `%aS`, and `%a[...]` meant to scan a string and allocate space for it with `malloc`, is now restricted to programs compiled in C89 or C++98 mode with `_GNU_SOURCE` defined.
Security-related fixes
link:https://nvd.nist.gov/vuln/detail/CVE-2018-19591[CVE-2018-19591]
link:https://nvd.nist.gov/vuln/detail/CVE-2019-6488[CVE-2019-6488]
link:https://nvd.nist.gov/vuln/detail/CVE-2016-10739[CVE-2016-10739]
For detailed information about glibc-2.29 see the link:https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;hb=HEAD[upstream NEWS document]; note that you may need to scroll down to find version 2.29 as the document continues to be updated.

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String updated in the repository
An archaic GNU extension to `scanf`, under which `%as`, `%aS`, and `%a[...]` meant to scan a string and allocate space for it with `malloc`, is now restricted to programs compiled in C89 or C++98 mode with `_GNU_SOURCE` defined.
An archaic GNU extension to `scanf`, under which `%as`, `%aS`, and `%a[...]` meant to scan a string and allocate space for it with `malloc`, is now restricted to programs compiled in C89 or C++98 mode with `_GNU_SOURCE` defined.
a year ago
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Source string description
type: Plain text
Flags
read-only
Source string location
./pages/developers/Development_C.adoc:35
String age
a year ago
Last updated
a year ago
Source string age
a year ago
Translation file
pot/f30/pages/developers/Development_C.pot, string 17