C
GCC 9
The GNU compiler suite has been update to version 9.0.1. See the 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 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
andtanf
. -
The
reallocarray
function is now declared under_DEFAULT_SOURCE
, not just for_GNU_SOURCE
, to match BSD environments. -
The
popen
andsystem
do not runatfork
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 toglibc.cpu
and the tunableglibc.tune.cpu
has been renamed toglibc.cpu.name
. -
An archaic GNU extension to
scanf
, under which%as
,%aS
, and%a[…]
meant to scan a string and allocate space for it withmalloc
, is now restricted to programs compiled in C89 or C++98 mode with_GNU_SOURCE
defined. *
Security-related fixes
For detailed information about glibc-2.29 see the 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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