Herramientas de desarrollo
Comp-NeuroFedora lab
Se ha añadido a la suite un nuevo laboratorio llamado Comp-NeuroFedora. Este cambio proporciona una imagen de laboratorio preempaquetada y lista para instalar con software libre y de código abierto (FOSS) para optimizar el trabajo en neurociencia computacional. El cambio también busca animar a más usuarios a usar Fedora en sus proyectos científicos.
For more information about Comp-NeuroFedora, see the upstream documentation.
For a list of Fedora labs, see the Functional bundles for Fedora page.
Switch mingw32 toolchain to dwarf-2 exceptions
The mingw32
toolchain in Fedora 32 uses the dwarf-2
exception model instead of the previously used SJLJ
. Notable differences include:
-
SJLJ
(setjmp
/longjmp
):-
Not "zero-cost": even if an exception isn’t thrown, it incurs a minor performance penalty (~15% in exception heavy code).
-
Allows exceptions to traverse through e.g. windows callbacks.
-
-
DWARF
(DW2
,dwarf-2
)-
No permanent runtime overhead.
-
needs whole call stack to be
dwarf
-enabled, which means exceptions cannot be thrown over e.g. Windows system DLLs (i.e. throwing an exception in a system DLL callback and attempting to catch it won’t work) -
DW2 potentially generates bigger libraries. The overhead however is not big (< 10%) for typical applications.
-
The main reason for switching to dwarf-2
is that Rust can only be compiled to a MinGW toolchain targeting dwarf exceptions on 32-bit, and Rust usage is starting to appear in some packages (i.e. librsvg2
). Switching to dwarf-2
on mingw32
would hence allow to keep the same consistent package offering between mingw32
and mingw64
, whereas otherwise one would need to either freeze the mingw32
variants at older versions, or remove them altogether.
PostgreSQL has been updated to version 12 in the non-modular builds
PostgreSQL postgresql
and libpq
components have been updated in Fedora 32 from 11 to 12 version in the non-modular main builds.
For a complete list of enhancements, see PostgreSQL Release 12
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