Re: armelfp: new architecture name for an armel variant
On Thursday 15 July 2010 19:48:43 Aurelien Jarno wrote:
> Note that the new alternative to hwcap is called "multiarch" in the GNU
> libc (something totally different than "multiarch" in Debian). It allows
> to provide different versions of a given symbol using an IFUNC symbol
> type. This will be resolved by the dynamic loader during relocation
> depending on the hardware characteristics.
> This avoid building multiple version of the same software (but still
> multiple versions of a given function), and to introduce more
> granularity (e.g. on x86 SSE, SSE2, SSE3, SSSE4.2, AVX, etc).
So, in essence an application/library can include in the same binary multiple
versions of the same function and the system picks one depending on the
current cpu capabilities? So things like autodetecting SSE/Altivec, etc are
not needed anymore?
> Currently only x86, x86_64, ia64, powerpc and sparc are supported, but
> it should not be difficult to add support for more architectures.
I'm interested in that, is it documented somewhere? ( I know the old hwcap was
not at all, unless one wanted to read half of glibc source code).