On Wednesday, 3 January 2024 10:07:02 IST Marián Konček wrote:
> Note that mingw-* packages currently in Fedora install into the
> /usr/i686-w64-mingw32/ or /usr/x86_64-w64-mingw32/ directories.
>
> This is a different topic but if each archful package installed its
> files into a directory containing the arch name, it would allow parallel
> installability without configuring dnf and possibly make it more
> convenient for cross-platform development.
This is very similar to Debian's Multiarch, but they have /usr/lib/<arch-tuple> (less pollution of top-level /usr)
Indeed, such organization is ideal for cross-platform development:
- Libraries are installed in the same path, both for native and for cross compilation
- As a result, normal packages in the distribution already have the libraries in the correct locations for both native/cross compilation
- The packaging system (APT) was adapted to allow co-installation of such packages (since the files don't conflict)
- At a later stage, the distribution began shipping complete toolchains for all supported architectures -- built from exactly the same source (same gcc, same binutils, etc.)
- I.e: a developer that need cross-compilation, install the wanted toolchain(s) and all library packages are immediately available from standard repositories.
I guess Fedora people that work on ARM/ARM64/RISC-V would love such a support.
Bye,
--
Oron Peled
> On 2. 1. 2024 16:23, Vít Ondruch wrote:
> >
> >
> > Dne 02. 01. 24 v 13:42 Stephen Smoogen napsal(a):
> >>
> >>
> >> On Tue, 2 Jan 2024 at 06:21, Vít Ondruch <vondruch@xxxxxxxxxx> wrote:
> >>
> >>
> >> Dne 28. 12. 23 v 17:12 Aoife Moloney napsal(a):
> >>> The dynamic linker already has the `glibc-hwcaps` mechanism to load
> >>> optimized implementations of ''shared objects'' [3]. This means that
> >>> packages can provide optimized libraries and they linker will be
> >>> automatically load them from separate directories if appropriate.
> >>> (For AMD64, this is `/usr/lib64/glibc-hwcaps/x86-64-v{2,3,4}/`.)
> >>>
> >>
> >> Is this something specific to x86_64 that the libs needs to be
> >> nested in a place such as
> >> `/usr/lib64/glibc-hwcaps/x86-64-v{2,3,4}/`? Why not use e.g.
> >> `/usr/x86-64-v{2,3,4}/lib` directories instead? Or something more
> >> universal.
> >>
> >>
> >> Adding directories to the /usr sub-space generally gets bogged down
> >> into 'You are polluting my name-space' arguments which get no-where
> >> because some of the people getting angry is having to live with some
> >> 3rd party rules and regulations which stipulated how things look and
> >> will only get updated once a decade or so. [The same goes with
> >> subdirectories in /usr/bin etc where it causes similar problems.]
> >> There tends to be no 'general' case which works unless it gets
> >> 'agreed' upon by some outside of the distro body that publishes
> >> 'versioned' standards.
> >
> >
> > Checking what Debian does, they have paths such as
> > `/usr/lib/x86_64-linux-gnu/`. So we would not be alone.
> >
> >
> > Vít
> >
> >
> >> Vít
> >>
> >> --
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