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Re: glibc independent packages

Hi, again

On Mon, Apr 22, 2013 at 10:46 AM, Kevin Bortis <wermut@gmail.com> wrote:
> Hi,
> Yesterday, I tried to setup a multiarch system with amd64 and the
> recently added architecture musl-linux-amd64 that uses the musl-libc
> instead of the GNU glibc. After setting up a working toolchain, it
> worked well building some packages for the musl-linux-amd64 port. One
> big problem was, that most, if not all packages depend on glibc,
> glibc-dev or libc-dev. I asked myself how this could be solved by not
> introducing a mess in the package control files.
> Because I am relatively new to the packaging topic, the provided
> solutions mentioned in this mail, are probably not thought through. So
> please comment constructively.
> solution 1: Use tag like {misc:libc}, {misc:libc-dev}, {libc:Depends},
> {libc:Dev-Depends}. This would have the advantage, that the debhelper
> script can expand the tag and set the correct port specific values,
> which are maintained in a central location.
> On most architectures {misc:libc-dev} would expand to "libc6-dev |
> libc-dev" and on a musl port to "musl-libc-dev".
> solution 2: Write the depencies directly in the control file, but with
> some wildcard magic.
> Depends: libc6-dev [!*musl*] | libc-dev [!*musl*], musl-libc-dev [*musl*]
> This solution is semi optimal, because it also "hardcodes" the
> depencies. There is also a chance that someone tries to port debian to
> other libc's like dietlibc, uclibc etc.
> solution 3: Create metapackage libc-dev and let glibc-dev,
> musl-libc-dev and possible others provide libc-dev.

Solution 4, based on:
http://lists.debian.org/debian-dpkg/2013/04/msg00020.html [Re: build
profile syntax ideas]

Depends: libc6-dev [libc: dev], libc [libc: Depends]

This would keep the *.dsc file small and readable and only the build
system could eval the correct libc package and version. Hopefully this
would be backward compatible with older build utilities.

> ---
> For local development I created a script that replaces all glibc
> depencies automatically, but in the longer therm this is not a
> solution.


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