libsystemd: Include libudev

[jwillikers]

Specify library name and version: libsystemd/*

Include the udev library as a component of the libsystemd package.
Update Meson version.
Add provides = "libudev" to allow other providers of the libudev library, i.e. eudev.
It seems like the provides should be related to the libudev component instead of the entire package.
Is this possible?

I wasn't sure whether to add a separate package for libudev, i.e. something under libudev/all, or to include it as part of the libsystemd package.
In light of the fact that a separate package requires more resources to maintain, I opted for including it in the libsystemd package.
This will require only updating one package in CCI instead of two, at the cost of flexibility for managing libudev and libsystemd in distinct ways, i.e. trying to build one shared and the other static.

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[github-actions]

Hooks produced the following warnings for commit 58e8085

libsystemd/253.6@#0e9ee2ad078aeeb072105d299b038ec3

post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Running objdump on './lib/libudev.so' failed. Is the environment variable OBJDUMP correctly configured?

[AbrilRBS]

It seems like the provides should be related to the libudev component instead of the entire package.
Is this possible?

Not as far as I know, no. I've added this recipe to our next team review meeting, will let you

[jwillikers]

Looks like it is most likely a compiler bug causing the compilation error and not an actual issue with the project. I wonder if it's the version of GCC 9 in CI causing problems.

[jwillikers]

Yep, works with GCC 9.4. I'll add a workaround similar to Qt 6.

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jwillikers]

This PR is necessary for #20358, which requires a newer version of libudev than is available in CI.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 23 (d55b0aa6241ee521f1073ccaf1f611bc91d2c1f9):

• libsystemd/255.7:
  All packages built successfully! (All logs)

• libsystemd/255:
  All packages built successfully! (All logs)

• libsystemd/253.6:
  All packages built successfully! (All logs)

• libsystemd/255.2:
  All packages built successfully! (All logs)

• libsystemd/253.14:
  All packages built successfully! (All logs)

• libsystemd/253.10:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 23 (d55b0aa6241ee521f1073ccaf1f611bc91d2c1f9):

• libsystemd/255.7:
  All packages built successfully! (All logs)

• libsystemd/255.2:
  All packages built successfully! (All logs)

• libsystemd/255:
  All packages built successfully! (All logs)

• libsystemd/253.14:
  All packages built successfully! (All logs)

• libsystemd/253.10:
  All packages built successfully! (All logs)

• libsystemd/253.6:
  All packages built successfully! (All logs)