[Buildroot] libcec needs to be patched to provide a correct libcec.pc

[Yann E. MORIN <yann.morin.1998@free.fr>]

Bernd, All,

You previously said (on IRC) that  "libcec needs to be patched in order
to provide a correct libcec.pc"

What I saw is that libcec.pc has:
    Libs: -L${libdir} -lcec

Do you mean it should also have -ludev, like:
    Libs: -L${libdir} -lcec -ludev

The issue I see with adding -ludev is:
  - libcec can not be built static, so it is always built as a .so
  - libcec.so has a DT_NEEDED tag on libudev.so.1
  - normally, the linker will follow the DT_NEEDED flags of .so

So, linking a program against -lcec should be enough (unless that
program itself requires -ludev, but then it should specify it, and
that's unrelated to libcec)

Can you elaborate a bit on why and how we should patch libcec.pc,
please?

Regards,
Yann E. MORIN.

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