Express dependency on zlib using Requires.private in pkg-config .pc
file instead of adding -lz to the libs.
This will cause the following changes when using TagLib with
pkg-config:
- When using a dynamic library, -lz will no longer be present in
in linker command, but being linked transitively.
- When using a static library, pkg-config must be used with the
--static command line argument, then libs will still contain
-lz, which is needed when linking statically.
- The flags needed for zlib will be provided by pkg-config,
so if -lz is not appropriate (e.g. with MSVC), correct
linker flags will be provided.
cmake supports both absolute and relative to prefix install dirs. #1071
effectively mandated relative paths only. check if install dir is
relative or absolute and either include ${prefix} in pc file or not
Fixes#1098
Urs FleischandGitHub
Jan PalusandGitHub
dabrain34andGitHub
Andreas SturmlechnerandUrs Fleisch
Scott Wheeler
Yannick Inizan
Stefan Saraev
Lukáš Lalinský
Laurent Montel