When `audacity_conan_allow_prebuilt_binaries` is turned on,
the dependecies that are managed by Conan
will be built from the source code every time
cmake configuartion changes
1. We put all shared libraries into one place. Both conan and locally built
2. We invoke CopyLibs to copy the libraries to a proper location and to correctly set the RPATH
Fixes CopyLibs script on Windows
Fixes CopyLibs.cmake for Linux
Fixes CopyLibs on macOS
Fixes CopyLibs on macOS
add_conan_lib cmake function is defined, that allows to add a dependency using Conan with two possible system fallbacks:
1. pkg_check_modules is invoked, if `PGK_CONFIG ...` is present
2. find_package is invoked if `FIND_PACKAGE_OPTIONS` is present and `pkg_check_modules` has failed
If `ALWAYS_ALLOW_CONAN_FALLBACK` is present - `obey_system_dependencies` will be ignored for the package
Currently, the following dependencies are retrieved using Conan:
* zlib
* expat
* wxwidgets
* libmp3lame
* libid3tag
* libmad
The last three libraries are included in this commit, as they depend on zlib.
Properly pass **arch** and **os.version** to Conan
