pkg-config file is broken when CMAKE_INSTALL_LIBDIR is absolute #121
Description
As per title: ebur128/libebur128.pc.cmake has
prefix=@CMAKE_INSTALL_PREFIX@
includedir=${prefix}/include
libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
and so can’t handle an absolute path in CMAKE_INSTALL_LIBDIR. This leads to a broken .pc file on NixOS in particular.
Similar to open-source-parsers/jsoncpp#1199. See “Concatenating paths when building pkg-config files” for a discussion of the problem and a suggested fix (I don’t know CMake myself, sorry).