cmake: Set CMAKE_INSTALL_LIBDIR explicitly

CMake and Meson may disagree on the default value of the libdir
installation path. This results in shared libraries installed in the
default location not assigned to the {libdir_shared} install location
by the Meson CMake interpreter. This results in wrong install plan
metadata and in those libraries being installed in the wrong location.

Author: dnicolodi

mesonbuild/cmake/interpreter.py

@@ -842,6 +842,8 @@ def configure(self, extra_cmake_options: T.List[str]) -> CMakeExecutor:
         cmake_args = []
         cmake_args += cmake_get_generator_args(self.env)
         cmake_args += [f'-DCMAKE_INSTALL_PREFIX={self.install_prefix}']
+        libdir = self.env.coredata.optstore.get_value_for(OptionKey('libdir'))
+        cmake_args += [f'-DCMAKE_INSTALL_LIBDIR={libdir}']
         cmake_args += extra_cmake_options
         if not any(arg.startswith('-DCMAKE_BUILD_TYPE=') for arg in cmake_args):
             # Our build type is favored over any CMAKE_BUILD_TYPE environment variable