1 dataonly=true removes libdir _and prefix_ and prefix cannot be readded (as it's reserved variable),
2 so use absolute datarootdir
3 --- weston-9.0.0/libweston/meson.build.orig 2020-09-15 18:07:36.558978451 +0200
4 +++ weston-9.0.0/libweston/meson.build 2020-09-15 18:07:25.429038747 +0200
6 version: version_weston,
7 description: 'libWeston protocol files',
9 - 'datarootdir=' + join_paths('${prefix}', get_option('datadir')),
10 + 'datarootdir=' + dir_data,
11 'pkgdatadir=' + join_paths('${pc_sysrootdir}${datarootdir}', dir_protocol_libweston)
14 install_dir: dir_data_pc