Use configure_file() instead of custom_target(). This resolves the
following warning:
WARNING: Source item '/home/user/ModemManager/header-generator.xsl'
cannot be converted to File object, because it is a generated file. This
will become a hard error in the future.
meson is a build system focused on speed an ease of use, which
helps speeding up the software development. This patch adds meson
support along autotools.
Yegor Yefremov
Iñigo Martínez