Build fails
Building from git master (d10441fa):
CXX libsystemload_la-systemload.lo
In file included from ../xfce4++/util/fixes.h:36,
from systemload.cc:34:
/usr/local/include/xfce4/libxfce4util/libxfce4util-config.h:23:2: error: #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
23 | #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
| ^~~~~
In file included from ../xfce4++/util/fixes.h:38:
/usr/local/include/xfce4/libxfce4util/xfce-gio-extensions.h:21:2: error: #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
21 | #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
| ^~~~~
In file included from ../xfce4++/util/fixes.h:54:
/usr/local/include/xfce4/libxfce4util/xfce-i18n.h:24:2: error: #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
24 | #error "Only <libxfce4util/libxfce4util.h> can be included directly, this file may disappear or change contents"
| ^~~~~
See also xfce4-cpufreq-plugin#18 (closed).