xfce4-cpugraph-plugin 0.3.0 fails to link when using -Wl,--as-needed in LDFLAGS. The fix is similar to Bug #2782.
Created attachment 2346 Fix panel-plugin/Makefile.in to link properly This fixes panel-plugin/Makefile.in to link correctly with LDADD instead of LDFLAGS.
Please close this bug because it's fixed by 0.4.0.