codebrainz commented on this pull request.
-DGEANYPY_PYTHON_DIR="\"$(libdir)/geany/geanypy\"" \
-DGEANYPY_PLUGIN_DIR=""$(libdir)/geany"" \ -DG_LOG_DOMAIN="GeanyPy" -geanypy_la_CFLAGS = @GEANYPY_CFLAGS@ @GMODULE_CFLAGS@ +geanypy_la_CFLAGS = @PYGTK_CFLAGS@ @GEANY_CFLAGS@ @GEANYPY_CFLAGS@ @GMODULE_CFLAGS@
I guess as long as user environment `CPPFLAGS` override `CPPFLAGS` and likewise but after with `CFLAGS` it doesn't matter.