The error message was:
/usr/bin/ld: preview_text_filter.o: undefined reference to symbol 'efl_gfx_filter_program_set'
//home/batden/Enlightenment20/efl/src/lib/efl/.libs/libefl.so.1: error adding symbols: DSO missing from command line
LDADD = \
$(top_builddir)/src/lib/eina/libeina.la \
$(top_builddir)/src/lib/eo/libeo.la \
+$(top_builddir)/src/lib/efl/libefl.la \
$(top_builddir)/src/lib/eet/libeet.la \
$(top_builddir)/src/lib/evas/libevas.la \
$(top_builddir)/src/lib/ecore/libecore.la \