Current Status

make and install

	PG9.5+Ruby1.8	PG9.5+Ruby2.2	PG9.6+Ruby2.3
make	OK	OK, but many warnings	OK
make install	OK	OK	OK

Test

	PG9.5+Ruby1.8	PG9.5+Ruby2.2	PG9.6+Ruby2.3
conv_bitstring	OK	OK
conv_geometry	OK(*1)	OK(*1)
conv_network	OK	OK
plp	OK	OK
plt	OK	OK
range	?(*2)	?(*2)

*1 surround yield arguments with '[]' for these tests

*2 They differ from test.expected.84, but the output seems to be correct.