sean Hi Sean,
So far I have not been able to get it to work at all. I'm trying the gem command alone (as is also suggested by the bundle tool), specifying pg-config made no difference, so I also tried --with pg-include=/usr/pgsql-11/include and --with pg-dir=/usr/pgsql-11
In all cases I am getting the same error, that it can't find the libpq-fe.h file. I see it in the /usr/pgsql-11/include directory but have not been able to get the gem tool to see it. Would you have suggestions for anything else I could try?