Andre_Mikulec <Andre_Mikulec(at)Hotmail(dot)com> writes:
> Below, I get this error
> In file included from W:/R-3.5._/postgres/src/include/c.h:49,
> from W:/R-3.5._/postgres/src/include/postgres.h:46,
> from example2.c:2:
> W:/R-3.5._/postgres/src/include/postgres_ext.h:26:10: fatal error:
> pg_config_ext.h: No such file or directory
> #include "pg_config_ext.h"
> ^~~~~~~~~~~~~~~~~
> compilation terminated.
It looks like you didn't run configure (or do whatever the Windows
port does to set up the pg_config*.h files).
regards, tom lane