The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/12/libpq-exec.html
Description:
>The OIDs of the built-in data types are defined in the file
include/server/catalog/pg_type_d.h in the install directory.
The location of "pg_type_d.h" is not correct if a user installs the PG from
src and the install directory path didn't contain "postgres"/"pgsql"
according to Makefile as below.
>pkgincludedir = $(includedir)
>ifeq "$(findstring pgsql, $(pkgincludedir))" ""
>ifeq "$(findstring postgres, $(pkgincludedir))" ""
>override pkgincludedir := $(pkgincludedir)/postgresql
My test results are as below, please take it as your reference.
[install Dir contains postgres/pgsql]/include/server/catalog/pg_type_d.h
[install Dir doesn't contain
postgres/pgsql]/include/postgresql/server/catalog/pg_type_d.h