configuration issues (with patch)

[thomega]

Using ocaml 4.09.0 from opam version 2.0.5 on debian buster, I had to make two changes.

There's a typo in src/genconfig.sh: it should test for /var/run/postgresql to be a directory instead of a file:

diff --git a/src/genconfig.sh b/src/genconfig.sh
index 9c5f2e0..730eff0 100755
--- a/src/genconfig.sh
+++ b/src/genconfig.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-DIR=`[ -f /var/run/postgresql ] && echo "/var/run/postgresql" || echo "/tmp"`
+DIR=`[ -d /var/run/postgresql ] && echo "/var/run/postgresql" || echo "/tmp"`
 DIR=`echo $DIR | sed "s~/~\\\\\\/~g"`
 
 DEFAULT_PASSWORD=

and here is what I had to change to make test_ppx compile

diff --git a/tests_ppx/test_ppx.ml b/tests_ppx/test_ppx.ml
index 5dd3aec..e80a718 100644
--- a/tests_ppx/test_ppx.ml
+++ b/tests_ppx/test_ppx.ml
@@ -21,15 +21,15 @@ let init_dbh dbh =
   )"]
 
 module Userid: sig
-  type t
+  type t = Int32.t
   val to_string : t -> string
   val from_string : string -> t
   val to_int : t -> int
 end = struct
-  type t = int
-  let to_string = string_of_int
-  let from_string = int_of_string
-  let to_int x = x
+  type t = Int32.t
+  let to_string = Int32.to_string
+  let from_string = Int32.of_string
+  let to_int = Int32.to_int
 end
 
 let employee_exists dbh ?email n =

Finally, the README.md might want to point new users to https://camlspotter.gitlab.io/blog/2019-04-16-pgocaml/