Must see static libpostgres.a to resolve symbols

The pacman package has that file in libdir though, not pkglibdir.

Author: jcflack

pljava-so/pom.xml

@@ -61,6 +61,7 @@ var ldflags_ex = getPgConfigProperty("--ldflags_ex");
 var includedir = getPgConfigProperty("--includedir");
 var includedir_server = getPgConfigProperty("--includedir-server");
 var bindir = getPgConfigProperty("--bindir");
+var libdir = getPgConfigProperty("--libdir");
 var pkglibdir = getPgConfigProperty("--pkglibdir");
 
 var java_home = java.lang.System.getProperty("java.home");
@@ -268,7 +269,7 @@ var configuration = [
 				l.addAll(files);
 
 				// From compiler-mingw64 profile
-				l.addAll(of("-Bdynamic"));
+				l.addAll(of("-L" + libdir, "-Bdynamic", "-lpostgres"));
 			});
 			linkingProcess.directory(target_path.toFile());
 			return runWindowsCRuntimeCommand(linkingProcess);