Readd pg_config --pgxs code.

doc/src/sgml/ref/pg_config-ref.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/pg_config-ref.sgml,v 1.17 2003/11/29 19:51:39 pgsql Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/pg_config-ref.sgml,v 1.18 2004/08/02 12:34:14 momjian Exp $ -->
 
 <refentry id="app-pgconfig">
  <refmeta>
@@ -25,6 +25,7 @@
     <arg>--includedir-server</arg>
     <arg>--libdir</arg>
     <arg>--pkglibdir</arg>
+    <arg>--pgxs</arg>
     <arg>--configure</arg>
     <arg>--version</arg>
    </group>
@@ -100,6 +101,15 @@
      </listitem>
     </varlistentry>
 
+    <varlistentry>
+     <term><option>--pgxs</option></>
+     <listitem>
+      <para>
+       Print the location of extension makefiles.
+     </para>
+     </listitem>
+    </varlistentry>
+
     <varlistentry>
      <term><option>--configure</option></>
      <listitem>

src/bin/pg_config/pg_config.c

@@ -17,7 +17,7 @@
  *
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/bin/pg_config/pg_config.c,v 1.2 2004/08/01 14:01:36 momjian Exp $
+ * $PostgreSQL: pgsql/src/bin/pg_config/pg_config.c,v 1.3 2004/08/02 12:34:14 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -43,6 +43,7 @@ help()
 	printf(_("  --includedir-server   show location of C header files for the server\n"));
 	printf(_("  --libdir              show location of object code libraries\n"));
 	printf(_("  --pkglibdir           show location of dynamically loadable modules\n"));
+	printf(_("  --pgxs                show location of extension makefile\n"));
 	printf(_("  --configure           show options given to 'configure' script when\n"));
 	printf(_("                        PostgreSQL was built\n"));
 	printf(_("  --version             show the PostgreSQL version, then exit\n"));
@@ -81,6 +82,7 @@ main (int argc, char ** argv)
 			strcmp(argv[i],"--includedir-server") == 0 ||
 			strcmp(argv[i],"--libdir") == 0 ||
 			strcmp(argv[i],"--pkglibdir") == 0 ||
+			strcmp(argv[i],"--pgxs") == 0 ||
 			strcmp(argv[i],"--configure") == 0)
 		{
 			/* come back to these later */
@@ -136,6 +138,11 @@ main (int argc, char ** argv)
 			get_lib_path(mypath,otherpath);
 		else if (strcmp(argv[i],"--pkglibdir") == 0)
 			get_pkglib_path(mypath,otherpath);
+		else if (strcmp(argv[i],"--pgxs") == 0)
+		{
+			get_pkglib_path(mypath,otherpath);
+			strncat(otherpath, "/pgxs", MAXPGPATH-1);
+		}
 
 		printf("%s\n",otherpath);
 	}