diff --git a/ext/pgsql/config.m4 b/ext/pgsql/config.m4
index a5afd02923d8e..f54bf5a822687 100644
--- a/ext/pgsql/config.m4
+++ b/ext/pgsql/config.m4
@@ -1,70 +1,20 @@
 PHP_ARG_WITH([pgsql],
-  [for PostgreSQL support],
-  [AS_HELP_STRING([[--with-pgsql[=DIR]]],
-    [Include PostgreSQL support. DIR is the PostgreSQL base install directory or
-    the path to pg_config])])
+  [whether to build with PostgreSQL support],
+  [AS_HELP_STRING([--with-pgsql],
+    [Build with PostgreSQL support.])])
 
 if test "$PHP_PGSQL" != "no"; then
-  PHP_EXPAND_PATH($PGSQL_INCLUDE, PGSQL_INCLUDE)
+  PKG_CHECK_MODULES([PGSQL], [libpq])
 
-  AC_MSG_CHECKING(for pg_config)
-  for i in $PHP_PGSQL $PHP_PGSQL/bin /usr/local/pgsql/bin /usr/local/bin /usr/bin ""; do
-	if test -x $i/pg_config; then
-      PG_CONFIG="$i/pg_config"
-      break;
-    fi
-  done
+  PHP_EVAL_INCLINE($PGSQL_CFLAGS)
+  PHP_EVAL_LIBLINE($PGSQL_LIBS, PGSQL_SHARED_LIBADD)
 
-  if test -n "$PG_CONFIG"; then
-    AC_MSG_RESULT([$PG_CONFIG])
-    PGSQL_INCLUDE=`$PG_CONFIG --includedir`
-    PGSQL_LIBDIR=`$PG_CONFIG --libdir`
-    if test -r "$PGSQL_INCLUDE/pg_config.h"; then
-      AC_DEFINE(HAVE_PG_CONFIG_H,1,[Whether to have pg_config.h])
-    fi
-  else
-    AC_MSG_RESULT(not found)
-    if test "$PHP_PGSQL" = "yes"; then
-      PGSQL_SEARCH_PATHS="/usr /usr/local /usr/local/pgsql"
-    else
-      PGSQL_SEARCH_PATHS=$PHP_PGSQL
-    fi
+  AC_DEFINE(HAVE_PG_CONFIG_H, 1, [Have pg_config.h])
+  AC_DEFINE(HAVE_PGSQL, 1, [Build with PostgreSQL support])
 
-    for i in $PGSQL_SEARCH_PATHS; do
-      for j in include include/pgsql include/postgres include/postgresql ""; do
-        if test -r "$i/$j/libpq-fe.h"; then
-          PGSQL_INC_BASE=$i
-          PGSQL_INCLUDE=$i/$j
-          if test -r "$i/$j/pg_config.h"; then
-            AC_DEFINE(HAVE_PG_CONFIG_H,1,[Whether to have pg_config.h])
-          fi
-        fi
-      done
-
-      for j in lib $PHP_LIBDIR/pgsql $PHP_LIBDIR/postgres $PHP_LIBDIR/postgresql ""; do
-        if test -f "$i/$j/libpq.so" || test -f "$i/$j/libpq.a"; then
-          PGSQL_LIBDIR=$i/$j
-        fi
-      done
-    done
-  fi
-
-  if test -z "$PGSQL_INCLUDE"; then
-    AC_MSG_ERROR(Cannot find libpq-fe.h. Please specify correct PostgreSQL installation path)
-  fi
-
-  if test -z "$PGSQL_LIBDIR"; then
-    AC_MSG_ERROR(Cannot find libpq.so. Please specify correct PostgreSQL installation path)
-  fi
-
-  if test -z "$PGSQL_INCLUDE" -a -z "$PGSQL_LIBDIR" ; then
-    AC_MSG_ERROR([Unable to find libpq anywhere under $PGSQL_SEARCH_PATHS])
-  fi
-
-  AC_DEFINE(HAVE_PGSQL,1,[Whether to build PostgreSQL support or not])
   old_LIBS=$LIBS
   old_LDFLAGS=$LDFLAGS
-  LDFLAGS="-L$PGSQL_LIBDIR $LDFLAGS"
+  LDFLAGS="$PGSQL_LIBS $LDFLAGS"
   AC_CHECK_LIB(pq, PQescapeString,AC_DEFINE(HAVE_PQESCAPE,1,[PostgreSQL 7.2.0 or later]))
   AC_CHECK_LIB(pq, PQunescapeBytea,AC_DEFINE(HAVE_PQUNESCAPEBYTEA,1,[PostgreSQL 7.3.0 or later]))
   AC_CHECK_LIB(pq, PQsetnonblocking,AC_DEFINE(HAVE_PQSETNONBLOCKING,1,[PostgreSQL 7.0.x or later]))
@@ -98,10 +48,7 @@ if test "$PHP_PGSQL" != "no"; then
   LIBS=$old_LIBS
   LDFLAGS=$old_LDFLAGS
 
-  PHP_ADD_LIBRARY_WITH_PATH(pq, $PGSQL_LIBDIR, PGSQL_SHARED_LIBADD)
   PHP_SUBST(PGSQL_SHARED_LIBADD)
 
-  PHP_ADD_INCLUDE($PGSQL_INCLUDE)
-
   PHP_NEW_EXTENSION(pgsql, pgsql.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
 fi