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diff --git a/m4/ct_check_postgres_db.m4 b/m4/ct_check_postgres_db.m4
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+dnl @synopsis CT_CHECK_POSTGRES_DB
+dnl
+dnl This macro tries to find the headers and librarys for the
+dnl PostgreSQL database to build client applications.
+dnl
+dnl If includes are found, the variable PQINCPATH will be set. If
+dnl librarys are found, the variable PQLIBPATH will be set. if no check
+dnl was successful, the script exits with a error message.
+dnl
+dnl @category InstalledPackages
+dnl @author Christian Toepp <c.toepp@gmail.com>
+dnl @version 2005-12-30
+dnl @license AllPermissive
+
+AC_DEFUN([CT_CHECK_POSTGRES_DB], [
+
+AC_ARG_WITH(pgsql,
+	[  --with-pgsql=PREFIX		Prefix of your PostgreSQL installation],
+	[pg_prefix=$withval], [pg_prefix=])
+AC_ARG_WITH(pgsql-inc,
+	[  --with-pgsql-inc=PATH		Path to the include directory of PostgreSQL],
+	[pg_inc=$withval], [pg_inc=])
+AC_ARG_WITH(pgsql-lib,
+	[  --with-pgsql-lib=PATH		Path to the librarys of PostgreSQL],
+	[pg_lib=$withval], [pg_lib=])
+
+
+AC_SUBST(PQINCPATH)
+AC_SUBST(PQLIBPATH)
+
+if test "$pg_prefix" != ""; then
+   AC_MSG_CHECKING([for PostgreSQL includes in $pg_prefix/include])
+   if test -f "$pg_prefix/include/libpq-fe.h" ; then
+      PQINCPATH="-I$pg_prefix/include"
+      AC_MSG_RESULT([yes])
+   else
+      AC_MSG_ERROR(libpq-fe.h not found)
+   fi
+   AC_MSG_CHECKING([for PostgreSQL librarys in $pg_prefix/lib])
+   if test -f "$pg_prefix/lib/libpq.so" ; then
+      PQLIBPATH="-L$pg_prefix/lib"
+      AC_MSG_RESULT([yes])
+   else
+      AC_MSG_ERROR(libpq.so not found)
+   fi
+else
+  if test "$pg_inc" != ""; then
+    AC_MSG_CHECKING([for PostgreSQL includes in $pg_inc])
+    if test -f "$pg_inc/libpq-fe.h" ; then
+      PQINCPATH="-I$pg_inc"
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_ERROR(libpq-fe.h not found)
+    fi
+  fi
+  if test "$pg_lib" != ""; then
+    AC_MSG_CHECKING([for PostgreSQL librarys in $pg_lib])
+    if test -f "$pg_lib/libpq.so" ; then
+      PQLIBPATH="-L$pg_lib"
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_ERROR(libpq.so not found)
+    fi
+  fi
+fi
+
+if test "$PQINCPATH" = "" ; then
+  AC_CHECK_HEADER([postgresql/libpq-fe.h], [], AC_MSG_ERROR(libpq-fe.h not found))
+fi
+if test "$PQLIBPATH" = "" ; then
+  AC_CHECK_LIB(pq, PQconnectdb, [], AC_MSG_ERROR(libpq.so not found))
+fi
+
+])