diff -Nur qgis-1.8.0/cmake/FindQextserialport.cmake qgis-1.8.0-qextserialport/cmake/FindQextserialport.cmake
--- qgis-1.8.0/cmake/FindQextserialport.cmake	1970-01-01 01:00:00.000000000 +0100
+++ qgis-1.8.0-qextserialport/cmake/FindQextserialport.cmake	2012-11-02 20:40:57.854520284 +0100
@@ -0,0 +1,43 @@
+# Find Qextserialport
+# ~~~~~~~~
+# Copyright (c) 2011, Jürgen E. Fischer <jef at norbit.de>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+# Once run this will define: 
+# 
+# QEXTSERIALPORT_FOUND       = system has Qextserialport lib
+# QEXTSERIALPORT_LIBRARY     = full path to the Qextserialport library
+# QEXTSERIALPORT_INCLUDE_DIR = where to find headers 
+#
+
+
+FIND_PATH(QEXTSERIALPORT_INCLUDE_DIR NAMES qextserialport.h PATHS
+  /usr/include
+  /usr/local/include
+  "$ENV{LIB_DIR}/include" 
+  "$ENV{INCLUDE}" 
+  PATH_SUFFIXES QtExtSerialPort
+  )
+
+FIND_LIBRARY(QEXTSERIALPORT_LIBRARY NAMES qextserialport-1.2 PATHS 
+  /usr/lib
+  /usr/local/lib
+  "$ENV{LIB_DIR}/lib" 
+  "$ENV{LIB}/lib" 
+  )
+
+IF (QEXTSERIALPORT_INCLUDE_DIR AND QEXTSERIALPORT_LIBRARY)
+  SET(QEXTSERIALPORT_FOUND TRUE)
+ENDIF (QEXTSERIALPORT_INCLUDE_DIR AND QEXTSERIALPORT_LIBRARY)
+
+IF (QEXTSERIALPORT_FOUND)
+  IF (NOT QEXTSERIALPORT_FIND_QUIETLY)
+    MESSAGE(STATUS "Found Qextserialport: ${QEXTSERIALPORT_LIBRARY}")
+  ENDIF (NOT QEXTSERIALPORT_FIND_QUIETLY)
+ELSE (QEXTSERIALPORT_FOUND)
+  IF (QEXTSERIALPORT_FIND_REQUIRED)
+    MESSAGE(FATAL_ERROR "Could not find Qextserialport")
+  ENDIF (QEXTSERIALPORT_FIND_REQUIRED)
+ENDIF (QEXTSERIALPORT_FOUND)
diff -Nur qgis-1.8.0/CMakeLists.txt qgis-1.8.0-qextserialport/CMakeLists.txt
--- qgis-1.8.0/CMakeLists.txt	2012-06-12 21:28:18.000000000 +0200
+++ qgis-1.8.0-qextserialport/CMakeLists.txt	2012-11-02 21:04:28.013021635 +0100
@@ -55,6 +55,8 @@
 
 SET (WITH_INTERNAL_QWTPOLAR TRUE CACHE BOOL "Use internal build of QwtPolar")
 
+SET (WITH_INTERNAL_QEXTSERIALPORT TRUE CACHE BOOL "Use internal build of Qextserialport")
+
 SET (WITH_SPATIALITE TRUE CACHE BOOL "Determines whether SPATIALITE support should be built")
 IF (WITH_SPATIALITE)
   SET (WITH_INTERNAL_SPATIALITE FALSE CACHE BOOL "Determines whether SPATIALITE support should be built internally")
@@ -174,6 +176,10 @@
   FIND_PACKAGE(QwtPolar REQUIRED)
 ENDIF(NOT WITH_INTERNAL_QWTPOLAR)
 
+IF (NOT WITH_INTERNAL_QEXTSERIALPORT)
+  FIND_PACKAGE(Qextserialport REQUIRED)
+ENDIF(NOT WITH_INTERNAL_QEXTSERIALPORT)
+
 IF (NOT WITH_INTERNAL_SPATIALITE)
   FIND_PACKAGE(Sqlite3)
   IF (NOT SQLITE3_FOUND)
diff -Nur qgis-1.8.0/python/CMakeLists.txt qgis-1.8.0-qextserialport/python/CMakeLists.txt
--- qgis-1.8.0/python/CMakeLists.txt	2012-06-12 21:28:18.000000000 +0200
+++ qgis-1.8.0-qextserialport/python/CMakeLists.txt	2012-11-02 20:49:38.101851101 +0100
@@ -14,6 +14,16 @@
   )
 ENDIF (WITH_INTERNAL_SPATIALITE)
 
+IF (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ../src/core/gps/qextserialport
+  )
+ELSE (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ${QEXTSERIALPORT_INCLUDE_DIR}
+  )
+ENDIF (WITH_INTERNAL_QEXTSERIALPORT)
+
 SET (CMAKE_RUNTIME_OUTPUT_DIRECTORY ${QGIS_PYTHON_OUTPUT_DIRECTORY})
 SET (CMAKE_LIBRARY_OUTPUT_DIRECTORY ${QGIS_PYTHON_OUTPUT_DIRECTORY})
 
@@ -31,7 +41,6 @@
     ../src/core
     ../src/core/composer
     ../src/core/gps
-    ../src/core/gps/qextserialport
     ../src/core/raster
     ../src/core/renderer
     ../src/core/symbology
diff -Nur qgis-1.8.0/src/app/CMakeLists.txt qgis-1.8.0-qextserialport/src/app/CMakeLists.txt
--- qgis-1.8.0/src/app/CMakeLists.txt	2012-06-12 21:28:18.000000000 +0200
+++ qgis-1.8.0-qextserialport/src/app/CMakeLists.txt	2012-11-02 22:29:40.327221781 +0100
@@ -394,7 +394,7 @@
   ${QT_QTUITOOLS_INCLUDE_DIR}
   ../analysis/raster
   ../core
-  ../core/gps ../core/gps/qextserialport
+  ../core/gps
   ../core/composer ../core/raster ../core/renderer ../core/symbology ../core/symbology-ng
   ../gui ../gui/symbology-ng ../gui/attributetable
   ../plugins
@@ -402,6 +402,17 @@
   gps
   )
 
+IF (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ../core/gps/qextserialport
+  )
+ELSE (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ${QEXTSERIALPORT_INCLUDE_DIR}
+  )
+ENDIF (WITH_INTERNAL_QEXTSERIALPORT)
+
+
 IF (ANDROID)
     INCLUDE_DIRECTORIES(${ANDROID_NDK_TOOLCHAIN_ROOT}/sysroot/usr/include)
 ENDIF (ANDROID)
diff -Nur qgis-1.8.0/src/core/CMakeLists.txt qgis-1.8.0-qextserialport/src/core/CMakeLists.txt
--- qgis-1.8.0/src/core/CMakeLists.txt	2012-06-12 21:28:18.000000000 +0200
+++ qgis-1.8.0-qextserialport/src/core/CMakeLists.txt	2012-11-02 22:21:00.757952769 +0100
@@ -5,9 +5,6 @@
 
 SET(QGIS_CORE_SRCS
 
-  gps/qextserialport/qextserialport.cpp
-  gps/qextserialport/qextserialenumerator.cpp
-
   gps/qgsgpsconnection.cpp
   gps/qgsgpsconnectionregistry.cpp
   gps/qgsnmeaconnection.cpp
@@ -184,10 +181,14 @@
   )
   ADD_DEFINITIONS(-D_TTY_WIN_)
 ELSE(WIN32)
-  SET(QGIS_CORE_SRCS
-    ${QGIS_CORE_SRCS}
-    gps/qextserialport/posix_qextserialport.cpp
-  )
+  IF (WITH_INTERNAL_QEXTSERIALPORT)
+    SET(QGIS_CORE_SRCS
+        ${QGIS_CORE_SRCS}
+        gps/qextserialport/qextserialport.cpp
+        gps/qextserialport/qextserialenumerator.cpp
+        gps/qextserialport/posix_qextserialport.cpp
+    )
+  ENDIF (WITH_INTERNAL_QEXTSERIALPORT)
   ADD_DEFINITIONS(-D_TTY_POSIX_)
 ENDIF(WIN32)
 
@@ -198,6 +199,7 @@
   )
 ENDIF (QT_MOBILITY_LOCATION_FOUND)
 
+
 IF (WITH_INTERNAL_SPATIALITE)
   IF (WIN32 OR APPLE OR ANDROID)
     INCLUDE_DIRECTORIES(${ICONV_INCLUDE_DIR})
@@ -277,10 +279,15 @@
   gps/qgsgpsdetector.h
   gps/qgsnmeaconnection.h
   gps/qgsgpsdconnection.h
-  gps/qextserialport/qextserialport.h
-  gps/qextserialport/qextserialenumerator.h
 )
 
+IF (WITH_INTERNAL_QEXTSERIALPORT)
+  SET(QGIS_CORE_MOC_HDRS
+    ${QGIS_CORE_MOC_HDRS}
+    gps/qextserialport/qextserialport.h
+    gps/qextserialport/qextserialenumerator.h
+  )
+ENDIF (WITH_INTERNAL_QEXTSERIALPORT)
 
 IF (QT_MOBILITY_LOCATION_FOUND)
   SET(QGIS_CORE_MOC_HDRS
@@ -435,6 +442,10 @@
   INCLUDE_DIRECTORIES(${SQLITE3_INCLUDE_DIR})
 ENDIF (NOT WITH_INTERNAL_SPATIALITE)
 
+IF (NOT WITH_INTERNAL_QEXTSERIALPORT)
+    INCLUDE_DIRECTORIES(${QEXTSERIALPORT_INCLUDE_DIR})
+ENDIF (NOT WITH_INTERNAL_QEXTSERIALPORT)
+
 IF (WIN32)
   IF (MSVC)
     ADD_DEFINITIONS("-DCORE_EXPORT=__declspec(dllexport)")
@@ -503,6 +514,10 @@
   ${SPATIALINDEX_LIBRARY}
 )
 
+IF (NOT WITH_INTERNAL_QEXTSERIALPORT)
+  TARGET_LINK_LIBRARIES(qgis_core ${QEXTSERIALPORT_LIBRARY})
+ENDIF (NOT WITH_INTERNAL_QEXTSERIALPORT)
+
 IF (WITH_INTERNAL_SPATIALITE)
   IF (WIN32 OR APPLE)
     TARGET_LINK_LIBRARIES(qgis_core ${ICONV_LIBRARY})
diff -Nur qgis-1.8.0/src/plugins/gps_importer/CMakeLists.txt qgis-1.8.0-qextserialport/src/plugins/gps_importer/CMakeLists.txt
--- qgis-1.8.0/src/plugins/gps_importer/CMakeLists.txt	2012-06-12 21:28:18.000000000 +0200
+++ qgis-1.8.0-qextserialport/src/plugins/gps_importer/CMakeLists.txt	2012-11-02 20:50:24.924541164 +0100
@@ -37,13 +37,23 @@
 INCLUDE_DIRECTORIES(
      ${CMAKE_CURRENT_SOURCE_DIR}
      ${CMAKE_CURRENT_BINARY_DIR}
-     ../../core ../../core/gps ../../core/gps/qextserialport
+     ../../core ../../core/gps
 
      ../../gui
      ..
      ${EXPAT_INCLUDE_DIR}
 )
 
+IF (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ../../core/gps/qextserialport
+  )
+ELSE (WITH_INTERNAL_QEXTSERIALPORT)
+  INCLUDE_DIRECTORIES(
+    ${QEXTSERIALPORT_INCLUDE_DIR}
+  )
+ENDIF (WITH_INTERNAL_QEXTSERIALPORT)
+
 TARGET_LINK_LIBRARIES(gpsimporterplugin
   qgis_core
   qgis_gui