diff -up mmapper-2.1.0-source/CMakeLists.txt.system_qtiocompressor mmapper-2.1.0-source/CMakeLists.txt
--- mmapper-2.1.0-source/CMakeLists.txt.system_qtiocompressor	2010-08-22 23:25:23.000000000 +0300
+++ mmapper-2.1.0-source/CMakeLists.txt	2010-08-23 10:20:30.369359972 +0300
@@ -9,6 +9,18 @@ include(${QT_USE_FILE})
 
 find_package(OpenGL REQUIRED)
 
+# try to find system copy of qtiocompressor
+find_path(QTIOCOMPRESSOR_INCLUDE_DIRS qtiocompressor.h PATH_SUFFIXES QtSolutions)
+find_library(QTIOCOMPRESSOR_LIBRARIES QtSolutions_IOCompressor-2.3)
+if (QTIOCOMPRESSOR_INCLUDE_DIRS AND QTIOCOMPRESSOR_LIBRARIES)
+    message(STATUS "Found QtIOCompressor: ${QTIOCOMPRESSOR_LIBRARIES}")
+else()
+    message(STATUS "QtIOCompressor not found; using bundled copy.")
+    add_subdirectory(src/3rdparty)
+    set(QTIOCOMPRESSOR_INCLUDE_DIRS ${PROJECT_SOURCE_DIR}/src/3rdparty)
+    set(QTIOCOMPRESSOR_LIBRARIES qtiocompressor)
+endif()
+
 if (NOT MINGW)
     find_package(ZLIB REQUIRED)
 else (NOT MINGW)
diff -up mmapper-2.1.0-source/src/3rdparty/CMakeLists.txt.system_qtiocompressor mmapper-2.1.0-source/src/3rdparty/CMakeLists.txt
--- mmapper-2.1.0-source/src/3rdparty/CMakeLists.txt.system_qtiocompressor	2010-08-23 10:19:54.542587698 +0300
+++ mmapper-2.1.0-source/src/3rdparty/CMakeLists.txt	2010-08-23 10:19:54.542587698 +0300
@@ -0,0 +1,14 @@
+set(qtiocompressor_SRCS
+    qtiocompressor.cpp
+)
+
+set(qtiocompressor_MOC_HDRS
+    qtiocompressor.h
+)
+
+QT4_WRAP_CPP(qtiocompressor_MOC_SRCS ${qtiocompressor_MOC_HDRS})
+
+ADD_LIBRARY(qtiocompressor STATIC
+    ${qtiocompressor_SRCS}
+    ${qtiocompressor_MOC_SRCS}
+)
diff -up mmapper-2.1.0-source/src/CMakeLists.txt.system_qtiocompressor mmapper-2.1.0-source/src/CMakeLists.txt
--- mmapper-2.1.0-source/src/CMakeLists.txt.system_qtiocompressor	2010-08-22 23:25:23.000000000 +0300
+++ mmapper-2.1.0-source/src/CMakeLists.txt	2010-08-23 10:19:54.542587698 +0300
@@ -1,6 +1,5 @@
 set(mmapper_SRCS
     main.cpp
-    3rdparty/qtiocompressor.cpp
     configuration/configuration.cpp
     display/connectionselection.cpp
     display/mapcanvas.cpp
@@ -95,7 +94,6 @@ if (APPLE)
  endif (APPLE)
 
 set(mmapper_MOC_HDRS
-    3rdparty/qtiocompressor.h
     display/connectionselection.h
     display/mapcanvas.h
     display/mapwindow.h
@@ -147,7 +145,6 @@ set(mmapper_UIS
 include_directories(
     ${CMAKE_CURRENT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}
-    ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty
     ${CMAKE_CURRENT_SOURCE_DIR}/configuration
     ${CMAKE_CURRENT_SOURCE_DIR}/display
     ${CMAKE_CURRENT_SOURCE_DIR}/expandoracommon
@@ -163,6 +160,7 @@ include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/proxy
     ${OPENGL_INCLUDE_DIR}
     ${ZLIB_INCLUDE_DIR}
+    ${QTIOCOMPRESSOR_INCLUDE_DIRS}
 )
 
 QT4_WRAP_CPP(mmapper_MOC_SRCS ${mmapper_MOC_HDRS})
@@ -187,6 +185,7 @@ target_link_libraries(mmapper
     ${QT_LIBRARIES}
     ${OPENGL_gl_LIBRARY}
     ${ZLIB_LIBRARIES}
+    ${QTIOCOMPRESSOR_LIBRARIES}
 )
 
 # Begin CPack Settings