adapt for mknemo unsio from NEMO project

CMakeLists.txt

@@ -53,6 +53,9 @@ MESSAGE( STATUS "core OPT  =" ${OPT} )
 MESSAGE( STATUS "OSX detected =" ${OSX} )
 MESSAGE( STATUS "BUILD_TYPE =" ${RELEASE} )
 
+# Detect NEMO
+FIND_PACKAGE(NEMO)
+
 FIND_PACKAGE(SQLITE3)
 if (APPLE)
 #set (HDF5_USE_STATIC_LIBRARIES TRUE)
@@ -255,17 +258,18 @@ INSTALL(FILES  ${UNSIO2_SOURCE_DIR}/man/man3/unsiof.3 DESTINATION ${PREFIX_MAN}/
 #INSTALL(FILES  ${NEMOLIB}/libnemo.a DESTINATION ${PREFIX_LIB})
 INSTALL(FILES  ${NEMOLIB}/libnemomaing77.a DESTINATION ${PREFIX_LIB})
 
-# Find all NEMOLIGHT header files
-FILE(GLOB nlight_files ${NEMOLIGHT}/src/*.h ${NEMOLIGHT}/src/inc/*.h)
-FOREACH(source_header ${nlight_files})
-  INSTALL(FILES  ${source_header} DESTINATION ${PREFIX_INC}/nemo)
-ENDFOREACH()
-
-FILE(GLOB nlight_files ${NEMOLIGHT}/src/inc/snapshot/*.c ${NEMOLIGHT}/src/inc/snapshot/*.h)
-FOREACH(source_header ${nlight_files})
-  INSTALL(FILES  ${source_header} DESTINATION ${PREFIX_INC}/nemo/snapshot)
-ENDFOREACH()
-
+IF (NOT NEMO_INSTALLED)
+  # Find all NEMOLIGHT header files
+	FILE(GLOB nlight_files ${NEMOLIGHT}/src/*.h ${NEMOLIGHT}/src/inc/*.h)
+	FOREACH(source_header ${nlight_files})
+		INSTALL(FILES  ${source_header} DESTINATION ${PREFIX_INC}/nemo)
+	ENDFOREACH()
+
+	FILE(GLOB nlight_files ${NEMOLIGHT}/src/inc/snapshot/*.c ${NEMOLIGHT}/src/inc/snapshot/*.h)
+	FOREACH(source_header ${nlight_files})
+		INSTALL(FILES  ${source_header} DESTINATION ${PREFIX_INC}/nemo/snapshot)
+	ENDFOREACH()
+ENDIF (NOT NEMO_INSTALLED)
 
 
 if (NOT CMAKE_INSTALL_PREFIX STREQUAL "/usr")