fix building w/o assimp

cmakemodules/script_assimp.cmake

@@ -15,32 +15,32 @@ find_package(PkgConfig QUIET)
 IF(PKG_CONFIG_FOUND)
 	PKG_CHECK_MODULES(ASSIMP ${_QUIET} assimp)
 	IF (ASSIMP_FOUND)
-		IF ($ENV{VERBOSE})	
+		IF ($ENV{VERBOSE})
 			MESSAGE(STATUS "Assimp: Found via pkg-config")
 			MESSAGE(STATUS " ASSIMP_LIBRARIES=${ASSIMP_LIBRARIES}")
 			MESSAGE(STATUS " ASSIMP_INCLUDE_DIRS=${ASSIMP_INCLUDE_DIRS}")
 		ENDIF ($ENV{VERBOSE})
-		
+
 		SET(CMAKE_MRPT_HAS_ASSIMP 1)
 		SET(CMAKE_MRPT_HAS_ASSIMP_SYSTEM 1)
 
 		SET(ASSIMP_CXX_FLAGS ${ASSIMP_CFLAGS})
 	ENDIF (ASSIMP_FOUND)
 ENDIF(PKG_CONFIG_FOUND)
 
-IF (NOT ASSIMP_FOUND)
+IF (NOT ASSIMP_FOUND AND EXISTS "${MRPT_SOURCE_DIR}/otherlibs/assimp/")
 	SET(BUILD_ASSIMP ON CACHE BOOL "Build an embedded version of Assimp (3D models importer)")
 	IF (BUILD_ASSIMP)
 
 		# Use embedded version:
 		# --------------------------
 		# Tune cmake vars for assimp build for mrpt:
-		SET (ASSIMP_BUILD_ASSIMP_TOOLS OFF CACHE BOOL "If the supplementary tools for Assimp are built in addition to the library." FORCE)	
+		SET (ASSIMP_BUILD_ASSIMP_TOOLS OFF CACHE BOOL "If the supplementary tools for Assimp are built in addition to the library." FORCE)
 		SET (ASSIMP_BUILD_SAMPLES OFF CACHE BOOL "If the official samples are built as well (needs Glut)." FORCE)
 		SET (ASSIMP_BUILD_STATIC_LIB ON CACHE BOOL "Build Assimp static." FORCE)
 		SET (ASSIMP_BUILD_TESTS OFF CACHE BOOL "." FORCE)
 		set(ASSIMP_LIBRARY_SUFFIX "-mrpt" CACHE STRING "Suffix to append to library names" FORCE)
-		
+
 		add_subdirectory("${MRPT_SOURCE_DIR}/otherlibs/assimp/")
 		if(ENABLE_SOLUTION_FOLDERS)
 			set_target_properties(assimp PROPERTIES FOLDER "3rd party")
@@ -54,7 +54,7 @@ IF (NOT ASSIMP_FOUND)
 			AMD64
 			ASM686
 			ASSIMP_BIN_INSTALL_DIR
-			ASSIMP_BUILD_STATIC_LIB 
+			ASSIMP_BUILD_STATIC_LIB
 			ASSIMP_DEBUG_POSTFIX
 			ASSIMP_ENABLE_BOOST_WORKAROUND
 			ASSIMP_NO_EXPORT
@@ -66,25 +66,25 @@ IF (NOT ASSIMP_FOUND)
 			ASSIMP_PACKAGE_VERSION
 			ASSIMP_LIBRARY_SUFFIX
 			)
-			
+
 
 		# 2nd attempt: via cmake
 		SET(ASSIMP_DIR "${EMBEDDED_ASSIMP_DIR}" CACHE PATH "Path to ASSIMP CMake config file" FORCE)
 		FIND_PACKAGE(ASSIMP QUIET)
-		
+
 		SET(ASSIMP_FOUND_VIA_CMAKE 1)
-		
+
 		SET(CMAKE_MRPT_HAS_ASSIMP 1)
 		SET(CMAKE_MRPT_HAS_ASSIMP_SYSTEM 0)
-		
+
 		# Override binary output dir:
-		SET_TARGET_PROPERTIES(assimp PROPERTIES 
+		SET_TARGET_PROPERTIES(assimp PROPERTIES
 			ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib/"
 			RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/"
 			)
-		
+
 	ENDIF (BUILD_ASSIMP)
-ENDIF(NOT ASSIMP_FOUND)
+ENDIF()
 
 IF (ASSIMP_FOUND_VIA_CMAKE)
 	# override wrong target libs in -config.cmake file:
@@ -110,7 +110,7 @@ IF (CMAKE_MRPT_HAS_ASSIMP)
 		LINK_DIRECTORIES("${ASSIMP_LIBRARY_DIRS}")
 	ENDIF(NOT ${ASSIMP_LIBRARY_DIRS} STREQUAL "")
 
-	IF ($ENV{VERBOSE})	
+	IF ($ENV{VERBOSE})
 		MESSAGE(STATUS "Assimp:")
 		MESSAGE(STATUS " ASSIMP_INCLUDE_DIRS: ${ASSIMP_INCLUDE_DIRS}")
 		MESSAGE(STATUS " ASSIMP_CXX_FLAGS: ${ASSIMP_CXX_FLAGS}")
@@ -120,4 +120,3 @@ IF (CMAKE_MRPT_HAS_ASSIMP)
 		MESSAGE(STATUS " ASSIMP_VERSION: ${ASSIMP_VERSION}")
 	ENDIF ($ENV{VERBOSE})
 ENDIF (CMAKE_MRPT_HAS_ASSIMP)
-