MERGE branch STM 325:449 into trunk

git-svn-id: http://rtabmap.googlecode.com/svn/trunk/rtabmap@450 f169173b-cf89-36c8-b27e-44dbe73f0c83

cmake_modules/FindFFTW3F.cmake

@@ -0,0 +1,34 @@
+# - Find FFTW3F
+# This module finds an installed FFTW3F package.
+#
+# It sets the following variables:
+#  FFTW3F_FOUND       - Set to false, or undefined, if FFTW3F isn't found.
+#  FFTW3F_INCLUDE_DIRS - The FFTW3F include directory.
+#  FFTW3F_LIBRARIES    - The FFTW3F library to link against.
+#
+# 
+     
+
+     
+FIND_PATH(FFTW3F_INCLUDE_DIRS 
+          fftw3.h
+          PATHS fftw/)
+
+FIND_LIBRARY(FFTW3F_LIBRARIES NAMES fftw3f-3 fftw3f libfftw3f-3)
+
+IF (FFTW3F_INCLUDE_DIRS AND FFTW3F_LIBRARIES)
+   SET(FFTW3F_FOUND TRUE)
+ENDIF (FFTW3F_INCLUDE_DIRS AND FFTW3F_LIBRARIES)
+
+IF (FFTW3F_FOUND)
+   # show which FFTW3F was found only if not quiet
+   IF (NOT FFTW3F_FIND_QUIETLY)
+      MESSAGE(STATUS "Found FFTW3F: ${FFTW3F_LIBRARIES}")
+   ENDIF (NOT FFTW3F_FIND_QUIETLY)
+ELSE (FFTW3F_FOUND)
+   # fatal error if FFTW3F is required but not found
+   IF (FFTW3F_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find FFTW3F")
+   ENDIF (FFTW3F_FIND_REQUIRED)
+ENDIF (FFTW3F_FOUND)
+