Fix compile issue

DSView/CMake/FindFFTW.cmake

+# - Find FFTW
+# Find the native FFTW includes and library
+# This module defines
+#  FFTW_INCLUDE_DIR, where to find fftw3.h, etc.
+#  FFTW_LIBRARIES, the libraries needed to use FFTW.
+#  FFTW_FOUND, If false, do not try to use FFTW.
+# also defined, but not for general use are
+#  FFTW_LIBRARY, where to find the FFTW library.
+
+FIND_PATH(FFTW_INCLUDE_DIR fftw3.h
+/usr/local/include
+/usr/include
+/opt/local/lib
+)
+
+SET(FFTW_NAMES ${FFTW_NAMES} fftw3 fftw3f fftw3-3)
+FIND_LIBRARY(FFTW_LIBRARY
+  NAMES ${FFTW_NAMES}
+  PATHS /usr/lib /usr/local/lib /opt/locala/lib
+  )
+
+# Find threads part of FFTW
+
+SET(FFTW_THREADS_NAMES ${FFTW_THREADS_NAMES} fftw3f_threads fftw3_threads fftw3-3_threads)
+FIND_LIBRARY(FFTW_THREADS_LIBRARY
+  NAMES ${FFTW_THREADS_NAMES}
+  PATHS /usr/lib /usr/local/lib /opt/local/lib
+  )
+
+IF (FFTW_THREADS_LIBRARY AND FFTW_INCLUDE_DIR)
+    SET(FFTW_THREADS_LIBRARIES ${FFTW_THREADS_LIBRARY})
+    SET(FFTW_THREADS_FOUND "YES")
+ELSE (FFTW_THREADS_LIBRARY AND FFTW_INCLUDE_DIR)
+  SET(FFTW_THREADS_FOUND "NO")
+ENDIF (FFTW_THREADS_LIBRARY AND FFTW_INCLUDE_DIR)
+
+
+IF (FFTW_THREADS_FOUND)
+   IF (NOT FFTW_THREADS_FIND_QUIETLY)
+      MESSAGE(STATUS "Found FFTW threads: ${FFTW_THREADS_LIBRARIES}")
+   ENDIF (NOT FFTW_THREADS_FIND_QUIETLY)
+ELSE (FFTW_THREADS_FOUND)
+   IF (FFTW_THREADS_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find FFTW threads library")
+   ENDIF (FFTW_THREADS_FIND_REQUIRED)
+ENDIF (FFTW_THREADS_FOUND)
+
+
+IF (FFTW_LIBRARY AND FFTW_INCLUDE_DIR)
+    SET(FFTW_LIBRARIES ${FFTW_LIBRARY})
+    SET(FFTW_FOUND "YES")
+ELSE (FFTW_LIBRARY AND FFTW_INCLUDE_DIR)
+  SET(FFTW_FOUND "NO")
+ENDIF (FFTW_LIBRARY AND FFTW_INCLUDE_DIR)
+
+
+IF (FFTW_FOUND)
+   IF (NOT FFTW_FIND_QUIETLY)
+      MESSAGE(STATUS "Found FFTW: ${FFTW_LIBRARIES}")
+   ENDIF (NOT FFTW_FIND_QUIETLY)
+ELSE (FFTW_FOUND)
+   IF (FFTW_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find FFTW library")
+   ENDIF (FFTW_FIND_REQUIRED)
+ENDIF (FFTW_FOUND)
+
+SET (ON_UNIX ${CMAKE_SYSTEM_NAME} STREQUAL "Linux" OR
+             ${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
+IF (${ON_UNIX})
+   SET (FFTW_EXECUTABLE_LIBRARIES fftw3f fftw3f_threads)
+ENDIF (${ON_UNIX})

INSTALL

@@ -38,9 +38,9 @@ Step2: Installing the requirements:
 
 please check your respective distro's package manager tool if you use other distros
 Debian/Ubuntu:
- $ sudo apt-get install git-core gcc gcc-c++ make cmake autoconf automake libtool pkg-config \
+ $ sudo apt-get install git-core build-essential cmake autoconf automake libtool pkg-config \
    libglib2.0-dev libzip-dev libudev-dev libusb-1.0-0-dev \
-   python3-dev qt5-default qt5-qtbase-devel libboost-dev libboost-test-dev libboost-thread-dev libboost-system-dev libboost-filesystem-dev check libfftw3-dev
+   python3-dev qt5-default libboost-dev libboost-test-dev libboost-thread-dev libboost-system-dev libboost-filesystem-dev check libfftw3-dev
 
 Fedora (18, 19):
  $ sudo yum install git gcc g++ make cmake autoconf automake libtool pkgconfig glib2-devel \