title: unrecognised command line option '-m64' in NVIDIA Jetson TX2
body: <p>I am using an NVIDIA Jetson TX2. I am trying to generate an ".so" file using "make" for the DynamixelSDK. But I am getting this Error: </p>
  
  <pre><code>mkdir -p ./.objects/
  gcc -O2 -O3 -DLINUX -D_GNU_SOURCE -Wall -c -I../../include/dynamixel_sdk -m64 -fPIC -g -c ../../src/dynamixel_sdk/group_bulk_read.c -o .objects/group_bulk_read.o
  gcc: error: unrecognized command line option ‘-m64’
  Makefile:114: recipe for target '.objects/group_bulk_read.o' failed
  make: *** [.objects/group_bulk_read.o] Error 1
  </code></pre>
  
  <p>You can access the make file at- <a href="https://pastebin.com/zz9MNnqp" rel="nofollow noreferrer">https://pastebin.com/zz9MNnqp</a></p>
  
  <p>Here's a part of the MakeFile : </p>
  
  <pre><code>#---------------------------------------------------------------------
  # C COMPILER, COMPILER FLAGS, AND TARGET PROGRAM NAME
  #---------------------------------------------------------------------
  DIR_DXL     = ../..
  DIR_OBJS    = ./.objects
  
  INSTALL_ROOT = /usr/local
  
  MAJ_VERSION = 2
  MIN_VERSION = 0
  REV_VERSION = 0
  
  TARGET      = libdxl_x64_c.so
  TARGET1     = $(TARGET).$(MAJ_VERSION)
  TARGET2     = $(TARGET).$(MAJ_VERSION).$(MIN_VERSION)
  TARGET3     = $(TARGET).$(MAJ_VERSION).$(MIN_VERSION).$(REV_VERSION)
  
  CHK_DIR_EXISTS = test -d
  PRINT       = echo
  STRIP       = strip
  AR          = ar
  ARFLAGS     = cr
  LD          = g++
  LDFLAGS     = -shared -fPIC $(FORMAT)#-Wl,-soname,dxl
  LD_CONFIG   = ldconfig
  CP          = cp
  CP_ALL      = cp -r
  RM          = rm
  RM_ALL      = rm -rf
  SYMLINK     = ln -s
  MKDIR       = mkdir
  CC          = gcc
  CX          = g++
  CCFLAGS     = -O2 -O3 -DLINUX -D_GNU_SOURCE -Wall -c $(INCLUDES) $(FORMAT) -fPIC -g
  CXFLAGS     = -O2 -O3 -DLINUX -D_GNU_SOURCE -Wall -c $(INCLUDES) $(FORMAT) -fPIC -g
  FORMAT     = -m64
  INCLUDES    += -I$(DIR_DXL)/include/dynamixel_sdk
   #---------------------------------------------------------------------
  </code></pre>
  
  <p>Tried Both the 32 and 64 bit Versions of the MakeFile (for linux).</p>
  
  <p>I don't know hoe to solve this error. Any help would be appreciated.</p>