title: How to load private shared libraries within "rules" make file in deb-packaging
body: <p>I am making a dabian binary package for local use. <code>dpkg-buildpackage -rfakeroot</code> is failed due to below error.</p>
  
  <pre><code>find /home/dwft78/project/CoreScanner/cscore-1.0/lib -name "libcs*" -type f -exec cp -f {} /home/dwft78/project/CoreScanner/cscore-1.0/debian/cscore/opt/motorola-scanner//bin \;
  find /home/dwft78/project/CoreScanner/cscore-1.0/lib -name "libcs*" -type l -exec cp -Rf {} /home/dwft78/project/CoreScanner/cscore-1.0/debian/cscore/opt/motorola-scanner//bin \;
  make[1]: Leaving directory `/home/dwft78/project/CoreScanner/cscore-1.0'
     dh_install
     dh_installdocs
     dh_installchangelogs
     dh_installexamples
     dh_installman
     dh_installcatalogs
     dh_installcron
     dh_installdebconf
     dh_installemacsen
     dh_installifupdown
     dh_installinfo
     dh_pysupport
  dh_pysupport: This program is deprecated, you should use dh_python2 instead. Migration guide: http://deb.li/dhs2p
     dh_installinit
     dh_installmenu
     dh_installmime
     dh_installmodules
     dh_installlogcheck
     dh_installlogrotate
     dh_installpam
     dh_installppp
     dh_installudev
     dh_installwm
     dh_installxfonts
     dh_installgsettings
     dh_bugfiles
     dh_ucf
     dh_lintian
     dh_gconf
     dh_icons
     dh_perl
     dh_usrlocal
     dh_link
     dh_compress
     dh_fixperms
     dh_strip
     dh_makeshlibs
     dh_shlibdeps
  dpkg-shlibdeps: warning: debian/cscore/opt/motorola-scanner/bin/libcs-common.so.1.0.0 contains an unresolvable reference to symbol g_CoreScannerLoggingContext: it's probably a plugin.
  dpkg-shlibdeps: warning: 1 similar warning has been skipped (use -v to see it).
  dpkg-shlibdeps: error: couldn't find library libcs-comm.so.1.0.0 needed by debian/cscore/opt/motorola-scanner/bin/libcscl-snapi.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-client.so.1.0.0 needed by debian/cscore/opt/motorola-scanner/bin/libcs-jni.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: warning: debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-common.so.1.0.0 contains an unresolvable reference to symbol g_CoreScannerLoggingContext: it's probably a plugin.
  dpkg-shlibdeps: warning: 1 similar warning has been skipped (use -v to see it).
  dpkg-shlibdeps: error: couldn't find library libcs-comm.so.1.0.0 needed by debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcscl-snapi.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-common.so.1.0.0 needed by debian/cscore/opt/motorola-scanner/bin/libcs-comm.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-common.so.1.0.0 needed by debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-comm.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-common.so.1.0.0 needed by debian/cscore/opt/motorola-scanner/bin/libcs-client.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-common.so.1.0.0 needed by debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-client.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: couldn't find library libcs-client.so.1.0.0 needed by debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-jni.so.1.0.0 (ELF format: 'elf64-x86-64'; RPATH: '').
  dpkg-shlibdeps: error: Cannot continue due to the errors listed above.
  Note: libraries are not searched in other binary packages that do not have any shlibs or symbols file.
  To help dpkg-shlibdeps find private libraries, you might need to set LD_LIBRARY_PATH.
  dh_shlibdeps: dpkg-shlibdeps -Tdebian/cscore.substvars debian/cscore/debian/cscore/opt/motorola-scanner/bin/cscore debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcscl-snapi.so.1.0.0 debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-client.so.1.0.0 debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-common.so.1.0.0 debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-jni.so.1.0.0 debian/cscore/debian/cscore/opt/motorola-scanner/bin/libcs-comm.so.1.0.0 debian/cscore/opt/motorola-scanner/bin/cscore debian/cscore/opt/motorola-scanner/bin/libcscl-snapi.so.1.0.0 debian/cscore/opt/motorola-scanner/bin/libcs-client.so.1.0.0 debian/cscore/opt/motorola-scanner/bin/libcs-common.so.1.0.0 debian/cscore/opt/motorola-scanner/bin/libcs-jni.so.1.0.0 debian/cscore/opt/motorola-scanner/bin/libcs-comm.so.1.0.0 returned exit code 2
  make: *** [binary] Error 2
  dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2
  </code></pre>
  
  <p>all these libraries are generating to "<strong>/home/dwft78/project/CoreScanner/cscore-1.0/lib/Linux/x86_64</strong>" </p>
  
  <p>Contents of debian/rules is</p>
  
  <pre><code>#!/usr/bin/make -f
  # -*- makefile -*-
  # Sample debian/rules that uses debhelper.
  # This file was originally written by Joey Hess and Craig Small.
  # As a special exception, when this file is copied by dh-make into a
  # dh-make output file, you may use that output file without restriction.
  # This special exception was added by Craig Small in version 0.37 of dh-make.
  
  # Uncomment this to turn on verbose mode.
  #export DH_VERBOSE=1
  
  export DH_COMPAT=5
  
  %:
          dh $@
  </code></pre>
  
  <p>As the error message indicates "<strong>To help dpkg-shlibdeps find private libraries, you might need to set LD_LIBRARY_PATH</strong>" how can I load those inside <code>debian/rules</code> file ? or otherwise is this occurred due to an another reason ?</p>