use DESTDIR properly

ChangeLog

@@ -2,6 +2,10 @@
 06.11.12 Release CLHEP-2.1.3.0
 ==============================
 
+2012-11-08  Lynn Garren <garren@fnal.gov>
+
+	* creation of symbolic links now respects DESTDIR
+
 2012-09-06  Joe Boudreau <boudreau@cern.ch>
 
 	* MATRIX/DiagMatrix, MATRIX/GenMatrix, MATRIX/SymMatrix: 

cmake/Modules/ClhepBuildLibrary.cmake

@@ -91,9 +91,9 @@ macro(clhep_build_libclhep )
   else()
       # create the symbolic links
       file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/clhep_static_symlink 
-        	 "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink ${CMAKE_STATIC_LIBRARY_PREFIX}CLHEP-${VERSION}${CMAKE_STATIC_LIBRARY_SUFFIX} ${CMAKE_STATIC_LIBRARY_PREFIX}CLHEP${CMAKE_STATIC_LIBRARY_SUFFIX} WORKING_DIRECTORY \"$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}\" )" )
+        	 "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink ${CMAKE_STATIC_LIBRARY_PREFIX}CLHEP-${VERSION}${CMAKE_STATIC_LIBRARY_SUFFIX} ${CMAKE_STATIC_LIBRARY_PREFIX}CLHEP${CMAKE_STATIC_LIBRARY_SUFFIX} WORKING_DIRECTORY \"\$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}\" )" )
       file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/clhep_shared_symlink 
-        	 "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink ${CMAKE_SHARED_LIBRARY_PREFIX}CLHEP-${VERSION}${CMAKE_SHARED_LIBRARY_SUFFIX} ${CMAKE_SHARED_LIBRARY_PREFIX}CLHEP${CMAKE_SHARED_LIBRARY_SUFFIX} WORKING_DIRECTORY \"$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}\" )" )
+        	 "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink ${CMAKE_SHARED_LIBRARY_PREFIX}CLHEP-${VERSION}${CMAKE_SHARED_LIBRARY_SUFFIX} ${CMAKE_SHARED_LIBRARY_PREFIX}CLHEP${CMAKE_SHARED_LIBRARY_SUFFIX} WORKING_DIRECTORY \"\$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}\" )" )
   endif()
 
   INSTALL(SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/clhep_static_symlink )