Follow symlink for tcmalloc libraries.

The gperftools runtime package will only have the version library files
and not the symbolic link.
Refs #10912

Code/Mantid/Build/CMake/LinuxPackageScripts.cmake

@@ -23,9 +23,19 @@ endif()
 set ( CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/${LIB_DIR};${CMAKE_INSTALL_PREFIX}/${PLUGINS_DIR};${CMAKE_INSTALL_PREFIX}/${PVPLUGINS_DIR} )
 
 ###########################################################################
-# LD_PRELOAD libraries
+# LD_PRELOAD TCMalloc
 ###########################################################################
-set ( EXTRA_LDPRELOAD_LIBS "${TCMALLOC_LIBRARIES}" )
+# User systems will only have the libraries and not the symbolic link
+# so we must set the preload to the versioned library. We will assume it is
+# in the same location as the system that the package was built on
+if ( TCMALLOC_LIBRARIES )
+  execute_process ( COMMAND readlink --no-newline --canonicalize-existing ${TCMALLOC_LIBRARIES}
+                    OUTPUT_VARIABLE TCMALLOC_PRELOAD
+                    RESULT_VARIABLE READLINK_RESULT )
+  if ( READLINK_RESULT EQUAL 1 )
+    message ( FATAL_ERROR "Unable to find real file that tcmalloc symlink, ${TCMALLOC_LIBRARIES}, points to." )
+  endif()
+endif()
 
 ###########################################################################
 # Environment scripts (profile.d)

Code/Mantid/Build/CMake/Packaging/launch_mantidplot.sh.in

@@ -9,7 +9,7 @@ SCRIPTFILE=$(readlink -f "$0")
 INSTALLDIR=$(echo $SCRIPTFILE | sed -r -e 's|^(.*)/(.*)$|\1|g') #.* is greedy and eats up until the final slash
 
 # Define extra libraries and load paths
-LOCAL_PRELOAD=$(readlink -f @EXTRA_LDPRELOAD_LIBS@)
+LOCAL_PRELOAD=@TCMALLOC_PRELOAD@
 if [ -n "${LD_PRELOAD}" ]; then
     LOCAL_PRELOAD=${LOCAL_PRELOAD}:${LD_PRELOAD}
 fi