Warning, file /education/labplot/admin/parse_valgrind_suppressions.sh was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 #! /usr/bin/awk -f
 # A script to extract the actual suppression info from the output of (for example) valgrind --leak-check=full --show-reachable=yes --error-limit=no --gen-suppressions=all ./minimal
 # The desired bits are between ^{ and ^} (including the braces themselves).
 # The combined output should either be appended to /usr/lib/valgrind/default.supp, or placed in a .supp of its own
 # If the latter, either tell valgrind about it each time with --suppressions=<filename>, or add that line to ~/.valgrindrc
  
 # NB This script uses the |& operator, which I believe is gawk-specific. In case of failure, check that you're using gawk rather than some other awk
  
 # The script looks for suppressions. When it finds one it stores it temporarily in an array,
 # and also feeds it line by line to the external app 'md5sum' which generates a unique checksum for it.
 # The checksum is used as an index in a different array. If an item with that index already exists the suppression must be a duplicate and is discarded.
  
 BEGIN { suppression=0; md5sum = "md5sum" }
   # If the line begins with '{', it's the start of a supression; so set the var and initialise things
   /^{/  {
            suppression=1;  i=0; next 
         }
   # If the line begins with '}' its the end of a suppression
   /^}/  {
           if (suppression)
            { suppression=0;
              close(md5sum, "to")  # We've finished sending data to md5sum, so close that part of the pipe
              ProcessInput()       # Do the slightly-complicated stuff in functions
              delete supparray     # We don't want subsequent suppressions to append to it!
            }
      }
   # Otherwise, it's a normal line. If we're inside a supression, store it, and pipe it to md5sum. Otherwise it's cruft, so ignore it
      { if (suppression)
          { 
             supparray[++i] = $0
             print |& md5sum
          }
      }
  
  
  function ProcessInput()
  {
     # Pipe the result from md5sum, then close it     
     md5sum |& getline result
     close(md5sum)
     # gawk can't cope with enormous ints like $result would be, so stringify it first by prefixing a definite string
     resultstring = "prefix"result
  
     if (! (resultstring in chksum_array) )
       { chksum_array[resultstring] = 0;  # This checksum hasn't been seen before, so add it to the array
         OutputSuppression()              # and output the contents of the suppression
       }
  }
  
  function OutputSuppression()
  {
   # A suppression is surrounded by '{' and '}'. Its data was stored line by line in the array  
   print "{"  
   for (n=1; n <= i; ++n)
     { print supparray[n] }
   print "}" 
  }