What does __sn mean in the map file generated by the GNU linker?

Hello --


I am in the midst of debugging a problem that is causing me to look at
the MAP file generated by the linker. In doing so, I came across a
symbol that I cannot understand.


The code has numerous global variables. However, in the map file,
some of these global variables, in addition to their normal entry in
the MAP file, have an additional entry. This additional entry is the
one I can't understand. Here's an example:


      I have the following global variable:
      nuHRD HRDElem;


where nuHRD is a class.


      In the map file, I saw the following 2 lines:


      Allocating common HRDElem: 2f0 at 368 nuINSInterface.o
      Allocating common __snHRDElem.112: 4 at 1c nuINSInterface.o


The first makes sense to me, but I have no idea what the second one
is. What's meant by "__sn"???


Andy

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