[patch] msvc demangling binutils

[Aaron W. LaFramboise]

Eddy Pronk wrote:
> It uses a win32 API call to UnDecorateSymbolName.
> 
> I managed to link manually to libimagehlp.a, but failed to
> integrate it in the build.

This functionality is good, but I am concerned about the DLL dependency. 
  According to my docs, the API is actually dbghelp.dll, which is not 
present on Win9x or WinNT.  I think the imagehlp interface is older, but 
I don't think it has the same capabilities.  There is some legacy issue 
here that I don't really know about.  dbghelp.dll is availible as a 
redistributable for these systems, but I am sure it is not appropriate 
to include this in the binutils distribution.

I think the way to do this would be to do a autoconf check for the 
presence of the prototype of UnDecorateSymbolName in <dbghelp.h>, 
presence of the UnDecorateSymbolName symbol in -ldbghelp, and a check 
that an executable linked against this symbol in dbghelp will actually 
run (to ensure the system actually has the DLL).

Aaron W. LaFramboise