I have a few SPARC binaries that have been compiled with what seems to be the SunPro CC compiler. The symbols in the binary are referring to a very early C++ implementation (pre-namespaces) and look like this:


Looking at these, I'm guessing that they correspond to the following methods:

istream::operator >>(unsigned long);
istream::operator >>(int);
istream::operator >>(float);
istream::operator >>(char *);
istream::operator(const char *);

To make further progress, I want to understand the mangling scheme used here, but my Google-fu is too weak. Where can I find documentation on the name mangling scheme used here?

  • No namespace support? That has to be back in the Sun Workshop days.
    – fpmurphy
    Commented Sep 11, 2018 at 2:37
  • 2
    The binary is over 15 years old. I can make some guesses as to the mangling scheme (__0 prefix, H = symbol of 7 chars follows, etc) but it would be nice to have a reference. I've searched open source repositories hoping to find a demangler but haven't found one that understands this particular demangling scheme. Commented Sep 11, 2018 at 11:54
  • I wonder if someone on Retrocomputing can find the info...
    – Igor Skochinsky
    Commented Sep 12, 2018 at 10:42

2 Answers 2


I found the following documentation on archive.org, as part of Sun WorkShop™ for Solaris 2.x



You should be able to use c++filt directly. Pay attention to not use the one from binutils. Make sure to use the right install path, eg:

  • /opt/SolarisStudio/solarisstudio12.3/prod/bin/c++filt
  • 3
    while this helps with the specific problem, it does not actually address the question as asked; are there any docs on the mangling scheme used?
    – Igor Skochinsky
    Commented Sep 10, 2018 at 19:29
  • @IgorSkochinsky That's an actual pretty good exercise to do then ! If OP has access to compiler, it should be possible to write the documentation (eg. itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling)
    – tibar
    Commented Sep 12, 2018 at 13:09

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