NAME

       llvm-cxxmap - Mangled name remapping tool

SYNOPSIS

       llvm-cxxmap [options] symbol-file-1 symbol-file-2

DESCRIPTION

       The  llvm-cxxmap  tool  performs  fuzzy  matching  of  C++  mangled names, based on a file
       describing name components that should be considered equivalent.

       The symbol files should contain a list of C++ mangled names (one per line).   Blank  lines
       and  lines  starting  with  #  are  ignored.  The  output is a list of pairs of equivalent
       symbols, one per line, of the form

          <symbol-1> <symbol-2>

       where <symbol-1>  is  a  symbol  from  symbol-file-1  and  <symbol-2>  is  a  symbol  from
       symbol-file-2. Mappings for which the two symbols are identical are omitted.

OPTIONS

       -remapping-file=file, -r=file
              Specify  a  file  containing  a  list  of  equivalence rules that should be used to
              determine whether two symbols are equivalent. Required.  See REMAPPING FILE.

       -output=file, -o=file
              Specify a file to write the list of matched names to. If unspecified, the list will
              be written to stdout.

       -Wambiguous
              Produce  a  warning  if  there  are  multiple  equivalent (but distinct) symbols in
              symbol-file-2.

       -Wincomplete
              Produce a warning if  symbol-file-1  contains  a  symbol  for  which  there  is  no
              equivalent symbol in symbol-file-2.

REMAPPING FILE

       The remapping file is a text file containing lines of the form

          fragmentkind fragment1 fragment2

       where  fragmentkind  is  one  of name, type, or encoding, indicating whether the following
       mangled name fragments are <name>s, <type>s, or <encoding>s,  respectively.   Blank  lines
       and lines starting with # are ignored.

       Unmangled  C  names  can  be  expressed  as  an  encoding  that  is a (length-prefixed) <‐
       source-name>:

          # C function "void foo_bar()" is remapped to C++ function "void foo::bar()".
          encoding 7foo_bar _Z3foo3barv

       For convenience, built-in <substitution>s such as St and Ss are accepted as <name>s  (even
       though they technically are not <name>s).

       For  example,  to specify that absl::string_view and std::string_view should be treated as
       equivalent, the following remapping file could be used:

          # absl::string_view is considered equivalent to std::string_view
          type N4absl11string_viewE St17basic_string_viewIcSt11char_traitsIcEE

          # std:: might be std::__1:: in libc++ or std::__cxx11:: in libstdc++
          name St St3__1
          name St St7__cxx11

       NOTE:
          Symbol remapping is currently only  supported  for  C++  mangled  names  following  the
          Itanium  C++  ABI mangling scheme. This covers all C++ targets supported by Clang other
          than Windows targets.

AUTHOR

       Maintained by the LLVM Team (https://llvm.org/).

COPYRIGHT

       2003-2022, LLVM Project