autoconf/m4/pa_sym.m4

   1 dnl --------------------------------------------------------------------------
   2 dnl PA_SYM(prefix, string)
   3 dnl
   4 dnl Convert a (semi-) arbitrary string to a CPP symbol
   5 dnl Compact underscores and convert non-C characters to underscore,
   6 dnl except + which is converted to X (so C++ -> CXX).
   7 dnl --------------------------------------------------------------------------
   8 AC_DEFUN([PA_SYM],
   9 [m4_bpatsubsts(m4_quote(m4_toupper([$*])),
  10  [,],[],[\+],[X],[[^ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]+],[_],dnl
  11 [^._?\(.*\)_.$],[[\1]])])