Only specific older versions of the GCC compiler (mostly OpenBSD-specific versions) used the bounded function attributes.
Since we're really only compiling the lamp/MacRelix headers with either Codewarrior or Retro68, there really isn't much reason to leave them in the tree. At best, they're ignored (by Metrowerks), and at worst they cause nasty compile-time errors (any modern GCC like the one in Retro68's toolchain).
Only specific older versions of the GCC compiler (mostly OpenBSD-specific versions) used the bounded function attributes.
Since we're really only compiling the lamp/MacRelix headers with either Codewarrior or Retro68, there really isn't much reason to leave them in the tree. At best, they're ignored (by Metrowerks), and at worst they cause nasty compile-time errors (any modern GCC like the one in Retro68's toolchain).