* src/float/base/cl_ieee.cc: try to do magic to the FPU only if

    * src/float/base/cl_ieee.cc: try to do magic to the FPU only if
          _FPU_IEEE is really defined.
        * include/cln/modules.h: change assembler labels from `label' to
          `label:' on hppa, needed by Linux (see comment).
        * autoconf/acinclude.m4: new file (for storing CLN-specific macros).
        * Makefile.devel: adjusted.
        * autoconf/aclocal.m4: regenerate.
        * src/base/low/cl_low_mul.cc: moved POD variables that are declared
          extern "C" elsewhere out of the namespace.
        * src/base/low/cl_low_div.cc: Likewise.