ieeefp.h and arm

[Anthony Green]

Hi - 
     
     I'm slowly getting gcj working on the arm-elf toolchain so we can
enable it by default in gcc land.  I've found what looks to be a
problem in newlib's ieeefp.h (which libgcj borrows).

     The arm bits look like this:

#if defined(__arm__) || defined(__thumb__)
/* ARM always has big-endian words.  Within those words the byte ordering
   will be big or little endian depending upon the target.  */
#define __IEEE_BIG_ENDIAN
#ifdef __ARMEL__
#define __IEEE_BYTES_LITTLE_ENDIAN
#endif
#endif

     This seems to be at odds with what gcc/config/arm.h says:

#define CPP_ENDIAN_SPEC "\
%{mbig-endian:								\
  %{mlittle-endian:							\
    %e-mbig-endian and -mlittle-endian may not be used together}	\
  -D__ARMEB__ %{mwords-little-endian:-D__ARMWEL__} %{mthumb:-D__THUMBEB__}}\
%{mlittle-endian:-D__ARMEL__ %{mthumb:-D__THUMBEL__}}			\
%{!mlittle-endian:%{!mbig-endian:%(cpp_endian_default)}}		\
"

/* Default is little endian.  */
#define CPP_ENDIAN_DEFAULT_SPEC "-D__ARMEL__ %{mthumb:-D__THUMBEL__}"


     So... should ieeefp.h say something like this instead? 

#if defined(__arm__) || defined(__thumb__)
#ifdef __ARMEL__
#define __IEEE_LITTLE_ENDIAN
#define __IEEE_BYTES_LITTLE_ENDIAN
#else
#ifdef __ARMEB__
#ifdef __ARMWEL__
#define __IEEE_LITTLE_ENDIAN
#else
#define __IEEE_BIG_ENDIAN
#endif

    This doesn't look right either.  In any case, the original
definition definitely look wrong.


AG