[patch] AVR support for newlib

[Marek Michalkiewicz]

The patch below adds minimal AVR support to newlib, just to get it to
configure and build.  For now, it is mainly useful for avr-gcc testing
(today's CVS gcc passes, but in the past, especially the math library
has already helped to find a few bugs).  More changes to come later...

Thanks,
Marek


newlib/ChangeLog:

2000-06-27  Marek Michalkiewicz  <marekm@linux.org.pl>

	* configure.host: Add support for AVR target.
	* libc/include/machine/ieeefp.h: Likewise.
	* libc/include/sys/config.h: Likewise.


diff -Nrc3p orig/src/newlib/configure.host src/newlib/configure.host
*** orig/src/newlib/configure.host	Thu May 11 08:01:15 2000
--- src/newlib/configure.host	Tue Jun 27 12:16:15 2000
*************** case "${target_optspace}:${host}" in
*** 45,51 ****
    yes:*)
      newlib_cflags="${newlib_cflags} -Os"
      ;;
!   :m32r-* | :d10v-* | :d30v-*)
      newlib_cflags="${newlib_cflags} -Os"
      ;;
    no:* | :*)
--- 45,51 ----
    yes:*)
      newlib_cflags="${newlib_cflags} -Os"
      ;;
!   :m32r-* | :d10v-* | :d30v-* | :avr-*)
      newlib_cflags="${newlib_cflags} -Os"
      ;;
    no:* | :*)
*************** case "${host_cpu}" in
*** 68,73 ****
--- 68,76 ----
    arm)
  	machine_dir=arm
  	;;
+   avr*)
+ 	newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mcall-prologues"
+ 	;;
    d10v*)
  	machine_dir=d10v
  	;;
*************** case "${host}" in
*** 337,342 ****
--- 340,348 ----
  # See also thumb below.
  #	newlib_cflags="${newlib_cflags} -DARM_RDP_MONITOR"
  	newlib_cflags="${newlib_cflags} -DARM_RDI_MONITOR"
+ 	;;
+   avr*)
+ 	newlib_cflags="${newlib_cflags} -DNO_EXEC -DSMALL_MEMORY -DMISSING_SYSCALL_NAMES"
  	;;
    d10v*)
  	newlib_cflags="${newlib_cflags} -DSMALL_MEMORY"
diff -Nrc3p orig/src/newlib/libc/include/machine/ieeefp.h src/newlib/libc/include/machine/ieeefp.h
*** orig/src/newlib/libc/include/machine/ieeefp.h	Thu May 11 08:01:15 2000
--- src/newlib/libc/include/machine/ieeefp.h	Tue Jun 27 09:59:44 2000
***************
*** 152,157 ****
--- 152,163 ----
  #endif
  #endif
  
+ #ifdef __AVR__
+ #define __IEEE_LITTLE_ENDIAN
+ #define __SMALL_BITFIELDS
+ #define _DOUBLE_IS_32BITS
+ #endif
+ 
  #ifndef __IEEE_BIG_ENDIAN
  #ifndef __IEEE_LITTLE_ENDIAN
  #error Endianess not declared!!
diff -Nrc3p orig/src/newlib/libc/include/sys/config.h src/newlib/libc/include/sys/config.h
*** orig/src/newlib/libc/include/sys/config.h	Wed Jun 14 15:25:03 2000
--- src/newlib/libc/include/sys/config.h	Tue Jun 27 10:15:11 2000
***************
*** 25,31 ****
  #endif
  
  /* 16 bit integer machines */
! #if defined(__Z8001__) || defined(__Z8002__) || defined(__H8300__) || defined(__H8500__) || defined(__W65__) || defined (__H8300H__) || defined (__H8300S__) || defined (__mn10200__)
  
  #undef INT_MAX
  #undef UINT_MAX
--- 25,31 ----
  #endif
  
  /* 16 bit integer machines */
! #if defined(__Z8001__) || defined(__Z8002__) || defined(__H8300__) || defined(__H8500__) || defined(__W65__) || defined (__H8300H__) || defined (__H8300S__) || defined (__mn10200__) || defined (__AVR__)
  
  #undef INT_MAX
  #undef UINT_MAX
***************
*** 71,76 ****
--- 71,83 ----
  #define _DOUBLE_IS_32BITS
  #define __SMALL_BITFIELDS
  #define __IEEE_LITTLE_ENDIAN
+ #endif
+ 
+ #ifdef __AVR__
+ #define _DOUBLE_IS_32BITS
+ #define __SMALL_BITFIELDS
+ #define __IEEE_LITTLE_ENDIAN
+ #define _POINTER_INT short
  #endif
  
  #ifdef __TIC80__