[patch] allow host-specific nano-malloc default

[DJ Delorie]

This patch makes a few minor changes to the configury to allow targets
to default to nano-malloc instead of the usual malloc.  It also makes
nano-malloc the default for msp430.  Ok to apply?

	* configure.host (default_newlib_nano_malloc): New.
	(msp430): Set it.
	* configure.in (newlib_nano_malloc): Leave unset if not set by
	the user.
	* configure: Regenerate.
	* libc/configure.in (NEWLIB_NANO_MALLOC): Set after running
	configure.host.
	(newlib_nano_malloc): Leave unset if not set by	the user.
	* libc/configure: Regenerate.

Index: configure.host
===================================================================
RCS file: /cvs/src/src/newlib/configure.host,v
retrieving revision 1.134
diff -p -U 5 -r1.134 configure.host
--- configure.host	4 Apr 2014 21:40:58 -0000	1.134
+++ configure.host	9 Jun 2014 20:38:33 -0000
@@ -69,10 +69,11 @@ have_sys_mach_dir=no
 default_newlib_io_c99_formats=no
 default_newlib_io_long_long=no
 default_newlib_io_long_double=no
 default_newlib_io_pos_args=no
 default_newlib_atexit_dynamic_alloc=yes
+default_newlib_nano_malloc=no
 aext=a
 oext=o
 lpfx="lib_a-"
 
 case "${target_optspace}:${host}" in
@@ -227,10 +228,11 @@ case "${host_cpu}" in
   msp430*)
 	newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -DSMALL_MEMORY"
 	newlib_cflags="${newlib_cflags} -ffunction-sections -fdata-sections "
 	newlib_cflags="${newlib_cflags} -mOs "
 	machine_dir=msp430
+	default_newlib_nano_malloc="yes"
 	;;
   mt*)
 	machine_dir=mt
 	;;
   nds32*)
@@ -841,10 +843,17 @@ if [ "x${newlib_atexit_dynamic_alloc}" =
 	if [ ${default_newlib_atexit_dynamic_alloc} = "yes" ]; then
 		newlib_atexit_dynamic_alloc="yes"; 
 	fi
 fi
 
+# Enable nano-malloc if requested.
+if [ "x${newlib_nano_malloc}" = "x" ]; then
+	if [ ${default_newlib_nano_malloc} = "yes" ]; then
+		newlib_nano_malloc="yes";
+	fi
+fi
+
 # Remove rpc headers if xdr_dir not specified
 if [ "x${xdr_dir}" = "x" ]; then
 	noinclude="${noinclude} rpc/types.h rpc/xdr.h"
 fi
 
Index: configure.in
===================================================================
RCS file: /cvs/src/src/newlib/configure.in,v
retrieving revision 1.55
diff -p -U 5 -r1.55 configure.in
--- configure.in	10 Dec 2013 18:57:30 -0000	1.55
+++ configure.in	9 Jun 2014 20:38:33 -0000
@@ -179,11 +179,11 @@ AC_ARG_ENABLE(newlib-nano-malloc,
   case "${enableval}" in
     yes) newlib_nano_malloc=yes ;;
     no)  newlib_nano_malloc=no  ;;
     *)   AC_MSG_ERROR(bad value ${enableval} for newlib-nano-malloc option) ;;
   esac
- fi], [newlib_nano_malloc=no])dnl
+ fi], [newlib_nano_malloc=])dnl
 
 dnl Support --disable-newlib-unbuf-stream-opt
 AC_ARG_ENABLE(newlib-unbuf-stream-opt,
 [  --disable-newlib-unbuf-stream-opt    disable unbuffered stream optimization in streamio],
 [if test "${newlib_unbuf_stream_opt+set}" != set; then
Index: libc/configure.in
===================================================================
RCS file: /cvs/src/src/newlib/libc/configure.in,v
retrieving revision 1.24
diff -p -U 5 -r1.24 configure.in
--- libc/configure.in	12 Aug 2013 11:31:53 -0000	1.24
+++ libc/configure.in	9 Jun 2014 20:38:33 -0000
@@ -22,15 +22,16 @@ AC_ARG_ENABLE(newlib_nano_malloc,
 [  --enable-newlib-nano-malloc    Use small-footprint nano-malloc implementation],
 [case "${enableval}" in
    yes) newlib_nano_malloc=yes ;;
    no)  newlib_nano_malloc=no ;;
    *) AC_MSG_ERROR(bad value ${enableval} for newlib-nano-malloc) ;;
- esac],[newlib_nano_malloc=no])
-AM_CONDITIONAL(NEWLIB_NANO_MALLOC, test x$newlib_nano_malloc = xyes)
+ esac],[newlib_nano_malloc=])
 
 NEWLIB_CONFIGURE(..)
 
+AM_CONDITIONAL(NEWLIB_NANO_MALLOC, test x$newlib_nano_malloc = xyes)
+
 dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and
 dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first
 dnl line of the macro which fail because appropriate LDFLAGS are not set.
 _LT_DECL_SED
 _LT_PROG_ECHO_BACKSLASH