Update to buildroot toolchain for nios2

I have tested the new buildroot.

It works now with buildroot-snapshot, uClibc-0.9.28, busybox-snapshot.

http://buildroot.uclibc.org/downloads/snap...napshot.tar.bz2 (http://buildroot.uclibc.org/downloads/snapshots/buildroot-snapshot.tar.bz2)

http://www.uclibc.org/downloads/uclibc-0.9.28.tar.bz2 (http://www.uclibc.org/downloads/uclibc-0.9.28.tar.bz2)

http://busybox.net/downloads/snapshots/bus...napshot.tar.bz2 (http://busybox.net/downloads/snapshots/busybox-snapshot.tar.bz2)

1. unpack buildroot , tar jxf buildroot-snapshot.tar.bz2

2. download uClibc-0.9.28 into buildroot/dl dir.

# unpack uClibc-0.9.28,

tar jxf uClibc-0.9.28.tar.bz2

# remove the line of "default nios2-elf-" from uClibc-0.9.28/extran/Configs/Config.nios2

# repack

tar jcf uClibc-0.9.28.tar.bz2 uClibc-0.9.28

3. update buildroot/package/busybox/busybox.config

CONFIG_STATIC=y
EXTRA_CFLAGS_OPTIONS="-D__uClinux__ -Dfork=vfork"#  CONFIG_START_STOP_DAEMON is not set
CONFIG_FEATURE_2_6_MODULES=y

4. update buildroot/toolchain/uClibc/uClibc.config

  DL_FINI_CRT_COMPAT=y
  COMPAT_ATEXIT=y

5. get the elf2flt patch of marc's into buildroot/dl

http://bugs.uclibc.org/file_download.php?f...id=225&type=bug (http://bugs.uclibc.org/file_download.php?file_id=225&type=bug)

update the first part of elf2flt.diff

Index: buildroot/toolchain/Config.in
===================================================================
--- buildroot/toolchain/Config.in    2006-01-07 16:15:08.000000000 +0800
+++ buildroot/toolchain/Config.in    2006-01-09 09:08:15.000000000 +0800
@@ -10,6 +10,7 @@
 source "toolchain/ccache/Config.in"
 source "toolchain/gdb/Config.in"
 source "toolchain/sstrip/Config.in"
+source "toolchain/elf2flt/Config.in"
 
 
 comment "Common Toolchain Options"

Apply the patch

cd buildroot

patch -p1 <dl/elf2flt.diff

6. in buildroot dir

make menuconfig

select nios2, in toolchain option,

[ ] Use a daily snapshot of uClibc?

[*] Enable elf2flt support?

[ ] Include target utils in cross toolchain

7. make, it will make binutils,gcc,uclibc, and fail in busybox

8. update the busybox&#39;s

buildroot/build_nios2/busybox/Rules.mak, add elf2flt

#LDFLAGS+=-nostdlib# LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
LDFLAGS+=-Wl,-elf2flt="-s 16000" -Wl,-v -Wl,-d
LIBRARIES:=-lc -lgcc

buildroot/build_nios2/busybox/Makefile, comment out the stripcmd

busybox: .depend $(libraries-y)
    $(CC) $(EXTRA_CFLAGS) $(LDFLAGS) -o $@ -Wl,--start-group $(libraries-y) $(LIBRARIES) -Wl,--end-group#     $(STRIPCMD) $@

9. cd buildroot/build_nios2/busybox, make menuconfig

in "shell->", choose default shell "msh", unselect ash, select "standalone shell".

10. back to buildroot/

make, and it will build busybox

11. copy the buildroot/build_nios2/root to another place, cp -a

remove usr/lib,usr/include

it is your new root fs now.

add a sym-link for initramfs , ln -s /sbin/init init

This is the cross compiler for nios2 with default to uClibc, and the root fs with busybox.

Thanks a lots, to marc and vapier.