U-boot编译出错（软浮点编译错误arm-linux-ld: ERROR）

我的装备：

操作系统：Redhat9.0

编译器：arm-linux-gcc-3.4.6

u-boot版本：u-boot-2009.08

错误代码如下：
arm-linux-ld: ERROR: /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-2.3.6/arm-linux/bin/../lib/gcc/arm-

linux/3.4.6/libgcc.a(_udivsi3.oS) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-

2.3.6/arm-linux/bin/../lib/gcc/arm-linux/3.4.6/libgcc.a(_udivsi3.oS)
arm-linux-ld: ERROR: /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-2.3.6/arm-linux/bin/../lib/gcc/arm-

linux/3.4.6/libgcc.a(_divsi3.oS) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-

2.3.6/arm-linux/bin/../lib/gcc/arm-linux/3.4.6/libgcc.a(_divsi3.oS)
arm-linux-ld: ERROR: /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-2.3.6/arm-linux/bin/../lib/gcc/arm-

linux/3.4.6/libgcc.a(_umodsi3.oS) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-

2.3.6/arm-linux/bin/../lib/gcc/arm-linux/3.4.6/libgcc.a(_umodsi3.oS)
arm-linux-ld: ERROR: /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-2.3.6/arm-linux/bin/../lib/gcc/arm-

linux/3.4.6/libgcc.a(_modsi3.oS) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-

2.3.6/arm-linux/bin/../lib/gcc/arm-linux/3.4.6/libgcc.a(_modsi3.oS)
arm-linux-ld: ERROR: /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-2.3.6/arm-linux/bin/../lib/gcc/arm-

linux/3.4.6/libgcc.a(_dvmd_lnx.oS) uses hardware FP, whereas u-boot uses software FP
arm-linux-ld: failed to merge target specific data of file /up-Star2410/arm-linux-tools/gcc-3.4.6-glibc-

2.3.6/arm-linux/bin/../lib/gcc/arm-linux/3.4.6/libgcc.a(_dvmd_lnx.oS)
make: *** [u-boot] Error 1

错误截图如下：

问题分析：

linux/3.4.6/libgcc.a(_modsi3.oS) uses hardware FP, whereas u-boot uses software FP

译链接器3.4.6用的是hardware FP，而u-boot 使用的是 software FP 。

解决办法：

用vi 打开/cpu/arm920t/config.mk文件

原始如下：

#
# (C) Copyright 2002
# Gary Jennejohn, DENX Software Engineering, <[e-mail]>
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#

PLATFORM_RELFLAGS += -fno-strict-aliasing-fno-common -ffixed-r8 \
-msoft-float

PLATFORM_CPPFLAGS += -march=armv4
# =========================================================================
#
# Supply options according to compiler version
#
# =========================================================================
PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))

修改后如下：（注意红色为修改后的）

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#

PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8

PLATFORM_CPPFLAGS += -march=armv4
# =========================================================================
#
# Supply options according to compiler version
#
# =========================================================================
PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32)
PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malig\nment-traps,))

结果：

编译通过，产生u-boot.bin