u-boot编译浮点匹配问题

上午用arm-linux-gcc-3.3.2编译u-boot-1.1.6，我按照教程将  u-boot-1.1.6/cpu/arm920t/config.mk 中的软浮点运算舍去。

#   // 原u-boot-1.1.6/cpu/arm920t/config.mk
# (C) Copyright 2002
# Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
#
# 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_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))

 

#   // 原u-boot-1.1.6/cpu/arm920t/config.mk
# (C) Copyright 2002
# Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
#
# 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_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,))

arm-linux-ld: ERROR: lib_arm/libarm.a(board.o) uses hardware FP, whereas u-boot uses software FP
File in wrong format: failed to merge target specific data of file lib_arm/libarm.a(board.o)
arm-linux-ld: ERROR: /usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/libgcc.a(_udivdi3.oS) uses hardware FP, whereas u-boot uses software FP
File in wrong format: failed to merge target specific data of file /usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/libgcc.a(_udivdi3.oS)
arm-linux-ld: ERROR: /usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/libgcc.a(_clz.oS) uses hardware FP, whereas u-boot uses software FP
File in wrong format: failed to merge target specific data of file /usr/local/arm/3.3.2/lib/gcc-lib/arm-linux/3.3.2/libgcc.a(_clz.oS)

 

在网上搜查解决方案，方案一：

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,)) 。

编译之后还是出现软硬浮点错误，后来再寻求答案。

方案二：

将编译器换成3.4.5。编译器换成3.4.5之后，一编译就通过。

 

总结：问题已经解决，但还是不知道为什么教程里用3.3.2版本的编译器能通过我用3.3.2版本就不能通过