求助大神，linux下编译gcc过程中出现error

number -I../../../gcc-4.7.1/gcc/../libdecnumber/bid -I../libdecnumber \
-o build/genconstants.o ../../../gcc-4.7.1/gcc/genconstants.c
make[3]: *** 没有规则可以创建“build/genconstants”需要的目标“../build-i686-pc-linux-gnu/libiberty/libiberty.a”。 停止。
make[3]: Leaving directory `/root/liang/gcc-build/host-i686-pc-linux-gnu/gcc'
make[2]: *** [all-stage1-gcc] 错误 2
make[2]: Leaving directory `/root/liang/gcc-build'
make[1]: *** [stage1-bubble] 错误 2
make[1]: Leaving directory `/root/liang/gcc-build'
make: *** [all] 错误 2

<bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
configure:3427: gcc --version >&5
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.