将openwrt  trunk 分支上iperf 2.0.9移植到 bb版本上时，编译遇到如下问题：

make[6]: Entering directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/man'

make[6]: Nothing to be done for 'all'.

make[6]: Leaving directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/man'

make[6]: Entering directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9'

make[6]: Leaving directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9'

make[5]: Leaving directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9'

make[4]: Leaving directory '/home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9'

touch /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/.built

mkdir -p /home/hbg/bb/bin/ar71xx/packages /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/ipkg-ar71xx/iperf/CONTROL /home/hbg/bb/staging_dir/target-mips_34kc_uClibc-0.9.33.2/pkginfo

install -d -m0755 /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/ipkg-ar71xx/iperf/usr/bin

install -m0755 /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/src/iperf /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/ipkg-ar71xx/iperf/usr/bin/iperf

find /home/hbg/bb/build_dir/target-mips_34kc_uClibc-0.9.33.2/iperf-2.0.9/ipkg-ar71xx/iperf -name 'CVS' -o -name '.svn' -o -name '.#*' -o -name '*~'| xargs -r rm -rf

Package iperf is missing dependencies for the following libraries:

librt.so.0

Makefile:56: recipe for target '/home/hbg/bb/bin/ar71xx/packages/base/iperf_2.0.9-1_ar71xx.ipk' failed

make[3]: *** [/home/hbg/bb/bin/ar71xx/packages/base/iperf_2.0.9-1_ar71xx.ipk] Error 1

make[3]: Leaving directory '/home/hbg/bb/package/network/utils/iperf'

package/Makefile:177: recipe for target 'package/network/utils/iperf/compile' failed

make[2]: *** [package/network/utils/iperf/compile] Error 2

缺少了依赖库文件 librt.so

将其添加到makefile中的依赖文件中,修改内容如下：

define Package/iperf

  SECTION:=net

  CATEGORY:=Network

  DEPENDS:= $(CXX_DEPENDS) +libpthread +librt

  TITLE:=Internet Protocol bandwidth measuring tool

  URL:=http://sourceforge.net/projects/iperf2/

endef

即可编译成功，完成iperf 2.0.5到iperf 2.0.9的替换，完美解决iperf  2.0.5异常退出等bug。

备注：

在此替换过程中，出现过一个小的失误，就是添加librt时，写成如下：

define Package/iperf

  SECTION:=net

  CATEGORY:=Network

  DEPENDS:= $(CXX_DEPENDS) +libpthread  + librt    // 此处‘+’ 和 ‘librt’ 之间多了一个空格

  TITLE:=Internet Protocol bandwidth measuring tool

  URL:=http://sourceforge.net/projects/iperf2/

endef

导致make menuconfig 时无法显示 iperf 选项。