试验MT7620A路由器OpenWRT系统软件开发时遇到了如下的问题：
[admin@localhost OpenWrt-SDK-ramips-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2]$ make
Collecting package info: done
tmp/.config-package.in:7:error: recursive dependency detected!
tmp/.config-package.in:7: symbol PACKAGE_helloworld depends on PACKAGE_libpthread
Config-build.in:1745: symbol PACKAGE_libpthread is selected by PACKAGE_helloworld
#
# configuration written to .config
#
make[1] world
make[2] package/compile
make[3] -C package/helloworld compile
make[2] package/index
看意思是引用的libpthread导致了递归依赖问题，检查hellowolrd中的Makefile，Depends属性是这样设置的：
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