uboot/linux/busybox/yaffs2源代码下载地址

uboot:

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http://ftp.denx.de/pub/u-boot/  
linux:

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http://www.kernel.org/  
busybox:

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http://www.busybox.net/downloads/  
yaffs2:下载YAFFS文件系统源代码需要首先安装Git 工具(yum install git)，安装好git工具后，切换到你想保存源代码的路径，直接执行：git clone git://www.aleph1.co.uk/yaffs2

qt源代码:

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http://qt-project.org/downloads#qt-creator  
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<a href="ftp://ftp.qt-project.org/qt/source/">ftp://ftp.qt-project.org/qt/source/</a>