MT7620A 编译过程on gentoo_mt7620编译工具-优快云博客

本文链接：https://blog.youkuaiyun.com/bencodeben/article/details/50760271

这篇博客介绍了如何在Gentoo系统中编译MT7620A，涉及Gentoo版本选择、内核配置、LZMA和mksquashfs的安装。强调了LZMA版本兼容性问题，以及可以使用gzip替换LZMA压缩内核镜像的方法。

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准备流程：

找到 RT288x_SDK 工具并解压，查看 RT288x_SDK\doc 内的文档，以下内容根据 MTK_APSoC_SDK_User_Manual.pdf 和谷歌搜索得到
所有操作均在gentoo下完成

1.安装编译工具

1.1安装toolchain

cd /opt
cp RT288x_SDK/toolchain/buildroot-gcc342.tar.bz2 /opt
tar jxfp buildroot-gcc342.tar.bz2
cp RT288x_SDK/toolchain/mips-2012.03.tar.bz2 /opt
tar jxfp mips-2012.03.tar.bz2

1.2安装LZMA和mksqashfa

#gentoo版本

emerge -av app-arch/lzma
echo "sys-fs/squashfs-tools lzma" >> /etc/portage/package.use/10-squashfs-tools
emerge -av sys-fs/squashfs-tools

#gentoo内核配置

#Enabling SquashFS 4.0 support
File systems —>
[*] Miscellaneous filesystems —>
[*] SquashFS 4.0 - Squashed file system support

#Enabling optional features of SquashFS
File systems —>
[*] Miscellaneous filesystems —>
File decompression options (Decompress file data into an intermediate buffer) —>
Decompressor parallelisation options (Single threaded compression) —>
[*] Squashfs XATTR support
[*] Include support for ZLIB compressed file systems
[*] Include support for LZ4 compressed file systems
[*] Include support for LZO compressed file systems
[*] Include support for XZ compressed file systems
[*] Use 4K device block size?
[*] Additional option for memory-constrained systems
(3) Number of fragments cached

#手册要求的lzma版本

pushd RT288x_SDK/toolchain/
tar xvpf lzma-4.32.7.tar.gz
cd lzma-4.32.7
./configure
make && make install
popd

#可以用gzip代替lzma来压缩内核镜像，通过改变RT288x_SDK/source/vendors/Ralink/{Platform}/Makefile中的“COMP=gzip”

#lzma算法不向后兼容，即新版本不支持旧版本

1.3安装mksquashfs
Uboot编译