[Embedded] Compiler Qemu on Mipsel board

嘗試使用廠商提供的toolchain來Compiler Qemu，發生如一堆問題，如

a. toolchain don't support

ERROR: User requested feature nptl
                configure was not able to find it 

b. 缺少 net header

...  warning: ifaddrs.h: No such file or directory
or
... undefined reference to `getifaddrs`
or
... undefined reference to `freeifaddrs` 

c. 缺少 library

pixman / gettext / libiconv / glib / uclibc ......

如果你的tool chain缺少如此多的library，我想最快的解決方法應該是rebuild tool chain。Qemu非常依賴uClibc的版本，所以選擇buildroot (uClibc官網建議)來做 tool chain。

1. buildroot-2014.02  (備份)

wget http://buildroot.uclibc.org/downloads/buildroot-2014.02.tar.bz2

tar -jxvf buildroot-2014.02.tar.bz2

cd buildroot-2014.02

make qemu_mipsel_malta_defconfig

make menuconfig ( See : 2. Set .config )

make (若發生found not mipsel-linux-pkg-config , then See : 4. Note )

2.  Set .config (備份)

• [Target options] -> [ Target Architecture (MIPS (little endian))
• [Target options] -> [ Target Architecture Variant (mips 32r2) ]
• [Toolchain] ->
• <*> Enable large file (files >  2 GB) support
• <*> Enable IPv6 support
• <*> Enable WCHAR support
• [Thread library implementation (Native POSIX Threading (NPTL))]
• [Target packages] -> [Libraries] ->
•  [Compression and decompression] ->
• <*> zlib
•  [Graphics] ->
• <*> pixman
•  [Networking] ->
• <*> glib-networking

3. build qemu-1.7.0 (備份)

tar -jxvf qemu-1.7.0.tar.bz2

cd qemu-1.7.0

./configure  --cross-prefix=/opt/buildroot-2014.02/output/host/usr/bin/mipsel-linux-  --prefix=/home/qemu-mipsel

make; make install

4. Note : 直接使用x86 pkg-config即可 ( Ex : ln -s /usr/bin/pkg-config /opt/buildroot-2014.02/output/host/usr/bin/mipsel-linux-pkg-config )

Reference:
[1] uClibc
[2] buildroot
[2] qemu