How to switch between gcc versions and install QEMU
I recently migrated my laptop to Gentoo Linux. I think it will serve me well as in introduction to inside of Linux and explore how things operate and build in there. But sometimes I have to work in Windows, for that I used QEMU.
It’s a great tool, however it needs to be compiled with gcc 3 while in the recent Gentoo Linux it comes with gcc-4.1.2.
So, first install gcc 3, type:
emerge =sys-devel/gcc-3.4.6* -av
You can take a look at your gcc config file and see your correct gcc 3 version and architecture in /etc/env.d/gcc folder
My laptop has i686-pc-linux-gnu-3.4.6 So I type:
gcc-config i686-pc-linux-gnu-3.4.6
Then update my profile:
source /etc/profile
Now, you might need to unmask these stuff, type in:
echo “app-emulation/qemu” >> /etc/portage/package.keywords
echo “app-emulation/qemu-user” >> /etc/portage/package.keywords
echo “app-emulation/qemu-softmmu” >> /etc/portage/package.keywords
echo “app-emulation/kqemu” >> /etc/portage/package.keywords
echo “>=app-emulation/qemu-0.8.2″ >> /etc/portage/package.mask
echo “>=app-emulation/qemu-user-0.8.2″ >> /etc/portage/package.mask
echo “>=app-emulation/qemu-softmmu-0.8.2″ >> /etc/portage/package.mask
If you want graphical output, enter the following in /etc/portage/package.use
app-emulation/qemu-softmmu sdl
So when you are ready, install QEMU by typing:
emerge qemu -av
QEMU is also helpful for Windows users to get to know Linux without really installing it on their PCs. It will run Linux inside your Windows. It gives you a chance to use Linux before migrating.
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Welcome to Arstan's personal blog. This blog includes tips on Linux, Apache, MySQL, Shell Scripts. Hardware/software and internet technologies reviews and updates.
