Compile QEMU in ubuntu 14.04

To compile QEMU in ubuntu 14.04, you need to download the needed libraries first

sudo apt-get install zlib1g-dev libglib2.0-dev autoconf automake libtool

If you need to browse the execution screen via a window in host instead of using VNC, you will need to install gtk.

sudo apt-get install build-essential libgtk2.0-dev libvte-dev

Then command ./configure --target-list="What you desire" --enable-gtk.

ex: ./configure --target-list="x86_64-softmmu" --enable-gtk

Then command make, and it will make the files in some directory, ex:"x86_64-softmmmu".
Btw, you can use -j8 to accelerate with 8 threads,' there is no space between 'j' and8', unlike compiling linux kernel.