Installing on Arch Linux, from the AUR
(if you too get the error : integrity checks are missing)
Download the PKGBUILD file for freqtweak version that matches with your CPU architecture, cd to the place where you saved it and run makepkg with the -g option like this:
makepkg -g >> PKGBUILD
Then run makepkg again, and sudo pacman -U freqtweak-x86_64-0.6.1-2-x86_64.pkg.tar.gz to install the package.
(The version of freqtweak might be different when you build it)
To get rid of the error:
freqtweak: error while loading shared libraries: libpng12.so.0: cannot open shared object file: No such file or directory
Solution: Download the PKGBUILD file for libpng12, cd to the folder where you downloaded it and do makepkg
As usual, installing is done with sudo pacman -U libpng12.ur..verzzzion..ur..aaahhhrchitecture.pkg.tar.gz
Next error:
freqtweak: error while loading shared libraries: libjpeg.so.62: cannot open shared object file: No such file or directory
Solution: Download PKGBUILD and the other files of libjpeg6 6b-9 from the AUR and install just the same way as explained for libpng12 above.
After fixing these errors, freqtweak runs fine (if Jack is running ;-).