Here are the instructions I have created so far:
Install the necessary dependencies
pacman -S boost boost-libs openssl db base-devel qrencode qt4 automoc4
Clone the GitHub repository:
git clone https://github.com/bitcoin/bitcoin.git cd bitcoin
Checkout the Git source to the latest release listed at https://github.com/bitcoin/bitcoin/releases:
git checkout v0.8.5
Change to the source directory:
cd src
Compile Bitcoin-Qt from source
qmake-qt4 -makefile -Wall USE_QRCODE=1 make
There are a ton of generic instructions spit out when I enter qmake-qt4 command and then upon entering the make command I am told:
make: * No targets specified and no makefile found. Stop.
FYI, I am using the PKGBUILD file as a guideline for creating the above instructions.