Compiling from Source (f83f8b9), Ubuntu 12.04, Qt 5.2, Requiring -fPIC for PCH all.h

Hello,

I am attempting to build Musescore from source. I was able to follow the instructions for the most part, but I had to modify a few things:

I installed gcc-4.8, but I am doing development on other things that I do not wish to interfere with, so I made my own 'atlernatives' folder.

#!/bin/bash

mkcd () { mkdir "$@" && cd "${!#}"; } # Separate arguments so that -p can be used
# Symlinks into custom alternatives
mkcd -p ~/local/bin/alternatives
ln -s /usr/bin/g*-4.8 .
rename 's#(.*)-4.8#$1#g' *

# Update environment variables
export PATH=~/local/lib/Qt-5.2/5.2.1/gcc_64:~/local/bin/alternatives:$PATH

# Install additional dependencies
sudo apt-get install libsndfile1-dev
sudo apt-get install libjack-jackd2-dev # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695550
# Use y-ppa-manager to fix any missing GPG keys

# Configure cmake
cd ~/devel/third/MuseScore
mkcd -p build.release
cmake .. -DCMAKE_CXX_COMPILER=$(which g++) -DCMAKE_C_COMPILER=$(which gcc)

I am able to run CMake where the only warning is: "optional package portaudio-2.0 Version 19 not found (package portaudio19-dev)"

Once I try to build, I dies when compiling the PCH "all.h", with Qt 5.2 invoking an #error because of an -fPIC flag: (trimming output via regex: "s/-I(.*?)\s(?=-)//g")

$ make VERBOSE=1
Generating all.h.gch
[ 0%] /home/eacousineau/local/bin/alternatives/g++ -x c++-header -g -DQT_DISABLE_DEPRECATED_BEFORE=0 -DQT_DISABLE_DEPRECATED_BEFORE=0 -o all.h.gch all.h
Built target genManual
In file included from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/qnamespace.h:45:0,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/qobjectdefs.h:45,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/qobject.h:48,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/qabstractanimation.h:45,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/QtCore:4,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtGui/QtGuiDepends:2,
from /home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtGui/QtGui:3,
from all.h:32:
/home/eacousineau/local/lib/Qt-5.2/5.2.1/gcc_64/include/QtCore/qglobal.h:1008:4: error: #error "You must build your code with position independent code if Qt was built with -reduce-relocations. " "Compile your code with -fPIC or -fPIE."
# error "You must build your code with position independent code if Qt was built with -reduce-relocations. "\
^
make[2]: *** [all.h.gch] Error 1

I tried going through and haphazardly adding -fPIC flags in (see patch here), but I could not get the flag to appear...

(For those who wish to reproduce these results, I tried finding the right locations by searching and opening the files)

find . -path '*/build*' -prune -o \( -name 'CMakeLists.txt' -o -name '*.cmake' \) -print | xargs grep 'PCH_INCLUDE' --color -nom1 | xargs sublime -n

Does anybody have some suggestions on how I might resolve this?
Thanks!
- Eric