Python support for GDB at Ubuntu14.04_64

Hello,

I followed this tutorial to install your excellent arm-none-eabi-gcc and it works perfect to compile and flash:
http://istarc.wordpress.com/2014/07/06/stm32f4-in-circuit-debugging/
So I'm using Terry Guo's PPA package sucessfully at Ubuntu 14.04 64bit but have never debugged my STM32F4 Discovery Board.

Instead of Eclipse I would strongly prefer to use QTCreator (because all my other QT projects need it) and I tried to get arm-none-eabi-gdb to work.
So I followed this tutorial:
https://groups.google.com/forum/#!msg/phoenixpilot/caJ5HvN9h-g/Wpff-8X0uscJ
I can set everything up successfully and come to the point where I want to remote-connect to my running OpenOCD Server.
My problem is that I get the Error that my current GDB was built without Python support.

I found this question:
https://answers.launchpad.net/gcc-arm-embedded/+question/218684
So I wanted to rebuild gcc-arm-embedded from source with python support but failed.

Even without modifying build-toolchain.sh (remove =no at --with-python) I can't build and get:
make[4]: *** [as.info] Error 1
make[3]: *** [install-am] Error 2
make[2]: *** [install-recursive] Error 1
make[1]: *** [install-gas] Error 2
make: *** [install] Error 2

I called it like this:
./build-toolchain.sh --skip_mingw32 > build_log.log
and the log is HUGE. Here are the last lines:

make[3]: Leaving directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas/po'
make[3]: Entering directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas'
make[4]: Entering directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas'
/bin/bash /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/src/binutils/gas/../mkinstalldirs /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/bin
 /bin/bash ./libtool --mode=install /usr/bin/install -c as-new /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/bin/arm-none-eabi-as
libtool: install: /usr/bin/install -c as-new /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/bin/arm-none-eabi-as
/bin/bash /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/src/binutils/gas/../mkinstalldirs /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/arm-none-eabi/bin
n=`echo as | sed 's&^&arm-none-eabi-&'`; \
 if [ "/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/bin/$n" != "/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/arm-none-eabi/bin/as" ]; then \
   rm -f /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/arm-none-eabi/bin/as; \
   ln /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/bin/$n /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/arm-none-eabi/bin/as >/dev/null 2>/dev/null \
     || /bin/bash ./libtool --mode=install /usr/bin/install -c as-new /home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/install-native/arm-none-eabi/bin/as; \
 else \
   true ; \
 fi
make[4]: Nothing to be done for `install-data-am'.
make[4]: Leaving directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas'
make[3]: Leaving directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas'
make[2]: Leaving directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils/gas'
make[1]: Leaving directory `/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/build-native/binutils'

Is this what you would expect because I tried the plain GNU Tools for ARM Embedded Processors under Ubuntu without Terry Guos modufication? This was my assumption.

So I downloaded the source from https://launchpad.net/~terry.guo and replaced the original files in
/home/dl/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805/src
with Terrys. Again WITHOUT changing any script to enable Python I still can't build:
./build-prerequisites.sh fails:
checking whether cc is gcc... yes
checking compiler cc -m32 -O2 -pedantic -fomit-frame-pointer -fexceptions... no
checking compiler cc -O2 -pedantic -fomit-frame-pointer -fexceptions... yes
checking compiler cc -O2 -pedantic -fomit-frame-pointer has sizeof(long)==4... no
configure: error: could not find a working compiler, see config.log for details

I'm not sure what that means but I have gcc:
dl@dl-SVP1321C5E:~/gcc-arm-none-eabi-src/gcc-arm-none-eabi-4_8-2014q3-20140805$ gcc --version
gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2

I'm completly stuck.

Was my approach the right way? What is an easy way to get Ubuntu-compatible ARM ToolChain with python?

Many many thanks for reading and any help!