[Gem5] GEM5 Installation on ubuntu 14

Just follow steps below:

step1: sudo apt-get update; sudo apt-get upgrade

step2: sudo apt-get install mercurial scons swig gcc m4 python python-dev libgoogle-perftools-dev g++

step 3: hg clone http://repo.gem5.org/gem5

step 4: cd gem5/

step5: scons build/ARM/gem5.opt -j2

step6: build/ARM/gem5.opt configs/example/se.py -c tests/test-progs/hello/bin/arm/linux/hel

­lo

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While running the command scons, below error may occur:

scons build/ARM/gem5.opt

 scons: *** No SConstruct file found.

 File "/usr/lib/scons/SCons/Script/Main.py", line 834, in _main

---> one of the solution to get rid of that error is to define environment variable as below:

export PATH=/opt/local/bin:/opt/local/sbin:$PATH

If you encounter the error something like missing "zlib-dev", etc. Then just install it by command:

sudo apt-get update
sudo apt-get install zlib1g-dev

after that, try to re-run  "scons build/ARM/gem5.opt". Be careful with option -j2 if your RAM is less than 4Gb.