*** Compiling root ................ 
Copied rootconfig.sh ......................
Configure Root ..........................................
linuxx8664gcc
./rootconfig.sh: line 27: [: too many arguments
Checking for source directory ... /home/fairroot/fairsoft_sep12/tools/root
Configuring for linuxx8664gcc
INFO: --enable-xml: already enabled by default.
Checking for GNU Make version >= 3.80 ... ok
Checking for C compiler ... gcc
Checking for C++ compiler ... g++
Checking for linker (LD) ... g++
Checking for F77 compiler ... gfortran
Checking for libX11 ... no
configure: libX11 MUST be installed
See http://root.cern.ch/drupal/content/build-prerequisites
Makefile:20: config/Makefile.config: No such file or directory
Makefile:29: config/Makefile.comp: No such file or directory
Makefile:40: *** Please run ./configure first.  Stop.
Makefile:20: config/Makefile.config: No such file or directory
Makefile:29: config/Makefile.comp: No such file or directory
Makefile:40: *** Please run ./configure first.  Stop.
**** Checking libraries in /home/fairroot/build_FairSoft_Sep12//lib ****
*** ERROR: root could not be created.
*** End installation of external packages with Errors***