Torch install failed on Ubuntu 14.04

[ghost]

I tried to install Torch7 on ubuntu14.04 according to the official guide but when I typed command cd ~/torch; ./install.sh, I always received the following error:
Thanks in advance

root@andrew:~/torch# cd ~/torch; ./install.sh
Prefix set to /root/torch/install
Installing Lua version: LUAJIT21
CMake Error at /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:61 (message):
The C compiler "/usr/bin/cc" is not able to compile a simple test program.

It fails with the following output:

Change Dir: /root/torch/build/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec3255080616/fast"

/usr/bin/make -f CMakeFiles/cmTryCompileExec3255080616.dir/build.make
CMakeFiles/cmTryCompileExec3255080616.dir/build

make[1]: Entering directory `/root/torch/build/CMakeFiles/CMakeTmp'

/usr/bin/cmake -E cmake_progress_report
/root/torch/build/CMakeFiles/CMakeTmp/CMakeFiles 1

Building C object
CMakeFiles/cmTryCompileExec3255080616.dir/testCCompiler.c.o

/usr/bin/cc -o CMakeFiles/cmTryCompileExec3255080616.dir/testCCompiler.c.o
-c /root/torch/build/CMakeFiles/CMakeTmp/testCCompiler.c

Linking C executable cmTryCompileExec3255080616

/usr/bin/cmake -E cmake_link_script
CMakeFiles/cmTryCompileExec3255080616.dir/link.txt --verbose=1

/usr/bin/cc CMakeFiles/cmTryCompileExec3255080616.dir/testCCompiler.c.o -o
cmTryCompileExec3255080616 -rdynamic

/usr/bin/ld: cannot find crt1.o: No such file or directory

/usr/bin/ld: cannot find crti.o: No such file or directory

/usr/bin/ld: cannot find -lgcc_s

collect2: ld returned 1 exit status

make[1]: *** [cmTryCompileExec3255080616] Error 1

make[1]: Leaving directory `/root/torch/build/CMakeFiles/CMakeTmp'

make: *** [cmTryCompileExec3255080616/fast] Error 2

CMake will not be able to correctly generate this project.
Call Stack (most recent call first):

[fernandoc1]

According to the line:
The C compiler "/usr/bin/cc" is not able to compile a simple test program.
It seems that your /usr/bin/cc is not pointing to a valid C/C++ compiler. So test your C compiler before installing Torch.