[gmx-users] Regarding installation problem

[SOUVIK MONDAL]

Hi
  I have found the following problem regarding gromacs 5.1.2 installation. I have installes cmake and ffftw before. Can you help me out?
-- Configuring incomplete, errors occurred!


See also "/root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeOutput.log".
See also "/root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeError.log"

when I opened that two log files it shows 
Performing C SOURCE FILE Test CFLAGS_EXCESS_PREC failed with the following output:
Change Dir: /root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/gmake" "cmTC_bf3f2/fast"
/usr/bin/gmake -f CMakeFiles/cmTC_bf3f2.dir/build.make CMakeFiles/cmTC_bf3f2.dir/build
gmake[1]: Entering directory `/root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_bf3f2.dir/src.c.o
/usr/bin/cc    -DCFLAGS_EXCESS_PREC -fexcess-precision=fast   -o CMakeFiles/cmTC_bf3f2.dir/src.c.o   -c /root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeTmp/src.c
cc1: error: unrecognized command line option "-fexcess-precision=fast"
gmake[1]: Leaving directory `/root/Downloads/gromacs-5.1.2/build/CMakeFiles/CMakeTmp'
gmake[1]: *** [CMakeFiles/cmTC_bf3f2.dir/src.c.o] Error 1
gmake: *** [cmTC_bf3f2/fast] Error 2

Source file was:
int main(void) { return 0; }
Performing C++ SOURCE FILE Test CXXFLAGS_EXCESS_PREC failed with the following output:
"CMakeError.log" 624L, 40593C