[gmx-users] errors during installation

[Jaimin Shah]

Dear users,
I am a novice to both Linux and Gromacs. I am trying to install Gromacs on
my Linux PC and for that, I have installed FFTW-2.1.5. However, when I
give the last command "make install", I get the following error message:

[guest at localhost fftw-2.1.5]$ make install
Making install in fftw
make[1]: Entering directory
`/home/guest/Jaimin/gromacs-3.0.1/fftw-2.1.5/fftw'
make[2]: Entering directory
`/home/guest/Jaimin/gromacs-3.0.1/fftw-2.1.5/fftw'
/bin/sh ../mkinstalldirs /usr/local/lib
 /bin/sh ../libtool --mode=install /usr/bin/install -c  libfftw.la
/usr/local/lib/libfftw.la
/usr/bin/install -c .libs/libfftw.lai /usr/local/lib/libfftw.la
/usr/bin/install: cannot create regular file `/usr/local/lib/libfftw.la':
Permission denied
make[2]: *** [install-libLTLIBRARIES] Error 1
make[2]: Leaving directory `/home/guest/Jaimin/gromacs-3.0.1/fftw-2.1.5/fftw'
make[1]: *** [install-am] Error 2
make[1]: Leaving directory `/home/guest/Jaimin/gromacs-3.0.1/fftw-2.1.5/fftw'
make: *** [install-recursive] Error 1

Now, when I give the follwoing command:
[guest at localhost gromacs-3.0.1]$ ./configure --enable-float

I get the following message:

checking for fftw.h... no
checking for sfftw.h... no
configure: error: Cannot find any single precision fftw.h or sfftw.h
Do you have single precision FFTW installed? If you are using packages,
note that you also need fftw-devel to compile GROMACS. You can find the
software at www.fftw.org, and detailed instructions at www.gromacs.org.

Can someone please guide me out?
Thanking you,

Sincerely,
Jaimin Shah
Junior Research Fellow
Dr. Dulal Panda's Laboratory
School of Biosciences & Bioengineering
I.I.T. Bombay