HowTo install g95 fortran compiler

[derjames]

Hello there,
I was looking for info about g95 fortran compiler in Ubuntu, however I found nothing, you can install very quickly g77 using the instruction from the following wiki

https://wiki.ubuntu.com/InstallingCo...%28compiler%29

however some people do prefer g95 and this is not included in the synaptic list, so if you plan to use it for whatever reason use the following instructions:

1. enter to g95 project page

http://g95.sourceforge.net/

2. download the binary (g95-x86-linux.tgz for the x86 platform In my caseor download the right binary for your system)

3. create a new directory which will hold the uncompressed file, in my case is (for example)

/etc/g95

use sudo if necessary

4. copy the downloaded file to this new location
5. untar the file using

tar -xzvf g95-x86-linux.tgz

6. The executable is located in

/etc/g95/g95-install/bin/i686-pc-linux-gnu-g95

7. Since this directory is not included in the PATH environment variables a link to this file have to be generated, there are to ways to do this (1) to use 'export' that location to the PATH using export or (2) create a symbolic link, the latter will be used.

8. A symbiolic link is a reference to an existing file from a new created file, you have to use the command 'ln'

the syntax is as follows

ln -s ExistingFileName NewLinkName

where -s indicates that a symbolic link will be created between the to files

for my case this would be

ln -s /etc/g95/g95-install/bin/i686-pc-linux-gnu-g95 /bin/g95

you can see that the new link is the file g95 located at /bin so when you call the compiler, the computer will look first at /bin then will locate g95 but g95 is just a link to the real executable file which is located at

/etc/g95/g95-install/bin/i686-pc-linux-gnu-g95

Why do we do this?, because /bin is already located in the PATH environment variables. Type

echo $PATH

to confirm this

After this you will be able to run g95, use

g95 --help

for more info

Cheers