All standard and many vendor-specific legacylanguage features are supported, so that Fortran projects may be any combinationof Fortran 77, Fortran 90 and Fortran Some features of Fortran and have been added. There is a free personal edition. The following is a list of Fortran compilers that seem discontinued, so we donot list them above:. Please let us know if there is any compiler that is not listed, or if we listeda compiler in the Discontinued section and it is in fact actively maintained.
The following commercially available compilers are presently supported:. If you have installed the Free Edition with your MyCentre account, the GFortran compiler is available as a separate download.
Also, has shown to provide EMTDC runtime executables that are significantly faster than those built by its predecessor Intel Visual Fortran 9 to 11 ; in some cases twice as fast. GFortran 4. This tutorial has been prepared for the beginners to help them understand basic Fortran Programming. After completing this tutorial you will find yourself at a moderate level of expertise in Fortran from where you can take yourself to next levels. This tutorial is designed for Fortran students who are completely unaware of Fortran concepts but they have basic understanding on Programming training.
Skip to content Home. I'm toying with the idea of not even installing X windows. Been sick all weekend. To add insult to injury, I've been back toupgrade hell, this time with the new disk. This time was worse,because I use the laptop as a dual boot system with windows and linux.
Spent yesterday in my reduced capacity trying to install windows. The laptop came with OEM installation disks for windows. Because thedisks are OEM, they weren't particularly polished, and thepartitioning part didn't work. Because I have the arch linux disk, Icould easily look and set the partitions. The OEM would install,finish, reboot the system I tried and tried and tried. Half an hour to go through the whole3-CD install and I must have done it a dozen times.
The key was therealization that the installation software expected an NTFS partitionand wouldn't even mark it bootable after it ran. Ergo, the OEMsoftware expected the partition to already be in a particular state,more than just a bootable flag. I ended up installing an even olderwindows , to where it would boot itself, then wiped it with theOEM XP.
It worked-- win2k must have installed a part of the bootstraploader that the OEM installed wasn't. Of course, once windows is going, it's time to get unix going. Thereason is that unix can live on other partitions and its installertakes care of snarfing up the windows boot code, doing the dual bootthing.
The Arch Linux installation wentsmoother than usual, the third time being the charm. Arch does havethis problem with downloads getting stalled and being downright passiveabout retrying stalled downloads.
After the nth try, I got the basicinstall done. The nasty surprise was on the first boot. The kernelcame up, the first couple of items in the initialization scripts ran,the screen went blank and stayed that way. Now this was a fine pickle. The only way to go from here was to bootfrom the CD, mount the drive, edit the startup scripts and reboot. The CD wasn't real reliable on the laptop, making the whole processvastly more irritating that it would normally have been.
Thoughtabout giving up, but the CD worked fine, if the laptop saw it. Eventually tracked the problem to something in the udev demon. Aftersome head-scratching, I guessed that udev was forcing some buggymodule to load.
After guessing wrong with some manufacturer-specific modules, it hitme-- if the screen is going blank, the problem must be in a screendriver. But how to list modules on a system without a screen? Why,over the network of course.
Small problem, though, the base installdoesn't include things like sshd, and you can't see what you'retyping, so you can't log in remotely! So, how to fix that. Turned I out I had a copy of the telnetd sourcecode. It's small, about 2k lines of C. Compiled it on my desktopsystem, scp'ed it up to the g95 website. Loged into the laptop,blindly, carefully typed a wget command, then chmod it to make itexecutable, then run it.
Try telnet from the desktop and whattayaknow, it worked the first time. Login as root, permission denied. Gotta love these modern security measures. The only way aroundthat one was a user account. Had to create a user account on thelaptop, typing blind again. With a working telnetd, I finally got to do an lsmod, and it turnedout that there was indeed a display driver, i being loaded.
Iblacklisted the module and things worked a lot better. It wasdownhill after that, just regular installation of things that aren'tthere. Upgrading windows went smoother-- you just let theupdater tell you about the critical security flaws, download, installand reboot. Repeated that four times before it go to SP2.
That wentin and it doesn't want to move on to SP3 for some reason. Very nice. I've got skype, putty,wireless networking and am on my way. Not bad for an otherwise wasted day. I've been more lucid for aboutfive hours now and hopefully got this cold licked. Got all of the data off of my laptop. Even if I'd lost it, thedifference between what was there and the most recent backup wouldhave been trivial to redo.
I have a new disk for the laptop, but havebeen battling a cold the whole weekend. No build today. I was working away on g95 when I noticed the harddrive on my laptop where g95 lives started making bad noises. Checked the logs and read errors are starting to happen.
Time for anew drive. So I've shut down for the night to cool it off. Firstthing tomorrow, I'll power it up and copy everything off of it.
Sameprocedure as the usual backup, except I'll skip compression to geteverything off as fast as possible. The laptop and drive are years old, so it's not that unexpected. I actually have new keyboard on the way, since several of the keysdon't work so well. Got that done now. Christian Speckner sent in a problem with procedure pointers ininternal procedures that has been fixed.
John McFarland sent in another problem with abstract interfaces. Thistime, the problem was that the abstract attribute wasn't beingpropagated through modules. This necessitated a change in the moduleversion-- the new modules produced by g95 won't work with previousversions.
John McFarland sent in another unique regression with abstractprocedure pointers that has been fixed. My John's original problemwas a little too broad, but we're getting there. Michael Richmond helped clear up a lot of confusion in the variouscoarray packages. On top of all that, the SMP version was not beingcompiled into the xlinux build.
Reinhold Bader continued the SMP coarray shakedown with a problem withallocatable coarrays in single-image mode and some addressingweirdness on IA Both fixed.
Michael Richmond and I were getting pretty confused about versionnumbers, until we realized that the version numbers were notpropagating into the library version number. John McFarland sent a crash on an illegal procedure pointerdeclaration that has been fixed. John also sent a correct programthat was giving spurious errors for a procedure pointer assignment,also fixed.
Doug isdiscontinuing the builds against gcc 4. I've fixed the web page on the sourceforge site. Normally this iskept automatically in sync with www. Sourceforge now has the new key. John Reid sent in another bug with SMP coarrays that has been fixed. This one had to do with passing coarrays though dummy arguments. Thanks Johan! Itwon't all go for beer-- Four Peaks has delicious beer bread that Iam partial to. Pedro Lopes and Delbert Franz reported that the new Debian packagedidn't.
I had to change the upload script, and some status messagswere intermingled with the archive itself. Reinhold Bader and I were discussing a bug that seems to havevanished. Reinhold did supply several libraries that have enabled meto build the coarray console on IA64 again. The gateway machine atReinhold's institute is a core IA There are rules against usingit for computation, but it was 0-dark-thirty, and it was cool to runthe monte carlo pi calculation on all 16 cores.
I've also decided that the 'g95' name is getting tooantiquated. From now on, it will now be known as 'h96'. Doug Cox built some new Debian packages.
Michael Richmond sent in the necessary files to update the alpha buildfrom Debian 4. Things went smoothly. Since it was linux, itwas easy to add support for the SMP coarrays. John Reid all hail the convener , sent in a problem with the SMPcoarray implementation. Writes by separate images to standard outcan't overlap the records that they write, so there needs to be amutex on standard output. The network version multiplexes the outputin a different way, leaving a lock unnecessary in that case.
John also sent another problem with allocatable coarrays that has beenfixed. Elliott Estrine pointed out that the new linux build was againstglibc I'veswitched the linux build back to glibc John Harper sent in a problem with the solaris build-- the solarislinker complains about unaligned debugging relocations. Fixed bycompiling without debugging symbols. John lives in New Zealand-- the new version of pine that I'm now usinglists the date on his mails correctly as 'tomorrow'.
Martien Hulsen, Maarten Becker and Michael Richmond reported a problemwith the x being unable to find the system startfiles likecrt1.
This was an oversight on my part-- the x build iscompiled using my own x system which runs a newArch Linux distribution. Firmly stuck in mail hell today. I thought I had the mail set up, butwhen I download a letter, it gets appended to mailbox in a differentformat than the other letters-- the 'new' format involves the list ofthe servers that the mail has passed through, and that doesn't quitejibe with the mbox format.
I thought I'd lost the last couple ofletters, but they just appear glued onto the last message that pinethinks is there. No clue on this one for now. Update-- I found formail Mail is just a hideoushideous problem. You get to be an expert at it when you get yoursystem going, then forget everything you learned and have to re-learnit when you upgrade your system I've unfortunately deluded myself about the state of my mail setup.
I neglected my spam filter of choice,popfile. I can send, but can'tquite get mail correctly yet. I've finished the 2. It does all thatthe previous one did and much more. It's doubled in size, from athousand lines of python to just under two thousand. The old onebuilt by forking a subprocess for each build, logging into remotemachines, building g95 and uploading the result.
This capability isstill intact, but I am now relying much more on local cross compiles. A 'cross compiler' is a compiler that runs locally on one machine, andcompiles a program meant to run on another machine, the 'target'machine.
Cross compilers are tricky to build, and require a lot ofinsight. At the end, even a relatively easy build was taking aboutthree to four hours to complete. I now have nearly a dozen of these,and they build g95 just fine, except for a couple systems I don'tquite have access to. A few systems remain as remote builds for now. It's impressive to watch a full build taking place. The completebuild takes about the same time as it did before, the slowdown notcoming from a particularly slow legacy machine, but from the sheervolume of simultaneous processes running.
The load average peaksaround eight, memory usage increases by about a hundred and fifty megsor so. By modern standards, cheap. A minor sub-innovation I'm pleased with is in the creation of thetarballs themselves.
The tar format is quite simple and instead ofputting everything into a temporary directory structure and running'tar', the structure of the tarball is instead described by a datastructure, which is traversed to create the tarball. Compiling up atarball, if you will. This approach avoids a lot of unnecessarycopying of files all over the place, lets me create the 'owner' of thefiles as 'g95' without actually having a 'g95' user on the system,makes all the timestamps identical and creates symbolic links out ofnothingness.
The gzip process is still done with 'gzip', though. The new build system also integrates another new feature-- SMP-onlycoarray support. This version won't operate over networks, but it isfree for use by anyone and is in the new version. There is currentlya limit of 32 images hardcoded into the library, but I would be happyto compile another version if anyone is using some monster system.
Iwill probably remove the limit sometime soon-- it just makes the firstversion easier. Other unixes shouldn't be that difficult. I am planning a similarversion for windows machines. I started with a copy of the unixlibrary and have started work on the port, although there are so manychanges that calling it a 'rewrite' is probably more accurate.
I'vespent quite some time poring throughmsdn and have figured out how todo everything. It's pretty much the same-- the coarrays are stored inshared memory, pipes and mutexes will be used for the varioussynchronization primitives. The orginal process spawns all of theimages and so on. This also required a change in how gcompiled programs handle thecommand line, since that is the easiest way to specify the number ofimages you want.
As it was, the special command line argument --g95caused a printout of the fortran runtime settings to be printedinstead of running your program. Now, the --g95 signals the start ofarguments that you want to pass to the runtime library.
The specialargument -- indicates that all following arguments should be passed toyour program. If a --g95 is given and no additional arguments aregiven, then the runtime variable settings are printed. I was running the monte carlo caluclation of pi in thecompendium on ox, my quad core xeon system. Things were going just fine for about ten minutes, until I heard thateuropean two-tone police siren noise and the flashing red LED that oxdoes when it is getting a little too hot.
I had set the fan on thelowest setting for noise abatement reasons, and the fan does go to thenext level when things get hot, but with all four cores going at once,it needed the third level. I also took some time to install thenewfangled CPU temperature monitors. Give it a try today, you only have your bugs to lose.
We like to think that we deliver Fortran the way you want to use it, and out-of-the-box Silverfrost Fortran provides lots of development options. We also know it can be confusing sometimes to see unfamiliar terms, so here is a list of straight-forward questions and their answers:.
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