CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Fortran compiler

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   September 26, 2000, 15:27
Default Fortran compiler
  #1
Arturo Ortiz
Guest
 
Posts: n/a
In order to compile UDS files in fluent 4.5 in W-NT the suggested (demanded)fortran compiler is absoft's. I do not have it and I can`t afford it. I have Compaq's compiler and g77 (free). Is there a way to use other compilers or are we cursed to use absoft's?

thanks
  Reply With Quote

Old   September 26, 2000, 22:02
Default Re: Fortran compiler
  #2
John C. Chien
Guest
 
Posts: n/a
(1). It wouldn't be difficult to e-mail the Fortran source code to Fluent's support engineer for compilation. (2). That's only my personal idea. Why not give it a try?
  Reply With Quote

Old   September 29, 2000, 02:37
Default Re: Fortran compiler
  #3
Greg Perkins
Guest
 
Posts: n/a
I think John's idea is not bad - but I find I need to recompile fairly regularly when developing complex code - other people may be more perfect I suppose.

According to Fluent you can use a compiler which produces compatible object binaries as the Absoft one - which just happens to be fairly expensive.

I thought about testing g77 but then decided for me it really wasn't worth it - since none of our PCs are big/fast enough for my problem anyway.

Like many things - the answer is - if it works, it works and if it doesn't it doesn't. If you get it to work - please let me know.

Greg
  Reply With Quote

Old   September 29, 2000, 11:39
Default Re: Fortran compiler
  #4
John C. Chien
Guest
 
Posts: n/a
(1). Can you borrow an old version of the compiler from friend? or from the support engineers? (2). I mean if you are really doing the important thing, there is always a way out. (just ask the support engineer to lend a copy of an old version of the compiler. It shouldn't be that difficult. You can return it when you are done with your project.) There must be a lot of old versions out there.
  Reply With Quote

Old   September 29, 2000, 20:32
Default Re: Fortran compiler
  #5
Arturo Ortiz
Guest
 
Posts: n/a
As Greg has pointed, Absoft's compiler is quite expensive. I've tried Visual fortran and g77 but fluent refuses to use them even if in the makefile there exists a DVF choice (Digital Visual Fortran)and I have set it active. Absoft's fortran is not used here and I do not know nobody who uses it. I've tried desesperately to get an old version as Jhon says, but I have not had success. Fluent's people told me that absoft's is a must, and their way to handle their bussiness is very restricted so I don't think they will lend me a compiler. I'm still in the search, if somebody has something I will appreciate it very.
  Reply With Quote

Old   September 29, 2000, 21:03
Default Re: Fortran compiler
  #6
John C. Chien
Guest
 
Posts: n/a
(1). Take a look at the absoft website, http://www.absoft.com.

(2). There is a statement by the Assistant Dean for Engineering Computing at the Virginia Tech., that all 1400 freshmen engineering students are required to own absoft c, C++, and Fortran compilers. (under Academic Price List of absoft home page..)

(3). You can post your need at their website (the engineering school). good luck.
  Reply With Quote

Old   October 2, 2000, 08:34
Default Re: Fortran compiler
  #7
andy
Guest
 
Posts: n/a
A possible work around may be to tell Fluent you are using C (which it seems to like more) and to place a C wrapper around your Fortran subroutine. Calling Fortran from C is relatively straightforward if you follow the calling conventions adopted by your C/Fortran combination. These vary a bit from system to system in things like placement of underscores and handling the length of strings. The gcc and g77 info pages give details.

Please post back if it is successful.

  Reply With Quote

Old   October 2, 2000, 17:57
Default Re: Fortran compiler
  #8
Greg Perkins
Guest
 
Posts: n/a
While I haven't compiled any Fluent v4.5 user code under Windows, I have linked my C code to the Fluent Fortran templates for v4.5 using the wrappers you've mentioned. I have done it using f77 and cc under HP-UX (easy) and SGI Irix (painful).

HP-UX provides a nice compiler directive to pass Fortran parameters to C as either value or by reference type. Unfortunately, under SGI Irix I needed to use wrappers generated in the make process. This took a while to get working.

Regards Greg
  Reply With Quote

Old   October 3, 2000, 13:57
Default Re: Fortran compiler
  #9
Arturo Ortiz
Guest
 
Posts: n/a
Finally I've been successful in compiling with Digital Visual Fortran, the only trick is to use version 5 and the compilation get well. Not everything is Ok, when the Linking stage begins it sends me the following message:

Fatal error in Pass2

I dont think is because of the fortran compiler but of another source, but I don have a clue about how to fix it.

Regards.
  Reply With Quote

Old   October 3, 2000, 22:41
Default Re: Fortran compiler
  #10
Greg Perkins
Guest
 
Posts: n/a
While I don't know the details of what your doing, I assume you've been able to compile 'your' user code. The next step is to link it to the object files supplied by Fluent.

As I mentioned in a previous post - you will need to ensure that any compiler/linker you use, is compatible with the object codes produced by the Absoft one Fluent has used in generating the pre-compiled objects.

I don't know whether there are standards on object files or not. You probably should check. If they're aren't and every compiler uses a different standard its very unlikely you can use a compiler other Absoft Fortran.

From your comments I suspect this may be the problem. Of course, your problem may be something different altogether....
  Reply With Quote

Old   October 4, 2000, 10:54
Default Re: Fortran compiler
  #11
Arturo Ortiz
Guest
 
Posts: n/a
Hi Greg I compiled all the fluent libraries and finally I got an exe file called fl415.exe, but then the compiler stoped giving me the fatal error in pass 1.

Anyway I think you're right and we are doomed to follow fluent's directions and use absoft's compiler.

Thanks everybody for your help. Arturo
  Reply With Quote

Old   October 4, 2000, 13:36
Default To andy
  #12
Arturo Ortiz
Guest
 
Posts: n/a
I will try your approach and re-post if I can do it, thanks for the idea. Regards
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Intel Fortran Compiler & Tutorial 17 Young CFX 1 March 30, 2011 01:39
Fortran Compiler and example Young CFX 1 March 22, 2011 23:26
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 14:43
Fortran compiler Erik CD-adapco 2 November 28, 2008 21:05
Fortran compiler Arnab CD-adapco 5 September 14, 2004 03:59


All times are GMT -4. The time now is 14:20.