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From: Lynn McGuire <lynnmcguire5@gmail.com>
Newsgroups: comp.lang.fortran
Subject: Re: I am getting a strange error when compiling abcpar.f in gfortran
Date: Mon, 18 Nov 2024 13:38:09 -0600
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On 11/18/2024 5:50 AM, R Daneel Olivaw wrote:
> Lynn McGuire wrote:
>> On 11/12/2024 4:01 PM, baf wrote:
>>> On 11/12/2024 12:43 PM, Lynn McGuire wrote:
>>>>>>>>
>>>>>>> If all of your general purpose subroutines and functions are in 
>>>>>>> modules, you don't need interfaces for them (one of the 
>>>>>>> advantages of modules).
>>>>>>
>>>>>> I have 6,000 subroutines in 5,000 files.  All I did was put 
>>>>>> interfaces for about 2,600 of the subroutines into a single module.
>>>>>>
>>>>>> Lynn
>>>>>>
>>>>> A better alternative would be to put the subroutines in the module 
>>>>> and USE the module. Then you don't need the interfaces (the 
>>>>> compiler gets all of the interface information "automagically").
>>>>
>>>> 850,000 lines of code in a single file ?  That would be a mess.
>>>>
>>>> Lynn
>>>>
>>> I wasn't suggesting a single module. Partition the subprograms into 
>>> meaningful subgroups. Also, as was indicated, you can use submodules 
>>> to avoid cascading compilation issues with a large number of modules.
>>
>> My father and two other engineer profs started developing the software 
>> back in 1968 on a Univac 1108.  It had 32K words of data space and 32K 
>> words of code space.  To build large software, we had to manually 
>> partition the software ourselves so that it would fit into those 32K 
>> words of code space.  It was a major pain when somebody would update a 
>> subroutine and mess up the partition map.
>>
>> When I personally started working on the software in 1975, it was one 
>> of my jobs to update the huge partition map on the wall outside my 
>> bosses office.  I used the big computer sheets and taped them 
>> together, about a hundred or so of the sheets.
>>
>> Never again.
>>
>> Lynn
>>
> 
> Were you using @FOR (Fielddata) or @FTN (Ascii)?
> Things became much simpler when multiple Ibanks and addresses over 0200 
> 000 became possible (for @ftn, @for was abandoned at some point).  I 
> think @ftn also permitted multiple Dbanks but I never used that, the 
> code generated was - by necessity - horrific.

It has been 49 years ago, I do not remember.  Too many computers, too 
many languages.  I have written software in around dozen languages and a 
dozen platforms now.  Fortran, IBM 370 Assembly, Basic, Pascal, C, HTML, 
Perl, C++, Smalltalk, bsh, Visual Basic, etc.

We gave up on the Univac 1108 in 1981 ??? and the CDC 7600 in 1982.  I 
started working at another company in 1982 when I finished my degree in 
Mechanical Engineering at TAMU.  I went back to the engineering software 
company in 1989.

Lynn