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From: R Daneel Olivaw <Danny@hyperspace.vogon.gov>
Newsgroups: comp.lang.fortran
Subject: Re: I am getting a strange error when compiling abcpar.f in gfortran
Date: Mon, 18 Nov 2024 12:50:28 +0100
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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.