Re: Compiling and linking code from different places in the file system

From	Rod Pemberton <NoEmail@trraxvfeqa.prg>
Newsgroups	comp.lang.misc
Subject	Re: Compiling and linking code from different places in the file system
Date	2018-03-24 01:38 -0400
Organization	Aioe.org NNTP Server
Message-ID	<p94o5c$a88$1@gioia.aioe.org> (permalink)
References	(10 earlier) <p8eli7$2c4$1@dont-email.me> <p8jddr$vo7$1@gioia.aioe.org> <p8q9rp$7gn$1@dont-email.me> <p8rtf9$1gsu$2@gioia.aioe.org> <p8t0hl$npf$1@dont-email.me>

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On Wed, 21 Mar 2018 07:10:43 +0000
James Harris <james.harris.1@gmail.com> wrote:

(snip)

> Yes and no.

...

> Yes, the compiler has to produce object code for the
> minimum CPU and instruction set.

Minimum?  Who /wants/ to support RM16? ...

> No, the compiler doesn't need to produce code for different
> environments; it can leave that to interfacing code and the linker.

...

So, one platform has sbrk() and another has mmap().

So, one platform has int 0x21, but another has syscall or sysenter.

So, one platform has an OS call for argv, argc, but another must create
their own.

So, one platform has a POSIX compliant file I/O system, but another does
not.

I.e., I think issues like these, and others, would effectively require
a software translation layer in between the host independent code
your compiler is apparently producing, and the host dependent code the
OS environment needs to execute the application.  I believe this is
needed in order to effect your belief that "the compiler doesn't need to
produce code for different environments".  E.g., for sbrk() vs.
mmap(), you'd need a single function that would eventually map onto
either sbrk() or mmap() depending on what the OS environment supports.
Dealing with all of these issues (an more), will create a library of
such interface functions, or a translation layer.

> The make system is good. But it has its failings. Given that other 
> people have come up with alternatives, how do you get to the point of 
> saying that someone else considering an alternative is succumbing to 
> confirmation bias?

Plenty have tried and failed, but one is attempting it yet again?
(Yes, I'm guilty of that, if that's where you were headed.)

My presumption is that if it is a serious enough problem and it is a
problem that can be solved, then someone in academia, e.g, computer
science professor, would've solved it by now, or maybe, a hacker
would've stumbled across a workable solution already.  Of course, it
may be worthy to try an alternate solution.

> And aside from the work involved, what negatives of producing a new >
> system do you think are being disregarded (your phrase)?

So, I'm not playing Devil's advocate now?  I have no idea.  I could
assume there might be some incompatibilities between platforms that
cause implementation problems, e.g., sequencing, or possibly, there
might be difficulty in implementing a portable solution.  This could be
due to the commands needed or perhaps due to information needed from the
compilers or assemblers.  You could also have limitations or large
differences where no easy cooperative solution works.

Above, (snipped) the negatives were:

a) "not an effective solution in general"
b) "no perfect solution to be found"

> >> Basically, the command to be run would depend on the source file
> >> type /and/ the target file type. The full command including all
> >> options would depend on a lot more, but hopefully the above shows
> >> the idea.  
> > 
> > I would think that you could produce links or files with different
> > names, that are designed to execute the compiler in different ways.
> > E.g.,
> > 
> > (normal)
> >     cc -m32 -c $(src) -o $(target)
> > 
> > (cross)
> >     cc-x -m32 -c $(src) -o $(target)
> > 
> > Simply calling cc-x instead of cc, would do all the extra stuff.  Of
> > course, this would depend on producing a script or batch file named
> > cc-x.  You'd probably need something a like Linux shell, bash, on
> > targets which don't support it.  Or, you could use a makefile with
> > make, ISTM.  
> 
> I have thought of something similar but in your view what would be
> the advantage of doing that rather than running commands directly?

If you meant typing commands in on the command line by "running
commands directly," then you only have to type the shorter "cc-x ..."
instead of the longer command, because the full commands are stored in
a file or script.  You also don't need to memorize the arguments or
parameters either.

If the config file or script or batch file is processed by a program,
you can allow for all sorts of things to happen, e.g., input
parameters, shifting of parameters, parsing/processing file names,
directories, strings, do computations or accept user input, checks for
files or directories or other file system operations, etc.

> Wouldn't it be better to have a program work out the possible 
> derivatives rather than having to specify them?

IMO, yes.

> You were arguing before for automation but now you seem to have
> switched to manual specification.

Of course, but I thought you "rejected" the idea of parsing the code, or
compiling a code snippet to determine this information.  You wanted a
specification of some sort, or seemed to.  So, where do you put the
specification?  A separate file, which is extra work synchronizing, or
embedded within the code?  Comments are available, or should be, for
every programming language, if you decide on embedding the
specification within the code, instead of using separate control files
or make files or scripts, etc.

Arguing?  Recommending.

> Sorry, I don't mean the builds being done in parallel. I just mean
> that they can all be done as a result of the running of one command.
> I.e. the command builds them all before it finishes. That could be in
> parallel or concurrently or one after another.

So, forked/spawned builds (multi-process) at once for multiple
platforms?  Or, sequential, one platform after another?

Rod Pemberton
-- 
Facebook is dead. They banned Trump's campaign for a data breach, but
looked the other way for Obama's campaign.  So, why was it a breach of
trust for Trump, Zuckerberg?

Thread

Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-01 14:40 +0000
  Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-01 14:55 +0000
    Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-02 21:05 +0000
      Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-03 01:18 +0000
        Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-09 01:03 +0000
      Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-06 06:40 -0500
        Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-06 21:10 +0000
          Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-07 06:58 -0500
            Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-09 01:23 +0000
              Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-09 02:28 -0500
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-09 02:44 -0500
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-09 23:26 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-11 07:44 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-12 21:59 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-14 01:45 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-14 10:59 +0000
      Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-06 06:40 -0500
        Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-06 21:20 +0000
          Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-07 06:58 -0500
            Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-09 10:30 +0000
  Re: Compiling and linking code from different places in the file system "James R. Kuyper" <jameskuyper@verizon.net> - 2018-03-01 11:11 -0500
    Re: Compiling and linking code from different places in the file system "James R. Kuyper" <jameskuyper@verizon.net> - 2018-03-01 13:51 -0500
    Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-03 09:48 +0000
  Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-03 12:25 +0000
    Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-03 15:32 +0000
      Re: Compiling and linking code from different places in the file system Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-04 07:52 +0000
      Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-04 08:43 +0000
        Re: Compiling and linking code from different places in the file system Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-05 07:58 +0000
          Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-06 21:37 +0000
            Re: Compiling and linking code from different places in the file system Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-03-07 21:02 +0000
        Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-05 15:29 +0000
          Re: Compiling and linking code from different places in the file system rugxulo@gmail.com - 2018-03-06 18:23 -0800
          Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-07 04:54 +0000
            Re: Compiling and linking code from different places in the file system Robert Wessel <robertwessel2@yahoo.com> - 2018-03-07 00:33 -0600
              Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-07 09:55 +0000
              Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-07 17:29 +0000
  Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-06 06:39 -0500
    Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-07 10:44 +0000
      Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-07 06:57 -0500
        Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-09 10:28 +0000
          Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-11 07:44 -0400
            Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-12 22:44 +0000
              Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-14 01:47 -0400
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-14 10:23 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-14 11:30 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-14 11:30 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-14 13:30 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-14 14:32 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-14 16:01 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-14 19:28 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-15 08:59 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-15 19:21 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-16 08:08 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-16 11:12 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-16 16:45 +0100
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-16 16:09 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-16 18:42 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-17 18:32 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-17 21:37 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-17 21:00 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-18 11:39 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-18 12:29 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-19 13:38 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-20 05:40 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-20 11:05 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-21 06:03 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-21 18:51 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-21 19:55 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-23 18:03 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-23 20:13 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-24 01:30 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-24 16:48 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-26 19:42 +0100
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-26 22:35 +0100
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-24 12:01 +0100
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-23 20:58 +0100
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-23 20:49 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-20 18:37 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-21 19:33 +0000
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-21 20:35 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-23 21:10 +0100
                Re: Compiling and linking code from different places in the file system Marco van de Voort <marcov@toad.stack.nl> - 2018-04-19 06:47 +0000
                Re: Compiling and linking code from different places in the file system Andy Walker <anw@cuboid.co.uk> - 2018-03-27 00:58 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-30 19:55 +0100
                Re: Compiling and linking code from different places in the file system Marco van de Voort <marcov@toad.stack.nl> - 2018-04-19 06:49 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-23 21:04 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-23 21:54 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-24 11:22 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-24 12:12 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-24 13:15 +0100
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-24 13:36 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-24 14:52 +0000
                Re: Compiling and linking code from different places in the file system Marco van de Voort <marcov@toad.stack.nl> - 2018-04-19 11:06 +0000
                Re: Compiling and linking code from different places in the file system David Brown <david.brown@hesbynett.no> - 2018-03-14 16:52 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-14 19:38 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-15 09:00 +0100
                Re: Compiling and linking code from different places in the file system bartc <bc@freeuk.com> - 2018-03-15 12:54 +0000
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-14 11:18 +0000
                Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-14 13:52 +0100
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-15 06:29 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-15 20:37 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-17 11:51 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-20 06:31 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-20 17:14 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-21 07:10 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-24 01:38 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-24 16:10 +0000
                Re: Compiling and linking code from different places in the file system Rod Pemberton <NoEmail@trraxvfeqa.prg> - 2018-03-24 20:05 -0400
                Re: Compiling and linking code from different places in the file system James Harris <james.harris.1@gmail.com> - 2018-03-25 16:55 +0100
  Re: Compiling and linking code from different places in the file system "Pascal J. Bourguignon" <pjb@informatimago.com> - 2018-03-14 13:39 +0100

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