Re: multi-threaded compiling

[alex xmb sw ratchev]

On Mon, Mar 11, 2024, 19:22 Mischa Baars <mjbaars1977.backup@gmail.com>
wrote:

> On Mon, Mar 11, 2024 at 6:22 PM alex xmb sw ratchev <fxmbsw7@gmail.com>
> wrote:
>
>> i also completly dont get ur issue
>>
>> f=( a.c b.c .. ) threads=$( nproc ) i=-1 r=
>>
>>   while [[ -v f[++i] ]] ; do
>>  (( ++r > threads )) &&
>> wait -n
>> gcc -c "${f[i]}" &
>>   done
>>
>
> How nice!
>
> wait -n exit 1 & echo $?
>

doesnt need a pid
1 : 1 as i wrote it , excepts add 'wait' as new last line

You got me the solution :) Except that wait expects a pid after -n.
>
> Maybe
>
> for (( i=0; i<32; i++ )); do exit 1 & wait -n $!; echo $?; done;
>
> is what you meant? The equivalence of sequential execution?
>
> First think, then do magic.
>
>
>>
>>
>
>>
>> On Mon, Mar 11, 2024, 18:16 Mischa Baars <mjbaars1977.backup@gmail.com>
>> wrote:
>>
>>> Hello Paul,
>>>
>>> It seems I'm awake a little longer than you are.
>>>
>>> The second paragraph as you see it, belongs to 1)
>>> The fourth paragraph as you see it, belongs to 2)
>>>
>>> The actual command invocations (a Makefile, a make.sh script) can be
>>> found
>>> in the attachment, as indicated on the first line of the mail. In the
>>> attachment there are two directories, one and two, belonging to 1) and 2)
>>> respectively.
>>>
>>> I'm not into Vulcan mindmelds, so I hope everything from the first mail
>>> makes sense to you and everyone on this mailing list now.
>>>
>>> Best regards,
>>> Mischa Baars.
>>>
>>> On Mon, Mar 11, 2024 at 5:01 PM Paul Smith <psmith@gnu.org> wrote:
>>>
>>> > On Mon, 2024-03-11 at 09:56 +0100, Mischa Baars wrote:
>>> > > I've attached the problem. It consists of two parts:
>>> > >
>>> > > 1) multi-threaded bash script and / or multi-threaded Makefile
>>> > >
>>> > > Running bash script functions as expected, but executing the same
>>> > > line of code with make and / or the command line, does not function.
>>> > > Perhaps someone could explain to me why?
>>> > >
>>> > > 2) passing a string argument from a bash script and / or Makefile to
>>> > > the gcc -D option
>>> > >
>>> > > Running the makefile functions as expected, but I have not been able
>>> > > to get similar code to work from a bash script. Can someone please
>>> > > explain to me what I'm doing wrong?
>>> >
>>> > I don't understand the problem.  In the third paragraph above you say
>>> > the bash script works as expected and the makefile doesn't work, but in
>>> > the last paragraph you say that the makefile works as expected but you
>>> > can't get it to work in bash.
>>> >
>>> > Please provide actual command invocations (cut and pasted) showing the
>>> > output you received and explaining exactly what is wrong with it.
>>> >
>>> > But before you do that, be aware that make does NOT invoke /bin/bash as
>>> > its shell.  It invokes /bin/sh.  On some systems /bin/sh is actually an
>>> > alias for bash.  On other systems it isn't.
>>> >
>>> > If you want your makefile to always use bash as its shell, you should
>>> > add an explicit:
>>> >
>>> >     SHELL := /bin/bash
>>> >
>>> > to your makefile to force it.  Maybe that will solve your problem.  If
>>> > not we'll need details such as I mention above.
>>> >
>>>
>>