[Scons-users] Scons-users Digest, Vol 133, Issue 2
Lan Yang
lanyang at autox.ai
Thu Sep 8 23:41:11 EDT 2022
Bill,
Thanks for your reply! It helps a lot. 👍👍👍
I've runs with `--debug=explain`, it outputted as follow:
>
> Info: Start building, please wait ...
> scons: Reading SConscript files ...
> Newlib version:3.3.0
> scons: done reading SConscript files.
> scons: Building targets ...
> scons: building associated VariantDir targets: build
> scons: rebuilding `xnav_s32k344.elf' because the dependency order changed:
scons: rebuilding `rtthread.elf' because the dependency order changed:
So, It seems caused by the reason you mentioned,
the dependency files haven't been found in the same order from run ro run.
I'll try to sort the dependency list before using it today.
Would you please send me a demo which sort the list before using?
You can reproduce the feature I asked for by just compiling in RT-Thread
released v4.1.0's code.
The reproduction steps are:
1. download RT-Thread released v4.1.0 from:
https://github.com/RT-Thread/rt-thread/releases/tag/v4.1.0
2. cd ..\rt-thread-4.1.0\bsp\stm32\stm32h750-armfly-h7-tool
3. run Scons two times inside the folder, and compare the generated .map
files
Best regard,
Lan
On Fri, Sep 9, 2022 at 8:10 AM <scons-users-request at scons.org> wrote:
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> Today's Topics:
>
> 1. How to fix the link order of scons? (Lan Yang)
> 2. Re: How to fix the link order of scons? (Bill Deegan)
> 3. Re: How to fix the link order of scons? (Bill Deegan)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 8 Sep 2022 19:55:48 +0800
> From: Lan Yang <lanyang at autox.ai>
> To: scons-users at scons.org
> Subject: [Scons-users] How to fix the link order of scons?
> Message-ID:
> <CALxRPyukn_xYx-wyvD2R=
> hrfaTjD+NwAmiySVOPz1MJiC+_epQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Scons users,
>
> There's a Scons feature that's been bothering me for two weeks.
>
>
>
> *"When the source files are the same, the sequential compilation and
> linking order of scons is not fixed, which is reflected in the inconsistent
> map files generated."*
>
> I compiled RT-Thread <https://github.com/RT-Thread/rt-thread> with Scons,
> an open source embedded OS.
> In the case that nothing is changed in the same project,
> the map files generated two times are different,
> which leads to different BIN files (the firmware downloaded to the MCU)
> that are finally generated.
> This means that the same source code may make the MCU behave differently,
> which brings some potential bugs.
>
> When we use Keil <https://www.keil.com/> or other MCU SDK, the map files
> generated by continuous compilation are the same.
>
> Therefore, I hope to fix the link order of Scons so that the same source
> code can be compiled to generate the same map file and firmware.
>
> *So, can Scons fix the order of links? How to fix the link order of Scons?*
>
> Best regards,
> Lan
>
> --
>
>
>
>
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> Message: 2
> Date: Thu, 8 Sep 2022 10:31:34 -0700
> From: Bill Deegan <bill at baddogconsulting.com>
> To: SCons users mailing list <scons-users at scons.org>
> Subject: Re: [Scons-users] How to fix the link order of scons?
> Message-ID:
> <CAEyG4CFdcOeetFoy0r8_NQohQwSaJ0kpkxgM16++Z4SOpBC=
> Pw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Lan,
>
> Not sure where you're getting this quote from:
>
>
> *"When the source files are the same, the sequential compilation and
> linking order of scons is not fixed, which is reflected in the inconsistent
> map files generated."*
>
> That shouldn't be happening unless there's something wrong with the way
> you're using SCons.
> If you're using Glob() to find source files for builders, then it's
> possible they may not be found in the same order from run to run, in which
> case you should sort the list before using it.
>
> But honestly there's just not enough information yet to help you.
> Try running two runs with `--debug=explain`
> Also does this build output the full command lines of all the compile
> steps?
> If so build -j1 from a clean build and compare the output.
>
> -Bill
>
>
> On Thu, Sep 8, 2022 at 4:56 AM Lan Yang <lanyang at autox.ai> wrote:
>
> > Dear Scons users,
> >
> > There's a Scons feature that's been bothering me for two weeks.
> >
> >
> >
> > *"When the source files are the same, the sequential compilation and
> > linking order of scons is not fixed, which is reflected in the
> inconsistent
> > map files generated."*
> >
> > I compiled RT-Thread <https://github.com/RT-Thread/rt-thread> with
> Scons,
> > an open source embedded OS.
> > In the case that nothing is changed in the same project,
> > the map files generated two times are different,
> > which leads to different BIN files (the firmware downloaded to the MCU)
> > that are finally generated.
> > This means that the same source code may make the MCU behave differently,
> > which brings some potential bugs.
> >
> > When we use Keil <https://www.keil.com/> or other MCU SDK, the map files
> > generated by continuous compilation are the same.
> >
> > Therefore, I hope to fix the link order of Scons so that the same source
> > code can be compiled to generate the same map file and firmware.
> >
> > *So, can Scons fix the order of links? How to fix the link order of
> Scons?*
> >
> > Best regards,
> > Lan
> >
> >
> > ------------------------------
> >
> > *CONFIDENTIALITY NOTICE: The contents of this email and any attachments
> are intended solely for the addressee(s) and contain confidential and/or
> privileged information and are legally protected from disclosure unless
> otherwise indicated. If you received this message by mistake, please
> immediately alert the sender by reply email and then delete this message
> and any attachments. If you are not the intended recipient, you are hereby
> notified that any use, dissemination, copying, or storage of this message
> or its attachments is strictly prohibited. *
> > _______________________________________________
> > Scons-users mailing list
> > Scons-users at scons.org
> > https://pairlist4.pair.net/mailman/listinfo/scons-users
> >
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> ------------------------------
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> Message: 3
> Date: Thu, 8 Sep 2022 17:10:15 -0700
> From: Bill Deegan <bill at baddogconsulting.com>
> To: SCons users mailing list <scons-users at scons.org>
> Subject: Re: [Scons-users] How to fix the link order of scons?
> Message-ID:
> <CAEyG4CFerY0Fvo_wGeJ6iuE=
> 5VLu_MrD0saz3+n7AcKje9gbwQ at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Lan,
>
> This problem has been brought to our user communities attention before and
> a fix has been provided.
> I guess it didn't make it upstream.
>
> If you change this function
> https://github.com/RT-Thread/rt-thread/blob/master/tools/building.py#L367
> To return a sorted list instead of the unordered (and likely order changing
> on each run) list it's currently returning, that should (we believe)
> resolve your issue.
>
> -Bill
>
> On Thu, Sep 8, 2022 at 10:31 AM Bill Deegan <bill at baddogconsulting.com>
> wrote:
>
> > Lan,
> >
> > Not sure where you're getting this quote from:
> >
> >
> > *"When the source files are the same, the sequential compilation and
> > linking order of scons is not fixed, which is reflected in the
> inconsistent
> > map files generated."*
> >
> > That shouldn't be happening unless there's something wrong with the way
> > you're using SCons.
> > If you're using Glob() to find source files for builders, then it's
> > possible they may not be found in the same order from run to run, in
> which
> > case you should sort the list before using it.
> >
> > But honestly there's just not enough information yet to help you.
> > Try running two runs with `--debug=explain`
> > Also does this build output the full command lines of all the compile
> > steps?
> > If so build -j1 from a clean build and compare the output.
> >
> > -Bill
> >
> >
> > On Thu, Sep 8, 2022 at 4:56 AM Lan Yang <lanyang at autox.ai> wrote:
> >
> >> Dear Scons users,
> >>
> >> There's a Scons feature that's been bothering me for two weeks.
> >>
> >>
> >>
> >> *"When the source files are the same, the sequential compilation and
> >> linking order of scons is not fixed, which is reflected in the
> inconsistent
> >> map files generated."*
> >>
> >> I compiled RT-Thread <https://github.com/RT-Thread/rt-thread> with
> >> Scons, an open source embedded OS.
> >> In the case that nothing is changed in the same project,
> >> the map files generated two times are different,
> >> which leads to different BIN files (the firmware downloaded to the MCU)
> >> that are finally generated.
> >> This means that the same source code may make the MCU behave
> differently,
> >> which brings some potential bugs.
> >>
> >> When we use Keil <https://www.keil.com/> or other MCU SDK, the map
> files
> >> generated by continuous compilation are the same.
> >>
> >> Therefore, I hope to fix the link order of Scons so that the same source
> >> code can be compiled to generate the same map file and firmware.
> >>
> >> *So, can Scons fix the order of links? How to fix the link order of
> >> Scons?*
> >>
> >> Best regards,
> >> Lan
> >>
> >>
> >> ------------------------------
> >>
> >> *CONFIDENTIALITY NOTICE: The contents of this email and any attachments
> are intended solely for the addressee(s) and contain confidential and/or
> privileged information and are legally protected from disclosure unless
> otherwise indicated. If you received this message by mistake, please
> immediately alert the sender by reply email and then delete this message
> and any attachments. If you are not the intended recipient, you are hereby
> notified that any use, dissemination, copying, or storage of this message
> or its attachments is strictly prohibited. *
> >> _______________________________________________
> >> Scons-users mailing list
> >> Scons-users at scons.org
> >> https://pairlist4.pair.net/mailman/listinfo/scons-users
> >>
> >
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