VS Arduino - -Werror=all ? I never opted for this switch !

May 5^th, 2025 at 9:17pm (UTC)

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VS Arduino › Visual Micro › Installation & Troubleshooting › -Werror=all ? I never opted for this switch !

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-Werror=all ? I never opted for this switch ! (Read 1622 times)

Asmodyne Newbies Offline Posts: 7 Location: Fr Joined: Nov 1^st, 2019	-Werror=all ? I never opted for this switch ! Oct 9^th, 2022 at 1:31am	Print Post
	Hello there ! This weekend, I dusted a large ESP32 VM project I've been working on this year. It has been working fine on the last time I closed the solution, in early july 2022. But yesterday, 8th of october 2022, I encounter some weird behavior of the compiler : it was behaving as if -Wall & -Werror=all had been turned on ! As in... GDEH029Z13.cpp: 364:14: error: unused variable 'len' [-Werror=unused-variable] -"Come on, I'd usually expect this as a simple warning !" I said to myself. To I checked all files contained in the _vm folder, along with the .vcxproj files (eithier vcxproj, .vcxproj.filters or vcxproj.user). And there it was: a collection of "-Wno-Error=xxx", "-Wall" "-WExtras" the monstrous "-Werror=all" flags in those project and config files ! That's new ! Those aren't the errors I was expecting to get ( some of my classes weren't fully implemented, I was hoping for some syntax errors from a TODO or some missing declarations, but not some strictly-conformed ISO enforcement ! Since I've turned versioning on for my projects folders (I mean file versioning, the MS Windows' feature), I still can retrieve the July versions of those same folders, but were are those compilation switches coming from ? Factually, no one tech savvy enough has access to my workstation (since I'm teleworking), and those projects aren't published on any version control system (it's all on a detached machine, those are private projects). Any ideas about this sudden change ? Can Visual Micro encounter spurious default change when updating it ? I'm at a loss. Thanks for any help.


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Asmodyne Newbies Offline Posts: 7 Location: Fr Joined: Nov 1^st, 2019	Re: -Werror=all ? I never opted for this switch ! Reply #1 - Oct 9^th, 2022 at 1:32am	Print Post
	The output of my latest build attempt.

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Simon@Visual Micro Administrator Offline Posts: 2695 Joined: Feb 13^th, 2019	Re: -Werror=all ? I never opted for this switch ! Reply #2 - Oct 9^th, 2022 at 2:06pm	Print Post
	If you turn off the vMicro > Compiler > Warnings for Project it will remove the -Wall -Werror=all from the project compilation.


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Asmodyne Newbies Offline Posts: 7 Location: Fr Joined: Nov 1^st, 2019	Re: -Werror=all ? I never opted for this switch ! Reply #3 - Oct 9^th, 2022 at 10:22pm	Print Post
	Simon@Visual Micro wrote on Oct 9^th, 2022 at 2:06pm: If you turn off the vMicro > Compiler > Warnings for Project it will remove the -Wall -Werror=all from the project compilation. Ah.... This indeed works, thanks. But why the "-Werror=all" ? I expected this : disabling the option would disable warning. Not enabling it would turn all warning on and enforces them as errors.


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Simon@Visual Micro Administrator Offline Posts: 2695 Joined: Feb 13^th, 2019	Re: -Werror=all ? I never opted for this switch ! Reply #4 - Oct 10^th, 2022 at 9:13am	Print Post
	The compiler flags added when warnings are enabled are determined by the board package in use, which are specified by "compiler.warning_flags.more" in platform.txt. You can specify your own flags separate to these options using the vMicro > Project Properties, Configuration Extra Flags (which can be for all code, or specific to core/libraries/project).


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Asmodyne Newbies Offline Posts: 7 Location: Fr Joined: Nov 1^st, 2019	Re: -Werror=all ? I never opted for this switch ! Reply #5 - Oct 10^th, 2022 at 1:39pm	Print Post
	So it's a change in the ESP32 arduino core package. Thanks again !


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