VS Arduino - How do I change the compiler version to C++ 17 (it's now 11) ?

Jun 7^th, 2025 at 7:45pm (UTC)

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VS Arduino › › › How do I change the compiler version to C++ 17 (it's now 11) ?

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How do I change the compiler version to C++ 17 (it's now 11) ? (Read 2431 times)

Bruce S Junior Member Offline Posts: 11 Location: Ohio, USA Joined: Nov 11^th, 2014	How do I change the compiler version to C++ 17 (it's now 11) ? May 3^rd, 2023 at 3:34am	Print Post
	How do I change the compiler version to C++ 17 (it's now 11) ? I have Visual Micro with MSVC 2019.


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Simon@Visual Micro Administrator Offline Posts: 2710 Joined: Feb 13^th, 2019	Re: How do I change the compiler version to C++ 17 (it's now 11) ? Reply #1 - May 3^rd, 2023 at 7:35am	Print Post
	Please provide the logging information with the settings shown at the top of the page. The compiler is normally determined and supplied as part of your board package, which Visual Micro then uses for compilation and in the latest versions it uses the same version for intellisense. If your project is in the latest format it will have "(Arduino)" shown after the project name in the Solution Explorer window.


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Bruce S Junior Member Offline Posts: 11 Location: Ohio, USA Joined: Nov 11^th, 2014	Re: How do I change the compiler version to C++ 17 (it's now 11) ? Reply #2 - May 4^th, 2023 at 6:23pm	Print Post
	Hi, thanks for the reply. Here is a build output of a new project that I just added blinking led to. I didn't include it before since I'm not attempting to open a trouble ticket. I just want to know how to choose a different compiler version, like in other IDE's. To be clear, I want the same compiler but a newer C++ standard than C++11. The current one (C++11) won't even compile (for example) the stdio.h definition for FDEV_SETUP_STREAM(). I realize that VM is wrapping the Arduino's managed build process, and so it may not be so simple. I was hoping that VM would just have a default and an override in its settings. Apparently not, based on your previous message. Perhaps I need to create a custom board in order to change the compiler C++ standard version ? (I'm not sure how to do that yet). Or there are the settings in platform.txt - any opinions or recommendations on an unobtrusive way to do pick the C++ version ? P.S. My VM installation is pretty new (2021.1108.1918), but I don't know if your latest VM version is newer than mine, since your download link does not work (tried 2023.05.03): https://www.visualmicro.com/downloads/Visual.Micro.Arduino.Studio_19.vsix [apparently fixed the next day] P.P.S.: Also, how can I tell what version of VM is being offered on the web site ?


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Tim@Visual Micro Administrator Offline Posts: 12191 Location: United Kingdom Joined: Apr 10^th, 2010	Re: How do I change the compiler version to C++ 17 (it's now 11) ? Reply #3 - May 4^th, 2023 at 7:26pm	Print Post
	The Visual Micro web site download for VS2022 opens the Microsoft Gallery page. That shows our current version. The releases page on VisualMicro.com also shows the current version. You are right, the version of Visual Micro is irrelavent for this discussion. The c++ version for build is built into whatever arduino core you are using. That is why we asked for your output and also why we have the yellow highlight at the top of this page. The requested output is not attached to your last post. The output would not only show which core you are using but also show how to override the c++ version. Overriding the C++ version might or might not work, it depends on how the core you have installed has been designed. The C++ version for intellisense is best guess by Visual Micro when it inspects the core. There is not an arduino standard that disctates how the c++ version should be delcared. It is up to each core author. The intellisense is discontected from the build system and attempts to work even before you have built the code. The intellisense for older format Visual Micro projects was an override on top of MSVC. The newer form Visual Micro projects since approx 6 months ago uses a flavour of the Microsoft Linux workload. That gives more accurate intellisense for multiple reasons. I mention this so that you can understand the minor role MSVC has. In fact none with the newer projects. The latest Rc download in this forum is not yet in the gallery but is gallery ready. It contains a new toolbar button only appears when inside old format projects. It provides a simple converter so that you can use the new intellisense. The new format projects also set the C++ version more accurately than older format projects. You might find that your core is using a new c++ version but the intellisense has made you believe it is not. It is difficult to give a simle accurate answer without the build output.
	« Last Edit: May 4^th, 2023 at 8:30pm by Tim@Visual Micro »

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