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  VS Arduino › › › how can I get the linker map? I need to review RAM utilization.
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Normal Topic how can I get the linker map? I need to review RAM utilization. (Read 91 times)
jimf
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how can I get the linker map? I need to review RAM utilization.
Jan 31st, 2026 at 9:43pm
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Hi, I'm using Visual Studio 2026 with the Visual Micro extension.  I'm writing C++ being deployed in a NANO 328p.  I'm building a library and my project has an .ino test program, two .cpp files, and one .h file.  Compiles and tests ok but I'm trying to minimize my RAM usage.  I think the way to do this is to examine the linker map.  Not sure how to generate it.  Google AI recommended the following:

Option A: Project Properties (Easiest)
Right-click your project in Solution Explorer and select Properties.
Locate Micro General > Extra Flags or Extra Linker Flags.
Add the following: -Wl,-Map,"$(ProjectDir)$(TargetName).map".
Rebuild your project. The .map file will be generated in your project folder or build output directory.

I can't find where to add switches to generate the linker map. 
Advice on how to do this or alternate approaches are much appreciated!

Not sure it is needed to answer this but I've attached a build+verbose.  Thx!
  
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Simon@Visual Micro
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Re: how can I get the linker map? I need to review RAM utilization.
Reply #1 - Feb 2nd, 2026 at 11:23am
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The simplest solution is to add a Local Board.txt to the project (vMicro > Add Code > Add Local Board.txt) and paste in the entry from the attached text file.

When entered in the project properties the merged parameters (e.g {build.path}) do not get resolved so the explicit folder path would need to be entered which is less flexible.

Also change your build configuration to Release, which will disable the Serial Debugger, and potentially save a little more memory.
  
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jimf
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Re: how can I get the linker map? I need to review RAM utilization.
Reply #2 - Feb 4th, 2026 at 7:46pm
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Thank you!
  
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