I am getting the following info when compiling my Release version of a GUI App, with VS 2019:
1>LINK : the 32-bit linker (C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX86\x64\link.exe) failed to do memory mapped file I/O on `x64\Release\App\xxxx-apphost.iobj' and is going to restart linking with a 64-bit linker for better throughput
1>LINK : restarting link with 64-bit linker `C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\link.exe'
It eventually links but this takes way longer.
I have read that you can force VS 2019 to use the 64-bit linker tools (they user 32-bit by default, even if you are building 64-bit projects) by setting an Environment Variable for PreferredToolArchitecture=x64.
I am a Mac User, so this is new to me.
I tried setting like this in System Properties > Advanced > Environment Variables >
by adding a new Variable
PreferredToolArchitecture with a value of
… but it appears to have no effect. You can see in the Task Manager it is still using the 32-bit tools: