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/GA (Optimize for Windows Application)
Results in more efficient code for an .exe file for accessing thread-local storage (TLS) variables.
Using /GA for a DLL can result in bad code generation.
To set this compiler option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see.
Click the C/C++ folder.
Click the Command Line property page.
Type the compiler option in the Additional Options box.
To set this compiler option programmatically