/utf-8 (Set Source and Executable character sets to UTF-8)
Specifies both the source character set and the execution character set as UTF-8.
You can use the /utf-8 option to specify both the source and execution character sets as encoded by using UTF-8. It is equivalent to specifying /source-charset:utf-8 /execution-charset:utf-8 on the command line. Any of these options also enables the /validate-charset option by default. For a list of supported code page identifiers and character set names, see Code Page Identifiers.
By default, Visual Studio detects a byte-order mark to determine if the source file is in an encoded Unicode format, for example, UTF-16 or UTF-8. If no byte-order mark is found, it assumes the source file is encoded using the current user code page, unless you have specified a code page by using /utf-8 or the /source-charset option. Visual Studio allows you to save your C++ source code by using any of several character encodings. For information about source and execution character sets, see Character Sets in the language documentation.
To set this compiler option in the Visual Studio development environment
Open the project Property Pages dialog box. For more information, see Set C++ compiler and build properties in Visual Studio.
Expand the Configuration Properties, C/C++, Command Line folder.
In Additional Options, add the /utf-8 option to specify your preferred encoding.
Choose OK to save your changes.
MSVC Compiler Options
MSVC Compiler Command-Line Syntax
/execution-charset (Set Execution Character Set)
/source-charset (Set Source Character Set)
/validate-charset (Validate for compatible characters)
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