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/WX (Treat linker warnings as errors)

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Specifies whether to treat linker warnings as errors.

Syntax

/WX[:NO]
/WX[:nnnn[,nnnn...]]

Remarks

The /WX linker option causes no output file to be generated if the linker generates a warning.

This option is similar to /WX for the compiler. For more information, see /w, /W0, /W1, /W2, /W3, /W4, /w1, /w2, /w3, /w4, /Wall, /wd, /we, /wo, /Wv, /WX (Warning Level). However, specifying /WX for the compilation doesn't imply that /WX will also be in effect for the link phase; you must explicitly specify /WX for each tool.

In Visual Studio 2022 and later versions, you can specify /WX with one or more comma-separated nnnn arguments, where nnnn is a number between 4000 and 4999. The linker treats the corresponding LNKnnnn warnings as errors.

By default, /WX isn't in effect. To treat linker warnings as errors, specify a /WX option. /WX:NO is the same as not specifying /WX, and overrides any previous /WX linker option.

To set this linker option in the Visual Studio development environment

  1. Open the project's Property Pages dialog box. For more information, see Set compiler and build properties.

  2. To set or unset all warnings as errors, select the Configuration Properties > Linker > General property page.

  3. Modify the Treat Linker Warnings as Errors property.

  4. To set specific warnings as errors, select the Configuration Properties > Linker > Command Line property page.

  5. In the Additional Options edit control, add /WX:warnings, where warnings is a comma-separated list of linker warning numbers.

  6. Choose OK or Apply to save your changes.

To set this linker option programmatically

See also

MSVC linker reference
MSVC linker options
/WX compiler option