<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/94366>94366</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-cl] Provide implicit declarations of `wmain`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          MisterDA
      </td>
    </tr>
</table>

<pre>
    clang-cl warns that a declaration is missing for `wmain`:

```console
> clang-cl --version
clang version 17.0.3
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Tools\Llvm\x64\bin
```

```c
#include <stdio.h>

int wmain(void) {
    wprintf(L"Hello, world!");
    return 0;
}
```

```console
> $ clang-cl -Wall -D_UNICODE test.c
test.c(3,5): warning: no previous prototype for function 'wmain' [-Wmissing-prototypes]
    3 | int wmain(void) {
      |     ^
test.c(3,1): note: declare 'static' if the function is not intended to be used outside of this translation unit
    3 | int wmain(void) {
      | ^
      | static
1 warning generated.
```

See also [Using `wmain` § The `wmain` function signature](https://learn.microsoft.com/en-us/cpp/c-language/using-wmain?view=msvc-170#the-wmain-function-signature) from Microsoft's documentation.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJycVF2PmzgU_TU3L1dEYL7CAw8zMNFWancrddo-Vo59Q7wydmSbZPrvVwYmk1bV7qpShMn9wMfn3GPuvRoMUQvlI5T9hk_hZF37QflArn_YHKz83grNzZAIjVfujMdw4gE5ShKaOx6UNag8jsp7ZQY8WodQpdeRKwNVCvkDpD2kr88qXX7CGm81rdH8CW-bJMmFnFfWLLk5jmsIs3qbbvMl88zdQAHyB3zZVd-qIjmL5KqMtFefjP4i1qqTIy5xtJJ0rD1br16W1DvjA9eaZK9cTHURbNl9dHZwfMS90uSh7D4o4ay3x4BflJ-4xk9hkspC2bGUsbmBLoquUHZfOii7Z2t17HuvLyOU3UtVQNkdlPmJgV_Tsv5nuTJCT5IQ8s4Hqez2BPnTfY8yAReW2e5ilQTWINSPSxIR8Xp2yoQjsN17YOwP0toC6_BqnZbAMmAMWAP5XYejMDmD6S0Idf-_UP8sJrDiTtCvXGtM-m-f_3zX_dU_YSAftutJ13e2y4F15QzoYZ4zZYb4aiyeI7128nh2Ntjw_UzzkB0nI-bhA1avPNQI5WPydR3F5FbvoezfTpkj1B3-J304l81r-fQLsNkK1thAcV38QBGODzwoEfGoI4YTvWFVPtbHzclIkhgsHggnTxLtFLyShDa2KI_BceP14q_JqPCbB7iBfwut8OZo9ko2DmTI8UBy-y-SfyJCrr2NRH-e_X7ndYSOwUONzyf6IXw7fbxreJgcRT3Y7hTC2UfPsT2wvSbuzHZ8NdtW2BHYnkwyeWB7cT7HZxKHauIDAdtPs8jLLvl-dmDeR-MnWZ0Cy8OJlmzyCiB5A8AaPDo74s3cUTaUVkwjmTCzvt3INpdN3vANtVmd1WVWsjLfnNpDemxKanZpVhUVpVWd7lKW1kVTEROi2G1Uy1JWpFVaZGVeZNlW7pgQohGH6tDIMicoUhq50lutL-PWumGjvJ-obYq8qjaaH0j7-U5mzNAV52Q0bNlvXBt7ksM0eChSrXzwb18JKuj5Mn91H5Q9fnT2EidLjWethAr3V7eP83Yn1mZyuv1RmEGF03RY9Yg7rUv0198kArD9jC_KtOC_tOyfAAAA__91xuov">