<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/68995>68995</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            some warnings not shown using mingw headers
        </td>
    </tr>

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

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

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

<pre>
    ```C
#include <stdio.h>

int main() {
    int i;
    scanf("%f", &i);
    printf("%d", i, i ,2);

    return 0;
}
```

```
clang -Wall .\warn.c
.\warn.c:5:5: warning: 'scanf' is deprecated: This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use      _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    scanf("%f", &i);
    ^
C:\Program Files (x86)\Windows Kits\10\Include\10.0.22621.0\ucrt\stdio.h:1275:20: note: 'scanf' has been explicitly marked deprecated here
 _Check_return_ _CRT_INSECURE_DEPRECATE(scanf_s)
 ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.36.32532\include\vcruntime.h:355:55: note: expanded from macro
      '_CRT_INSECURE_DEPRECATE'
 #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
 ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.36.32532\include\vcruntime.h:345:47: note: expanded from macro
      '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
 ^
.\warn.c:5:17: warning: format specifies type 'float *' but the argument has type 'int *' [-Wformat]
 scanf("%f", &i);
           ~~   ^~
           %d
.\warn.c:6:21: warning: data argument not used by format string [-Wformat-extra-args]
 printf("%d", i, i ,2);
           ~~~~     ^
3 warnings generated.
```

```
clang -Wall --target=x86_64-w64-mingw32 .\warn.c

```
FYI, gcc generates warnings with the same header.
```
 gcc -Wall .\warn.c
.\warn.c: In function 'main':
.\warn.c:5:13: warning: format '%f' expects argument of type 'float *', but argument 2 has type 'int *' [-Wformat=]
    5 | scanf("%f", &i);
      |            ~^   ~~
      |             | |
      |             |   int *
      |             float *
      | %d
.\warn.c:6:12: warning: too many arguments for format [-Wformat-extra-args]
    6 |     printf("%d", i, i ,2);
      | 
      
```

My environment:
```
clang --version
clang version 16.0.6
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Users\snylo\scoop\apps\llvm\current\bin
```
```
gcc --version
gcc.exe (MinGW-W64 x86_64-msvcrt-posix-seh, built by Brecht Sanders) 13.2.0
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```
Both are installed through `scoop` (llvm and mingw-winlibs package)
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzMV0uT4jgS_jXikoHDlrENBw6UC2aJna6uAHpq50QIO21rx5YcklwUl_7tG5LNox5d09OnJaowUqZE5pdfPmBa81Igzkl0R6L7EetMJdVci1MtRYejg8xPcxL7_V9K_HviLwgNucjqLkcgYapNzqVXkXA5SN07FwYaxgWhU0JnQJK7fh8AwMo4CW92dMZE4VQpoVHhHikQGnNCZ680W8WFuarmgyp3b0BoSm9PXM8pNJ0S4F9Fyf3w4ezd7ZE3m1nNRAnjJ1bX4JEoPTIlvKyX3azDRTT8g93horQfCU0G_xLgGnJsFWbMYG6Fu4prKDqRGS4FSAXPTHF2qBEadoIDQic0K9CDVArNc1TQaS7KHrG9Bi60QZZ7sJOQc-1Onr-BS2Fh6TSCe-3TzW6_XabfNsv9w9f902LzsH74bevBFhGkqLlAqLBuoZAKcjSM19oDEt2Nn65Gj3PMaqbc7ZpE978SRBINXElJuCBR-qhkqVgDK16jBkKnL9PYnonSJy5yedTwb240idLAJ1G67rnnlp7vURrTwLOCLlOGRFdCLgKa2GBQ3yItpMG34aiYhgOiAHxpa55xU5-gYeovzG_CBBUqHIzfpxVmf-17Nu17RNcPA6b3y8fNMl3sloROh_hYL_qTn_pMovQLz5TUsjDwB9cdq2FrupxLEqXUp5REaSqbphPcnEiU_pGSKN1JWbuTW7cMJl4YeyGNQqvNLyA9Z6oThjfoIAkjR9HoFhF8aZnIMYdCyQYalil5jRVYwH7oZ3L2joY5FpZAP4Zkv8G2Zhk2KIytCU7zorDfLf-zI3Ta8yP9P0NtYgGbJL-A2lsHk0sNvQXsHQz7Hb70KO1twukWM0KnN7XjqvIBx97VpCB5U5QKqRpmwN7LC44azKlFa3RRS2aA0IXNj0NnwFQITJWdDZtLmLOmLeODnqsR_ZXXkvDz9WB4ff_e14bv7ySu0r_3LLbJHbzxLGeGXQ0W0tgCmMPhdPHZKFtBb2we44tRbMxUeVPR_lmneeWGc-SmzIVn-zSUKFDZAHq_1n3GY8NUiYaE9y_TeB9Pxsd4Mm64KI8hfdebPrxu9efa-lBm2cUafTXwyE3lYq5ZY9sBy1F9bKu74Sd6IqzFtcMRmvRjgSXkj8gafkxWe8gRKbHJh5nR1zjL4kMGW0ctiS969GcoHN6_amwRkCT9R3S2-reMINHSEeMTHbcmSfp3Kv34ZI3-RPEKwRulTxIpoG9QN1JCw8TpAp52g8E5GH-TPgAQX-z6lVxy5t6uf5wvX06A4pkrKVxvCT9No_EzKm1Ho5vNYQuC2PO9uJfshjxbwJBobTY-9uPIuNHPA9N3lUKWQyNzrK1uKzV_6UVroQ2ra8zvubKioYV906hsA3Iztn1mUrYkSlnb2u26fm5IlGadUtaXKD1w8bHrr5cuGV_7VmaZhy-W6NMvXPz2NH6KJ2dnrAfKjJ25Y41Vnyi8NrZQ3inMKgNb29-UnWEgCD3qDd-UyvakeFlZgk1TK6U-DWGlEGErC3NkCmElO5FfRtC1yLwzXlzbKbiw2nrQJuEdaMS-7MhOZeiYlsn2ZCt1JkXO3bzpAezsNGZvePja33hkSjFhTvYSW-3xGYU7_mW5Sf-1eNgt7ta_r3d_2uF6td49LLdbWH3dwAIeF5vdOv32-2IDj982j1-3y48L3Z00FVin-DmiYColu7ICEvt9_GLfomGDB0zk4AqypUvNDxpalv3FSiR0NsrnYT4LZ2yE8yCeJdSf-bNgVM2DKPRZEIUzNmF57Cf5ZJbE0yiLkyJK2KEY8blFOfCDMJhE0yDw8mRyCGiQ0SQscjoryMTHhvHas0Z4UpUjrnWH83g6m0Wjmh2w1u5nHqUCj-CENg-j-5Ga2zPjQ1dqMvFrro2-3mK4qXGuZYPXJmFx1pU8iuHXiHN3aBZ61Kl6XhnTakt4uiJ0VXJTdQcvkw2hK8fw_jFulfwvZobQlbNHE7py9v4vAAD___uPMQM">