<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/100964>100964</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc][x86-64] missing entrypoints' definition in full build mode
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            libc
      </td>
    </tr>

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

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

<pre>
    Recent patch lands that the `<math.h>` inclusion is replaced by `"hdr/math_macros.h"`. However, as the name suggestions, the new proxy header does not provide correct definitions for entrypoints. They should be included separately. This leads to the following unhappiness of our build bots:

```
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:31:32: error: use of undeclared identifier 'isnan'
 ASSERT_NE(static_cast<int>(isnan(nan)), 0);
 ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:42:32: error: use of undeclared identifier 'isnan'
 ASSERT_NE(static_cast<int>(isnan(nan)), 0);
 ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:53:32: error: use of undeclared identifier 'isnan'
 ASSERT_NE(static_cast<int>(isnan(nan)), 0);
 ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:64:32: error: use of undeclared identifier 'isnan'
 ASSERT_EQ(static_cast<int>(isnan(valid)), 0);
 ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:74:32: error: use of undeclared identifier 'isnan'
 ASSERT_EQ(static_cast<int>(isnan(valid)), 0);
 ^
/home/llvm-libc-buildbot/buildbot-worker/libc-x86_64-debian-fullbuild/libc-x86_64-debian-fullbuild-dbg/llvm-project/libc/test/utils/FPUtil/x86_long_double_test.cpp:84:32: error: use of undeclared identifier 'isnan'
 ASSERT_EQ(static_cast<int>(isnan(valid)), 0);
 ^
```
</pre>
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