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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/111141] Compiling gcc-13.2.0 on Ubuntu 22.04.3 LTS,
 problem asm-generic/errno.h
Date: Thu, 24 Aug 2023 21:03:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111141

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think we should improve the toplevel configure to error out if including
errno.h fails.

So instead of:
```
    echo "int main () { return 0; }" > conftest.c
```

We should do:
```
    echo "#include <errno.h>" > conftest.c
    echo "int main () { return 0; }" >> conftest.c
```

I don't have a way to test this but this should at least cause the failure =
to
happen earlier during configure rather than later on.=