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From:   Junio C Hamano <gitster@pobox.com>
To:     Immolo <immoloism@googlemail.com>
Cc:     git@vger.kernel.org
Subject: Re: [Bug Report] Git fails to compile with fortify-headers and LTO
 - error: inlining failed in call to 'always_inline' 'fwrite': function
 body can be overwritten at link time
References: <CAHfWF5n5kk1bYdU4qKTF3n_Ad9BGjwbbmm+0ZQEX=1NZzRiWXA@mail.gmail.com>
Date:   Tue, 18 Jul 2023 16:13:02 -0700
In-Reply-To: <CAHfWF5n5kk1bYdU4qKTF3n_Ad9BGjwbbmm+0ZQEX=1NZzRiWXA@mail.gmail.com>
        (Immolo's message of "Wed, 19 Jul 2023 00:06:50 +0100")
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Immolo <immoloism@googlemail.com> writes:

> /usr/include/fortify/stdio.h: In function 'verify_cache':
> /usr/include/fortify/stdio.h:59:28: error: inlining failed in call to
> 'always_inline' 'fwrite': function body can be overwritten at link
> time
>    59 | _FORTIFY_FN(fwrite) size_t fwrite(const void *__d, size_t __n,
> size_t __m, FILE *__f)
>       |                            ^
> cache-tree.c:175:33: note: called from here
>   175 |                                 fprintf(stderr, "...\n");
>       |                                 ^

It looks like a plain vanilla invocation of fprintf(), unlike from
any random application, a user of the standard C runtime library .
Is this a bug to be reported here, or would it be more valuable and
useful if reported to GCC or Fortify folks, I wonder?