linux-kernel - Re: [PATCH] kbuild: make Clang build userprogs for target architecture

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Message-ID: <CANiq72nE+1F3yM+e9XzfphzOe3mb9DUcRCAtPuLMyFE4Rh38pg@mail.gmail.com>
Date:   Tue, 30 Jun 2020 21:12:54 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Sam Ravnborg <sam@...nborg.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] kbuild: make Clang build userprogs for target architecture

On Tue, Jun 30, 2020 at 6:26 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> I can reproduce this in the following
> simple test code:
>
>
> ----------------->8----------------
> #include <stdio.h>
>
> int main(void)
> {
>         ssize_t x = 1;
>
>         printf("%zd", x);
>
>         return 0;
> }
> --------------->8-------------------

That is the old implicit int rule. Try including sys/types.h or
compiling with a standard like -std=c99 for instance.

Cheers,
Miguel