Re: [PATCH] Raise the minimum GCC version to 5.2
From: Arnd Bergmann <arnd@arndb.de>
Date: 2021-05-03 09:58:20
Also in:
linux-arm-kernel, linux-kbuild, linux-riscv, linuxppc-dev, lkml
On Mon, May 3, 2021 at 2:44 AM Segher Boessenkool [off-list ref] wrote:
On Sun, May 02, 2021 at 02:23:01PM -0700, Joe Perches wrote:quoted
On Sun, 2021-05-02 at 15:32 -0500, Segher Boessenkool wrote:quoted
On Sun, May 02, 2021 at 01:00:28PM -0700, Joe Perches wrote:[]quoted
quoted
Perhaps 8 might be best as that has a __diag warning control mechanism.I have no idea what you mean?? read the last bit of compiler-gcc.hAh, you mean #pragma GCC diagnostic (which has existed since GCC 4.2). Does anything in this __diag stuff require GCC 8? Other than that this is hardcoded here :-)
The '8' was just a kernel thing, we made it configurable to have version
specific warnings, and I have a header file that adds these macros
for all supported compilers, but the version that is in mainline only does
it for gcc-8 or later.
Early compilers only supported "#pragma GCC diagnostic", but I think
even gcc-4.6 supported the _Pragma() syntax that lets you do it inside
of a macro.
It's something we should improve with plumbing on top, e.g. I want
a macro that lets you locally turn off both -Woverride-init on gcc
and -Winitializer-overrides on clang. It's not a reason to mandate
a newer compiler though.
Arnd