linux-kernel - Re: [PATCH v2] compiler-gcc.h: Disable _

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Message-ID: <CAMuHMdVkw+G6-YjDO_7F6xtgJCBfjKF8T=HuHzQuHbcJK6sp4g@mail.gmail.com>
Date: Thu, 3 Oct 2024 14:18:06 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Andreas Schwab <schwab@...ux-m68k.org>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, 
	Tony Ambardar <tony.ambardar@...il.com>, Daniel Borkmann <daniel@...earbox.net>, 
	Miguel Ojeda <ojeda@...nel.org>, Jiri Olsa <jolsa@...nel.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] compiler-gcc.h: Disable __retain on gcc-11

On Thu, Oct 3, 2024 at 2:11 PM Andreas Schwab <schwab@...ux-m68k.org> wrote:
> On Okt 03 2024, Miguel Ojeda wrote:
>
> > Otherwise, does it mean we need a build-time test?
>
> A simple gcc version test definitely does not suffice.
>
> The suport for retain also depends on HAVE_INITFINI_ARRAY_SUPPORT, which
> is usually enabled by default (depends on glibc support, but that is
> much older), but can be disabled with --disable-initfini-array.

FTR, no --disable-initfini-array seen here:

$ arm-linux-gnueabihf-gcc-11 -v
Using built-in specs.
COLLECT_GCC=/usr/bin/arm-linux-gnueabihf-gcc-11
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/11/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
11.4.0-1ubuntu1~22.04'
--with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2
--prefix=/usr --with-gcc-major-version-only --program-suffix=-11
--enable-shared --enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --libdir=/usr/lib
--enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-libitm --disable-libquadmath --disable-libquadmath-support
--enable-plugin --enable-default-pie --with-system-zlib
--enable-libphobos-checking=release --without-target-system-zlib
--enable-multiarch --disable-sjlj-exceptions --with-arch=armv7-a+fp
--with-float=hard --with-mode=thumb --disable-werror
--enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabihf
--program-prefix=arm-linux-gnueabihf-
--includedir=/usr/arm-linux-gnueabihf/include
--with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds