From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: Norbert Lange <nolange79@gmail.com>
Cc: buildroot@busybox.net
Subject: Re: [Buildroot] [PATCH v2 4/4] package/glibc: force -fno-lto
Date: Sun, 9 Jan 2022 23:31:45 +0100 [thread overview]
Message-ID: <20220109223145.GK1477939@scaer> (raw)
In-Reply-To: <20201017221743.160029-4-nolange79@gmail.com>
Norbert, All,
On 2020-10-18 00:17 +0200, Norbert Lange spake thusly:
> glibc requires compilation barriers between files, and will
> fail with LTO enabled.
> So force LTO off by appending -fno-lto to the flags, but only
> if the GCC version is recent enough that an LTO build would
> be possible.
>
> Signed-off-by: Norbert Lange <nolange79@gmail.com>
Applied to master, thanks.
Are the other C libraries (uClibc, musl) also affected by such an issue?
Regards,
Yann E. MORIN.
> ---
> package/glibc/glibc.mk | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk
> index 4721177d83..6d07495edc 100644
> --- a/package/glibc/glibc.mk
> +++ b/package/glibc/glibc.mk
> @@ -67,6 +67,11 @@ ifeq ($(BR2_ENABLE_DEBUG),y)
> GLIBC_EXTRA_CFLAGS += -g
> endif
>
> +# glibc explicitly requires compile barriers between files
> +ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_4_7),y)
> +GLIBC_EXTRA_CFLAGS += -fno-lto
> +endif
> +
> # The stubs.h header is not installed by install-headers, but is
> # needed for the gcc build. An empty stubs.h will work, as explained
> # in http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html. The same trick
> --
> 2.28.0
--
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next prev parent reply other threads:[~2022-01-09 22:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-17 22:17 [Buildroot] [PATCH v2 1/4] package/Makefile.in: use gcc wrappers for binutils tools Norbert Lange
2020-10-17 22:17 ` [Buildroot] [PATCH v2 2/4] package/gcc: use binutils wrappers for target libs Norbert Lange
2022-01-09 15:16 ` Yann E. MORIN
2022-01-09 21:08 ` Norbert Lange
2022-01-10 10:43 ` Arnout Vandecappelle
2022-01-25 21:13 ` Arnout Vandecappelle
2020-10-17 22:17 ` [Buildroot] [PATCH v2 3/4] package/busybox: explicitly state binutil paths Norbert Lange
2022-01-09 15:09 ` Yann E. MORIN
2020-10-17 22:17 ` [Buildroot] [PATCH v2 4/4] package/glibc: force -fno-lto Norbert Lange
2022-01-09 22:31 ` Yann E. MORIN [this message]
2022-01-09 23:09 ` Norbert Lange
2022-01-10 7:29 ` Arnout Vandecappelle
2022-01-09 15:08 ` [Buildroot] [PATCH v2 1/4] package/Makefile.in: use gcc wrappers for binutils tools Yann E. MORIN
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