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From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
Cc: buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH v2] package/libmpeg2: fix build with GCC 15
Date: Sat, 19 Sep 2026 00:09:39 +0200	[thread overview]
Message-ID: <aq22XrnHaroLUP72@windsurf> (raw)
In-Reply-To: <20260810165106.3930140-1-chakrabortyshubham66@gmail.com>

On Mon, Aug 10, 2026 at 10:21:05PM +0530, Shubham Chakraborty wrote:
> GCC 15 defaults to C23, which no longer supports K&R-style empty
> parameter list declarations used in libmpeg2. To avoid carrying intrusive
> patches that rewrite legacy K&R-style declarations, pass -std=gnu89
> to CFLAGS to restore the older compiler behavior.
> 
> Fixes: http://autobuild.buildroot.net/results/53d/53daf0b4bd8b476252ca219e53a966405ece7e51
> 
> Signed-off-by: Shubham Chakraborty <chakrabortyshubham66@gmail.com>

Thanks a lot, but I'm not able to reproduce the build issue in the
first place. The following defconfig uses gcc15 to build libmpeg2, and
it builds just fine:

BR2_aarch64=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
BR2_TOOLCHAIN_EXTERNAL_URL="https://toolchains.bootlin.com/downloads/releases/toolchains/aarch64/tarballs/aarch64--glibc--stable-2026.08-1.tar.xz"
BR2_TOOLCHAIN_EXTERNAL_GCC_15=y
BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_10=y
BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
# BR2_TOOLCHAIN_EXTERNAL_INET_RPC is not set
BR2_TOOLCHAIN_EXTERNAL_CXX=y
BR2_TOOLCHAIN_EXTERNAL_OPENMP=y
BR2_PACKAGE_LIBMPEG2=y

So... are you sure the problem is simply gcc 15.x? Or are there other
conditions/reasons?

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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  reply	other threads:[~2026-09-18 22:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-21  8:14 [Buildroot] [PATCH] package/libmpeg2: fix build with GCC 15 Shubham Chakraborty
2026-05-31 12:10 ` Thomas Petazzoni via buildroot
2026-08-10 16:51 ` [Buildroot] [PATCH v2] " Shubham Chakraborty
2026-09-18 22:09   ` Thomas Petazzoni via buildroot [this message]
2026-09-20 10:12   ` Thomas Petazzoni via buildroot
2026-09-25 14:43   ` Raphaël Mélotte via buildroot

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