From: Yann E. MORIN <yann.morin.1998@free.fr>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 2/2] package/libunwind: disable for x86 with uClibc toolchain
Date: Mon, 17 Apr 2017 11:25:50 +0200 [thread overview]
Message-ID: <20170417092550.GA3441@scaer> (raw)
In-Reply-To: <20170416194906.9842-2-romain.naour@gmail.com>
On 2017-04-16 21:49 +0200, Romain Naour spake thusly:
> libunwind use sigreturn() while building for x86 [1] but this function
> is not available with uClibc-ng.
>
> This throw a warning during libunwind build:
> In file included from x86/Los-linux.c:4:0:
> x86/Gos-linux.c: In function ?_ULx86_local_resume?:
> x86/Gos-linux.c:298:7: warning: implicit declaration of function ?sigreturn? [-Wimplicit-function-declaration]
> sigreturn (sc);
> ^
>
> But any program trying to link against libunwind-generic.so fail to build:
It's not only about libunwind-generic.so, see below...
> [...]usr/lib/libunwind-generic.so: undefined reference to `sigreturn'
> collect2: error: ld returned 1 exit status
>
> Disable libunwind for x86 target when uClibc-ng is used.
>
> Fixes:
> http://autobuild.buildroot.net/results/54a/54afac8148cff5f3c17e83f80917fd9006948fe0//build-end.log
... as it lso fixes:
http://autobuild.buildroot.org/results/0d1/0d1da7fa32b2f659816c51a05de96f26fef163e4/build-end.log
[...]/output/host/usr/i686-buildroot-linux-uclibc/sysroot/usr/lib/libunwind.so:
undefined reference to `sigreturn'
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Regards,
Yann E. MORIN.
>
> [1] http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob;f=src/x86/Gos-linux.c;h=17aebc2974af50eb0bf8292689b2ed22a4c97866;hb=HEAD#l299
>
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
> package/libunwind/Config.in | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/package/libunwind/Config.in b/package/libunwind/Config.in
> index 5527a2b..9007ce5 100644
> --- a/package/libunwind/Config.in
> +++ b/package/libunwind/Config.in
> @@ -15,7 +15,7 @@ config BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS
> BR2_mips64el || BR2_powerpc || BR2_sh || BR2_i386 || BR2_x86_64)
> default y if BR2_TOOLCHAIN_USES_UCLIBC && \
> (((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
> - BR2_i386 || BR2_mips || BR2_mipsel || \
> + BR2_mips || BR2_mipsel || \
> BR2_mips64 || BR2_mips64el || BR2_x86_64)
> default y if BR2_TOOLCHAIN_USES_MUSL && \
> (((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
> --
> 2.9.3
>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
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next prev parent reply other threads:[~2017-04-17 9:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-16 19:49 [Buildroot] [PATCH 1/2] package/efl: add libunwind optional dependency Romain Naour
2017-04-16 19:49 ` [Buildroot] [PATCH 2/2] package/libunwind: disable for x86 with uClibc toolchain Romain Naour
2017-04-17 9:25 ` Yann E. MORIN [this message]
2017-04-17 13:09 ` [Buildroot] [PATCH 1/2] package/efl: add libunwind optional dependency Thomas Petazzoni
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