From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Thu, 4 May 2017 23:23:35 +0200 Subject: [Buildroot] [PATCH] package/libunwind: disable for x86 with musl In-Reply-To: <20170417173722.20719-1-romain.naour@gmail.com> References: <20170417173722.20719-1-romain.naour@gmail.com> Message-ID: <20170504232335.6cc82d1b@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello, On Mon, 17 Apr 2017 19:37:22 +0200, Romain Naour wrote: > libunwind use sigreturn() and setcontext() while building for x86 [1] > but this function is not available with musl [2]. > > 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 or > libunwind.so fail to build: > [...]/usr/lib/libunwind-generic.so: undefined reference to `sigreturn' > [...]/usr/lib/libunwind-generic.so: undefined reference to `setcontext' > collect2: error: ld returned 1 exit status > > Disable libunwind for x86 target when musl is used. > > Reported upstream by Waldemar [3] > > [1] http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob;f=src/x86/Gos-linux.c;h=17aebc2974af50eb0bf8292689b2ed22a4c97866;hb=HEAD#l299 > [2] http://openwall.com/lists/musl/2016/02/04/3 > [3] http://lists.nongnu.org/archive/html/libunwind-devel/2017-04/msg00030.html > > Signed-off-by: Romain Naour > Cc: "Yann E. MORIN" > Cc: Waldemar Brodkorb > --- > Patch rebased after http://patchwork.ozlabs.org/patch/751402/ > --- > package/libunwind/Config.in | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Applied to master, thanks. Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com