Date: Thu, 5 Nov 2015 13:38:11 +0100 From: Szabolcs Nagy <nsz@...t70.net> To: musl@...ts.openwall.com, Rich Felker <dalias@...c.org> Subject: Re: __write alias missing on arm platforms * Szabolcs Nagy <nsz@...t70.net> [2015-10-22 23:26:51 +0200]: > * Sebastian Gottschall <s.gottschall@...wrt.com> [2015-10-22 23:18:54 +0200]: > > Am 22.10.2015 um 22:55 schrieb Rich Felker: > > >On Thu, Oct 22, 2015 at 10:21:54PM +0200, Sebastian Gottschall wrote: > > >>musl is missing the __write function which seem to be a alias to "write". > > >>this is required by libgcc on arm platforms. under some conditions > > >>the compiler will generate code which does reference > > >>this function then which leads to unresolved symbols > > >>(seen on squid 4.0.1 on xscale) > > >> > > >>/home/xfs/toolchains/toolchain-armeb_xscale_gcc-5.2.0_musl-1.1.11/bin/../lib64/gcc/armeb-openwrt-linux-muslgnueabi/5.2.0/libgcc.a(linux-atomic-64bit.o): > > >>In function `__check_for_sync8_kernelhelper': > > >>/home/xfs/openwrt/trunk2/trunk/build_dir/toolchain-armeb_xscale_gcc-5.2.0_musl-1.1.11/gcc-5.2.0/libgcc/config/arm/linux-atomic-64bit.c:59: > > >>undefined reference to `__write' > > >>collect2: error: ld returned 1 exit status > > >>l > > >__write is not a public API even in glibc as far as I can tell. This > > >looks like an abuse of an accidentally-public symbol by libgcc. For > > >musl target anyway it should just be patched out of libgcc, e.g. with > > >#ifdef. > > you mean i have to send a bug report to GCC maintainers? i its part if the > > libgcc sourcecode and is not provided by libgcc, but just referenced > > i checked uclibc and glibc. both define __write as alias for write just > > because of libgcc > > > > so lets declare musl as broken on arm if gcc is used, if this is a solution > > for you :-) > > > > i will submit a bug report about this. > > it should be fixed in gcc, __write is not this patch should fix your problem: https://gcc.gnu.org/ml/gcc-patches/2015-11/msg00456.html
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