Date: Thu, 22 Oct 2015 16:55:25 -0400 From: Rich Felker <dalias@...c.org> To: Sebastian Gottschall <s.gottschall@...wrt.com> Cc: musl@...ts.openwall.com Subject: Re: __write alias missing on arm platforms 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. Rich
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