Re: Gold linker build failures

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On 10/05/2016 05:33 AM, Jason Zaman wrote:
> Hey all,
> 
> libsepol (and probably the rest) fail when using ld.gold for me. We should
> probably start supporting gold since it looks like things are slowly moving
> towards using it by default. Gentoo and fedora both look like they have a way
> to switch to it but for now the default is still ld.bfd. I dont think I'll have
> much time to take a stab at this for a quite a while and don't know much about
> linker scripts and versioned symbols either.
> 
> On fedora this should switch: /usr/sbin/alternatives --set ld /usr/bin/ld.gold
> 
> On Gentoo:
> # binutils-config --linker ld.gold
> # ld --version
> GNU gold (Gentoo 2.25.1 p1.1 2.25.1) 1.11
> Copyright (C) 2014 Free Software Foundation, Inc.
> This program is free software; you may redistribute it under the terms of
> the GNU General Public License version 3 or (at your option) a later version.
> This program has absolutely no warranty.
> 
> 
> cc -g3 -O0 -gdwarf-2 -fno-strict-aliasing -Wall -Wshadow -Werror -I. -I../include -D_GNU_SOURCE -I../cil/include -fPIC -DSHARED -c -o ../cil/src/cil_verify.lo ../cil/src/cil_verify.c
> cp libsepol.map.in libsepol.map
> cc -g3 -O0 -gdwarf-2 -fno-strict-aliasing -Wall -Wshadow -Werror -I. -I../include -D_GNU_SOURCE -I../cil/include -g -shared -o libsepol.so.1 assertion.lo avrule_block.lo avtab.lo boolean_record.lo booleans.lo conditional.lo constraint.lo context.lo context_record.lo debug.lo ebitmap.lo expand.lo genbools.lo genusers.lo handle.lo hashtab.lo hierarchy.lo iface_record.lo interfaces.lo link.lo mls.lo module.lo module_to_cil.lo node_record.lo nodes.lo polcaps.lo policydb.lo policydb_convert.lo policydb_public.lo port_record.lo ports.lo roles.lo services.lo sidtab.lo symtab.lo user_record.lo users.lo util.lo write.lo ../cil/src/cil.lo ../cil/src/cil_binary.lo ../cil/src/cil_build_ast.lo ../cil/src/cil_copy_ast.lo ../cil/src/cil_find.lo ../cil/src/cil_fqn.lo ../cil/src/cil_lexer.lo ../cil/src/cil_list.lo ../cil/src/cil_log.lo ../cil/src/cil_mem.lo ../cil/src/cil_parser.lo ../cil/src/cil_policy.lo ../cil/src/cil_post.lo ../cil/src/cil_reset_ast.lo ../cil/src/cil_resolve_ast.lo ../cil/src/cil_stack.lo ../cil/src/cil_strpool.lo ../cil/src/cil_symtab.lo ../cil/src/cil_tree.lo ../cil/src/cil_verify.lo -Wl,-soname,libsepol.so.1,--version-script=libsepol.map,-z,defs
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/../../../../x86_64-pc-linux-gnu/bin/ld: warning: wildcard match appears in both version 'LIBSEPOL_1.0' and 'LIBSEPOL_1.1' in script
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.3/../../../../x86_64-pc-linux-gnu/bin/ld: error: symbol cil_build_policydb has undefined version 
> collect2: error: ld returned 1 exit status
> Makefile:42: recipe for target 'libsepol.so.1' failed
> make[2]: *** [libsepol.so.1] Error 1

I could reproduce and fix the wildcard match error - that's clearly a
bug in the map files.  I don't see the second error though on Fedora
with GNU gold version 2.26.1, and I'm not clear on what the underlying
issue is.


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