32-bit powerpc: gcc8 unable to build devel/llvm60: "/usr/local/bin/ld: BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935"

[Mark Millard]

My ports-mgmt/pouriere-devel based build attempt for building devel/llvm60 failed
with:

[00:00:53] [01] [00:00:00] Building devel/llvm60 | llvm60-6.0.1_6
[02:05:13] [01] [02:04:20] Saved devel/llvm60 | llvm60-6.0.1_6 wrkdir to: /usr/local/poudriere/data/wrkdirs/FBSDpowerpc-default/default/llvm60-6.0.1_6.tbz
[02:05:14] [01] [02:04:21] Finished devel/llvm60 | llvm60-6.0.1_6: Failed: build
[02:05:30] Stopping 1 builders

The log shows:

[3365/4552] : && /usr/local/bin/g++8 -fPIC -O2 -pipe  -DNDEBUG -Wl,-rpath=/usr/local/lib/gcc8  -DNDEBUG -D_GLIBCXX_USE_C99 -Wl,-rpath=/usr/local/lib/gcc8 -isystem /usr/local/include -fPIC -fvisibility
-inlines-hidden -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-v
irtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O2 -pipe  -DNDEBUG -Wl,-rpath=/usr/local/lib/gcc8  -DNDEBUG -D_GLIBCXX_USE_C99 -Wl,-rpath=/usr/local/lib/gcc8 -isystem /usr/local/include 
 -Wl,-rpath=/usr/local/lib/gcc8 -L/usr/local/lib/gcc8   -Wl,-z,origin  -Wl,-O3 -Wl,--gc-sections  -Wl,--version-script,/wrkdirs/usr/ports/devel/llvm60/work/.build/tools/lto/LTO.exports -shared -Wl,-so
name,libLTO.so.6 -o lib/libLTO.so.6.0.1 tools/lto/CMakeFiles/LTO.dir/LTODisassembler.cpp.o tools/lto/CMakeFiles/LTO.dir/lto.cpp.o -L/usr/local/lib -Wl,-rpath,"\$ORIGIN/../lib:/usr/local/lib" lib/libLL
VM-6.0.so && :
FAILED: lib/libLTO.so.6.0.1 
: && /usr/local/bin/g++8 -fPIC -O2 -pipe  -DNDEBUG -Wl,-rpath=/usr/local/lib/gcc8  -DNDEBUG -D_GLIBCXX_USE_C99 -Wl,-rpath=/usr/local/lib/gcc8 -isystem /usr/local/include -fPIC -fvisibility-inlines-hid
den -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor 
-Wno-comment -ffunction-sections -fdata-sections -O2 -pipe  -DNDEBUG -Wl,-rpath=/usr/local/lib/gcc8  -DNDEBUG -D_GLIBCXX_USE_C99 -Wl,-rpath=/usr/local/lib/gcc8 -isystem /usr/local/include  -Wl,-rpath=
/usr/local/lib/gcc8 -L/usr/local/lib/gcc8   -Wl,-z,origin  -Wl,-O3 -Wl,--gc-sections  -Wl,--version-script,/wrkdirs/usr/ports/devel/llvm60/work/.build/tools/lto/LTO.exports -shared -Wl,-soname,libLTO.
so.6 -o lib/libLTO.so.6.0.1 tools/lto/CMakeFiles/LTO.dir/LTODisassembler.cpp.o tools/lto/CMakeFiles/LTO.dir/lto.cpp.o -L/usr/local/lib -Wl,-rpath,"\$ORIGIN/../lib:/usr/local/lib" lib/libLLVM-6.0.so &&
 :
/usr/local/bin/ld: BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935
/usr/local/bin/ld: BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935
collect2: error: ld returned 1 exit status
. . .

The assert seems to be the last BFD_ASSERT shown below:

 /* If this is a weak defined symbol in a dynamic object, and we know
     the real definition in the dynamic object, copy interesting flags
     over to the real definition.  */
  if (h->is_weakalias)
    {
      struct elf_link_hash_entry *def = weakdef (h);
   
      /* If the real definition is defined by a regular object file,
         don't do anything special.  See the longer description in
         _bfd_elf_adjust_dynamic_symbol, below.  */
      if (def->def_regular)
        {
          h = def;
          while ((h = h->u.alias) != def)
            h->is_weakalias = 0;
        }
      else
        {
          while (h->root.type == bfd_link_hash_indirect)
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
          BFD_ASSERT (h->root.type == bfd_link_hash_defined
                      || h->root.type == bfd_link_hash_defweak);
          BFD_ASSERT (def->def_dynamic);
          BFD_ASSERT (def->root.type == bfd_link_hash_defined);
          (*bed->elf_backend_copy_indirect_symbol) (eif->info, def, h);
        }
. . .


Context:

# uname -apKU
FreeBSD FBSDG4S 13.0-CURRENT FreeBSD 13.0-CURRENT #14 r344955M: Fri Mar  8 22:39:44 PST 2019     markmi at FBSDFSSD:/usr/obj/powerpcvtsc_clang_gcc421/powerpc.powerpc/usr/src/powerpc.powerpc/sys/GENERICvtsc-NODBG  powerpc powerpc 1300014 1300014

(The 32-bit powerpc is running a gcc 4.2.1 based system. amd64 system-clang built the
bootstrap gcc 4.2.1 toolchain, which in turn built the system. The 32-bit FreeBSD was
running on  a PowerMac G5 [2-sockets, 2 cores each].)

# svnlite info /usr/ports/ | grep 'Re[plv]'
Relative URL: ^/head
Repository Root: svn://svn0.us-west.freebsd.org/ports
Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5
Revision: 495006
Last Changed Rev: 495006




===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)