FYI: Unable to build -r501994 ports' devel/llvm60 on clang 8 based powerpc64 system: "BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935"

[Mark Millard]

On 2019-May-19, at 11:06, Dimitry Andric <dim at FreeBSD.org> wrote:

> On 19 May 2019, at 16:56, Mark Millard via freebsd-toolchain <freebsd-toolchain at freebsd.org> wrote:
>> This was in a poudriere bulk build on a head -r347549 based powerpc64
>> system with system clang 8 for cc and c++ and base/binutils
>> for the likes of ld. (The system has the llvm libunwind patches
>> for powerpc64 so throwing c++ exceptions work.)
>> 
>> [4397/4552] : && /usr/bin/c++ -fPIC -O2 -pipe -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -DNDEBUG -isystem /usr/local/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -fcolor-diagnostics -ffunction-sections -fdata-sections -O2 -pipe -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -DNDEBUG -isystem /usr/local/include  -fstack-protector-strong   -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 && :
>> FAILED: lib/libLTO.so.6.0.1
>> : && /usr/bin/c++ -fPIC -O2 -pipe -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -DNDEBUG -isystem /usr/local/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -fcolor-diagnostics -ffunction-sections -fdata-sections -O2 -pipe -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing  -DNDEBUG -isystem /usr/local/include  -fstack-protector-strong   -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/loc
>> al/lib" lib/libLLVM-6.0.so && :
>> /usr/bin/powerpc64-unknown-freebsd13.0-ld: BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935
>> /usr/bin/powerpc64-unknown-freebsd13.0-ld: BFD (GNU Binutils) 2.32 assertion fail elflink.c:2935
> 
> See <https://bugs.freebsd.org/237068>.  I think this is a BFD ld bug,
> but I still haven't been able to come up with a small test case.  Any
> help appreciated. :-)

(Also noted in bugzilla comment #13:)

The following 2 link commands, producing and
using an vastly-smaller lib/libLLVM-6.0.so
reproduce the messages:

"/usr/bin/powerpc64-unknown-freebsd13.0-ld" \
"-Bshareable" \
"-o" "lib/libLLVM-6.0.so" \
"/usr/lib/crtbeginS.o" \
"--version-script" "/wrkdirs/usr/ports/devel/llvm60/work/.build/./lib/tools/llvm-shlib/simple_version_script.map" \
"--whole-archive" \
"lib/libLLVMCore.a" \
"--no-whole-archive" \
"-lm"

/usr/bin/powerpc64-unknown-freebsd13.0-ld \
"-Bshareable" \
"-o" "lib/libLTO.so.6.0.1" \
"lib/libLLVM-6.0.so"

It looks like lib/libLLVMCore.a would be next for
making it smaller.


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