"unrecognized relocation" error in FreeBSD with GCC 4 and 5
Closed this issue · 3 comments
We recently started observing a new bug in the FreeBSD toolchain with GCC 4 and 5:
% julia -e 'using BinaryBuilderBase; BinaryBuilderBase.runshell(Platform("x86_64", "freebsd"); preferred_gcc_version=v"4")'
sandbox:${WORKSPACE} # make -C /usr/share/testsuite/
make: Entering directory '/usr/share/testsuite'
make[1]: Entering directory '/usr/share/testsuite/c/dyn_link'
x86_64-unknown-freebsd11.1-cc -shared -o /tmp/testsuite/x86_64-unknown-freebsd11.1/c/dyn_link/libfoo/libfoo.so -fPIC -g -O2 -lm libfoo/libfoo.c
x86_64-unknown-freebsd11.1-cc -o /tmp/testsuite/x86_64-unknown-freebsd11.1/c/dyn_link/dyn_link -I/usr/share/testsuite/c/dyn_link/libfoo -fPIC -g -O2 -Wl,-z,origin -Wl,-rpath,$ORIGIN/libfoo -L/tmp/testsuite/x86_64-unknown-freebsd11.1/c/dyn_link/libfoo -lfoo dyn_link.c
make[1]: Leaving directory '/usr/share/testsuite/c/dyn_link'
make[1]: Entering directory '/usr/share/testsuite/c/hello_world'
x86_64-unknown-freebsd11.1-cc -o /tmp/testsuite/x86_64-unknown-freebsd11.1/c/hello_world/hello_world -g -O2 hello_world.c
make[1]: Leaving directory '/usr/share/testsuite/c/hello_world'
make[1]: Entering directory '/usr/share/testsuite/c/openmp'
gcc -o /tmp/testsuite/x86_64-unknown-freebsd11.1/c/openmp/openmp -g -O2 -fopenmp openmp.c
make[1]: Leaving directory '/usr/share/testsuite/c/openmp'
make[1]: Entering directory '/usr/share/testsuite/cxx/dyn_link'
x86_64-unknown-freebsd11.1-c++ -shared -o /tmp/testsuite/x86_64-unknown-freebsd11.1/cxx/dyn_link/librepeater/librepeater.so -fPIC -g -O2 -lm librepeater/librepeater.cc
x86_64-unknown-freebsd11.1-c++ -o /tmp/testsuite/x86_64-unknown-freebsd11.1/cxx/dyn_link/dyn_link -I/usr/share/testsuite/cxx/dyn_link/librepeater -fPIC -g -O2 -Wl,-z,origin -Wl,-rpath,$ORIGIN/librepeater -L/tmp/testsuite/x86_64-unknown-freebsd11.1/cxx/dyn_link/librepeater -lrepeater dyn_link.cc
/opt/x86_64-unknown-freebsd11.1/bin/x86_64-unknown-freebsd11.1-ld: /tmp/dyn_link-4e028c.o: unrecognized relocation (0x2a) in section `.text'
/opt/x86_64-unknown-freebsd11.1/bin/x86_64-unknown-freebsd11.1-ld: final link failed: Bad value
clang-12: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [Makefile:8: /tmp/testsuite/x86_64-unknown-freebsd11.1/cxx/dyn_link/dyn_link] Error 1
make[1]: Leaving directory '/usr/share/testsuite/cxx/dyn_link'
make: *** [Makefile:45: build-project-cxx-dyn_link] Error 2
make: Leaving directory '/usr/share/testsuite'
sandbox:${WORKSPACE} #You can observe the same with preferred_gcc_version=v"5", but no other versions. I'm not really sure why this depends on the version of GCC, maybe that's a proxy for something like binutils? Also, I have no clue why we're seeing this now (v0.6.10 currently), I believe this wasn't an issue until some time ago and we didn't change anything in FreeBSD specifically lately. I'll try to bisect the issue.
'm not really sure why this depends on the version of GCC, maybe that's a proxy for something like binutils?
It turns out I was right and this issue is also already mentioned in our very own documentation: LLVMBootstrap 12 was built with GCCBootstrap 7 because of #112 (comment), and ld from GCCBootstrap 4-5 can't link those objects.
Strictly speaking, this isn't fixed, but #160 makes sure we never use GCC 4-5 together with LLVM 12 for FreeBSD, so that this shouldn't be a problem in practice: if a user really needs GCC 4-5 they can request an older LLVM 11, if they are going to compile only with LLVM then the actual version of GCC shouldn't matter much but at least they get a working binutils. For these reasons, I'm going to close this ticket.