Re: BPF in linux-libre

[John Soo <jsoo1@asu.edu>]

Hi Mathieu and Guix,

I think I understand this error a little better now.  It seems like zlib is
not being resolved correctly.

/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/bin/c++  -O2 -g -DNDEBUG  -rdynamic CMakeFiles/bpftrace.dir/attached_probe.cpp.o CMakeFiles/bpftrace.dir/bpffeature.cpp.o CMakeFiles/bpftrace.dir/bpftrace.cpp.o CMakeFiles/bpftrace.dir/btf.cpp.o CMakeFiles/bpftrace.dir/clang_parser.cpp.o CMakeFiles/bpftrace.dir/disasm.cpp.o CMakeFiles/bpftrace.dir/driver.cpp.o CMakeFiles/bpftrace.dir/fake_map.cpp.o CMakeFiles/bpftrace.dir/list.cpp.o CMakeFiles/bpftrace.dir/lockdown.cpp.o CMakeFiles/bpftrace.dir/main.cpp.o CMakeFiles/bpftrace.dir/map.cpp.o CMakeFiles/bpftrace.dir/mapkey.cpp.o CMakeFiles/bpftrace.dir/output.cpp.o CMakeFiles/bpftrace.dir/printf.cpp.o CMakeFiles/bpftrace.dir/resolve_cgroupid.cpp.o CMakeFiles/bpftrace.dir/signal.cpp.o CMakeFiles/bpftrace.dir/struct.cpp.o CMakeFiles/bpftrace.dir/tracepoint_format_parser.cpp.o CMakeFiles/bpftrace.dir/types.cpp.o CMakeFiles/bpftrace.dir/utils.cpp.o CMakeFiles/bpftrace.dir/bfd-disasm.cpp.o  -o bpftrace  -Wl,-rpath,::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -Wl,-Bstatic -lbfd -lopcodes arch/libarch.a ast/libast.a ../libparser.a ../resources/libresources.a -Wl,-Bdynamic -lbcc -lelf arch/libarch.a /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMOrcJIT.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMJITLink.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMMCJIT.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMExecutionEngine.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMRuntimeDyld.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libclang.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMXCoreDisassembler.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMXCoreCodeGen.so.9 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/gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMMCParser.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMBitReader.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMBitstreamReader.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMBPFDesc.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMMC.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMDebugInfoCodeView.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMDebugInfoMSF.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMBPFInfo.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMCore.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMRemarks.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMBinaryFormat.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMSupport.so.9 /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libLLVMDemangle.so.9 
ld: /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libbfd.a(compress.o): undefined reference to symbol 'inflateEnd'
ld: /gnu/store/80y2wbx9lrhvwp41nnyjjsb4g9ff8avn-clang-toolchain-9.0.1/lib/libz.so.1: error adding symbols: DSO missing from command line
pft\x03

I added zlib to the inputs of bpftrace but still the same error.  Are
there any CMake experts out there that can tell if there is a flag or
option to use here? Is this an upstream issue?

Thanks!

- John