[Bug] Build failed with undefined reference to 'crc32' on Ubuntu Linux

[dougpuob]

Even I built with -lz option, but it still showed the following error.

• Compression.cpp: undefined reference to `compressBound'
• Compression.cpp: undefined reference to `compress2'
• undefined reference to `uncompress'
• undefined reference to `crc32'

Error Message

[ 35%] Linking CXX executable Output/cppnamelint
/usr/bin/cmake -E cmake_link_script CMakeFiles/cppnamelint.dir/link.txt --verbose=1
/usr/bin/g++-8  -frtti -lz -ltinfo -O3 -DNDEBUG   CMakeFiles/cppnamelint.dir/Source/Main.cpp.o CMakeFiles/cppnamelint.dir/Source/Detection.cpp.o CMakeFiles/cppnamelint.dir/Source/Common.cpp.o CMakeFiles/cppnamelint.dir/Source/Config.cpp.o CMakeFiles/cppnamelint.dir/Source/MyFactory.cpp.o CMakeFiles/cppnamelint.dir/Source/MyAstVisitor.cpp.o CMakeFiles/cppnamelint.dir/Source/MyAstConsumer.cpp.o CMakeFiles/cppnamelint.dir/Source/Test/TestConfig.cpp.o CMakeFiles/cppnamelint.dir/Source/Test/TestDetection.cpp.o  -o Output/cppnamelint  -L/home/dougpuob/my-data/my-repo/llvm-project/8.0.0/build/lib -Wl,-rpath,/home/dougpuob/my-data/my-repo/llvm-project/8.0.0/build/lib Module/docopt.cpp/libdocopt.a lib/libgtest.a lib/libgtest_main.a -lclangAnalysis -lclangARCMigrate -lclangAST -lclangASTMatchers -lclangBasic -lclangCodeGen -lclangCrossTU -lclangDriver -lclangDynamicASTMatchers -lclangEdit -lclangFormat -lclangFrontend -lclangFrontendTool -lclangHandleCXX -lclangHandleLLVM -lclangIndex -lclangLex -lclangParse -lclangRewrite -lclangRewriteFrontend -lclangSema -lclangSerialization -lclangStaticAnalyzerCheckers -lclangStaticAnalyzerCore -lclangStaticAnalyzerFrontend -lclangTooling -lclangToolingASTDiff -lclangToolingCore -lclangToolingInclusions -lclangToolingRefactor -lLLVMAArch64AsmParser -lLLVMAArch64AsmPrinter -lLLVMAArch64CodeGen -lLLVMAArch64Desc -lLLVMAArch64Disassembler -lLLVMAArch64Info -lLLVMAArch64Utils -lLLVMAggressiveInstCombine -lLLVMAMDGPUAsmParser -lLLVMAMDGPUAsmPrinter -lLLVMAMDGPUCodeGen -lLLVMAMDGPUDesc -lLLVMAMDGPUDisassembler -lLLVMAMDGPUInfo -lLLVMAMDGPUUtils -lLLVMAnalysis -lLLVMARMAsmParser -lLLVMARMAsmPrinter -lLLVMARMCodeGen -lLLVMARMDesc -lLLVMARMDisassembler -lLLVMARMInfo -lLLVMARMUtils -lLLVMAsmParser -lLLVMAsmPrinter -lLLVMBinaryFormat -lLLVMBitReader -lLLVMBitWriter -lLLVMBPFAsmParser -lLLVMBPFAsmPrinter -lLLVMBPFCodeGen -lLLVMBPFDesc -lLLVMBPFDisassembler -lLLVMBPFInfo -lLLVMCodeGen -lLLVMCore -lLLVMCoroutines -lLLVMCoverage -lLLVMDebugInfoCodeView -lLLVMDebugInfoDWARF -lLLVMDebugInfoMSF -lLLVMDebugInfoPDB -lLLVMDemangle -lLLVMDlltoolDriver -lLLVMExecutionEngine -lLLVMFuzzMutate -lLLVMGlobalISel -lLLVMHexagonAsmParser -lLLVMHexagonCodeGen -lLLVMHexagonDesc -lLLVMHexagonDisassembler -lLLVMHexagonInfo -lLLVMInstCombine -lLLVMInstrumentation -lLLVMInterpreter -lLLVMipo -lLLVMIRReader -lLLVMLanaiAsmParser -lLLVMLanaiAsmPrinter -lLLVMLanaiCodeGen -lLLVMLanaiDesc -lLLVMLanaiDisassembler -lLLVMLanaiInfo -lLLVMLibDriver -lLLVMLineEditor -lLLVMLinker -lLLVMLTO -lLLVMMC -lLLVMMCDisassembler -lLLVMMCJIT -lLLVMMCParser -lLLVMMipsAsmParser -lLLVMMipsAsmPrinter -lLLVMMipsCodeGen -lLLVMMipsDesc -lLLVMMipsDisassembler -lLLVMMipsInfo -lLLVMMIRParser -lLLVMMSP430AsmPrinter -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMNVPTXAsmPrinter -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMObjCARCOpts -lLLVMObject -lLLVMObjectYAML -lLLVMOption -lLLVMOrcJIT -lLLVMPasses -lLLVMPowerPCAsmParser -lLLVMPowerPCAsmPrinter -lLLVMPowerPCCodeGen -lLLVMPowerPCDesc -lLLVMPowerPCDisassembler -lLLVMPowerPCInfo -lLLVMProfileData -lLLVMRuntimeDyld -lLLVMScalarOpts -lLLVMSelectionDAG -lLLVMSparcAsmParser -lLLVMSparcAsmPrinter -lLLVMSparcCodeGen -lLLVMSparcDesc -lLLVMSparcDisassembler -lLLVMSparcInfo -lLLVMSupport -lLLVMSymbolize -lLLVMSystemZAsmParser -lLLVMSystemZAsmPrinter -lLLVMSystemZCodeGen -lLLVMSystemZDesc -lLLVMSystemZDisassembler -lLLVMSystemZInfo -lLLVMTableGen -lLLVMTarget -lLLVMTestingSupport -lLLVMTransformUtils -lLLVMVectorize -lLLVMWindowsManifest -lLLVMX86AsmParser -lLLVMX86AsmPrinter -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Disassembler -lLLVMX86Info -lLLVMX86Utils -lLLVMXCoreAsmPrinter -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreDisassembler -lLLVMXCoreInfo -lLLVMXRay -lLTO -lclangParse -lclangSerialization -lclangDriver -lclangIndex -lclangSema -lclangAnalysis -lclangAST -lclangFrontend -lclangEdit -lclangLex -lclangBasic -lLLVMSupport -lLLVMCore -lLLVMMC lib/libgtest.a -lpthread -lclangARCMigrate -lclangASTMatchers -lclangCodeGen -lclangCrossTU -lclangDynamicASTMatchers -lclangFormat -lclangFrontendTool -lclangHandleCXX -lclangHandleLLVM -lclangRewrite -lclangRewriteFrontend -lclangStaticAnalyzerCheckers -lclangStaticAnalyzerCore -lclangStaticAnalyzerFrontend -lclangTooling -lclangToolingASTDiff -lclangToolingCore -lclangToolingInclusions -lclangToolingRefactor -lLLVMAArch64AsmParser -lLLVMAArch64AsmPrinter -lLLVMAArch64CodeGen -lLLVMAArch64Desc -lLLVMAArch64Disassembler -lLLVMAArch64Info -lLLVMAArch64Utils -lLLVMAggressiveInstCombine -lLLVMAMDGPUAsmParser -lLLVMAMDGPUAsmPrinter -lLLVMAMDGPUCodeGen -lLLVMAMDGPUDesc -lLLVMAMDGPUDisassembler -lLLVMAMDGPUInfo -lLLVMAMDGPUUtils -lLLVMAnalysis -lLLVMARMAsmParser -lLLVMARMAsmPrinter -lLLVMARMCodeGen -lLLVMARMDesc -lLLVMARMDisassembler -lLLVMARMInfo -lLLVMARMUtils -lLLVMAsmParser -lLLVMAsmPrinter -lLLVMBinaryFormat -lLLVMBitReader -lLLVMBitWriter -lLLVMBPFAsmParser -lLLVMBPFAsmPrinter -lLLVMBPFCodeGen -lLLVMBPFDesc -lLLVMBPFDisassembler -lLLVMBPFInfo -lLLVMCodeGen -lLLVMCoroutines -lLLVMCoverage -lLLVMDebugInfoCodeView -lLLVMDebugInfoDWARF -lLLVMDebugInfoMSF -lLLVMDebugInfoPDB -lLLVMDemangle -lLLVMDlltoolDriver -lLLVMExecutionEngine -lLLVMFuzzMutate -lLLVMGlobalISel -lLLVMHexagonAsmParser -lLLVMHexagonCodeGen -lLLVMHexagonDesc -lLLVMHexagonDisassembler -lLLVMHexagonInfo -lLLVMInstCombine -lLLVMInstrumentation -lLLVMInterpreter -lLLVMipo -lLLVMIRReader -lLLVMLanaiAsmParser -lLLVMLanaiAsmPrinter -lLLVMLanaiCodeGen -lLLVMLanaiDesc -lLLVMLanaiDisassembler -lLLVMLanaiInfo -lLLVMLibDriver -lLLVMLineEditor -lLLVMLinker -lLLVMLTO -lLLVMMCDisassembler -lLLVMMCJIT -lLLVMMCParser -lLLVMMipsAsmParser -lLLVMMipsAsmPrinter -lLLVMMipsCodeGen -lLLVMMipsDesc -lLLVMMipsDisassembler -lLLVMMipsInfo -lLLVMMIRParser -lLLVMMSP430AsmPrinter -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMNVPTXAsmPrinter -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMObjCARCOpts -lLLVMObject -lLLVMObjectYAML -lLLVMOption -lLLVMOrcJIT -lLLVMPasses -lLLVMPowerPCAsmParser -lLLVMPowerPCAsmPrinter -lLLVMPowerPCCodeGen -lLLVMPowerPCDesc -lLLVMPowerPCDisassembler -lLLVMPowerPCInfo -lLLVMProfileData -lLLVMRuntimeDyld -lLLVMScalarOpts -lLLVMSelectionDAG -lLLVMSparcAsmParser -lLLVMSparcAsmPrinter -lLLVMSparcCodeGen -lLLVMSparcDesc -lLLVMSparcDisassembler -lLLVMSparcInfo -lLLVMSymbolize -lLLVMSystemZAsmParser -lLLVMSystemZAsmPrinter -lLLVMSystemZCodeGen -lLLVMSystemZDesc -lLLVMSystemZDisassembler -lLLVMSystemZInfo -lLLVMTableGen -lLLVMTarget -lLLVMTestingSupport -lLLVMTransformUtils -lLLVMVectorize -lLLVMWindowsManifest -lLLVMX86AsmParser -lLLVMX86AsmPrinter -lLLVMX86CodeGen -lLLVMX86Desc -lLLVMX86Disassembler -lLLVMX86Info -lLLVMX86Utils -lLLVMXCoreAsmPrinter -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreDisassembler -lLLVMXCoreInfo -lLLVMXRay -lLTO 
/home/dougpuob/my-data/my-repo/llvm-project/8.0.0/build/lib/libLLVMSupport.a(Compression.cpp.o): In function `llvm::zlib::compress(llvm::StringRef, llvm::SmallVectorImpl<char>&, int)':
Compression.cpp:(.text._ZN4llvm4zlib8compressENS_9StringRefERNS_15SmallVectorImplIcEEi+0x2f): undefined reference to `compressBound'
Compression.cpp:(.text._ZN4llvm4zlib8compressENS_9StringRefERNS_15SmallVectorImplIcEEi+0x52): undefined reference to `compress2'
/home/dougpuob/my-data/my-repo/llvm-project/8.0.0/build/lib/libLLVMSupport.a(Compression.cpp.o): In function `llvm::zlib::uncompress(llvm::StringRef, char*, unsigned long&)':
Compression.cpp:(.text._ZN4llvm4zlib10uncompressENS_9StringRefEPcRm+0x2a): undefined reference to `uncompress'
/home/dougpuob/my-data/my-repo/llvm-project/8.0.0/build/lib/libLLVMSupport.a(Compression.cpp.o): In function `llvm::zlib::crc32(llvm::StringRef)':
Compression.cpp:(.text._ZN4llvm4zlib5crc32ENS_9StringRefE+0xc): undefined reference to `crc32'
collect2: error: ld returned 1 exit status
CMakeFiles/cppnamelint.dir/build.make:306: recipe for target 'Output/cppnamelint' failed
make[2]: *** [Output/cppnamelint] Error 1
make[2]: Leaving directory '/home/dougpuob/my-data/my-repo/cppnamelint.git/Build/linux'
CMakeFiles/Makefile2:69: recipe for target 'CMakeFiles/cppnamelint.dir/all' failed
make[1]: *** [CMakeFiles/cppnamelint.dir/all] Error 2
make[1]: Leaving directory '/home/dougpuob/my-data/my-repo/cppnamelint.git/Build/linux'
Makefile:151: recipe for target 'all' failed
make: *** [all] Error 2

[dougpuob]

$ ldconfig -v 2>/dev/null | grep -v ^$'\t'

/usr/lib/x86_64-linux-gnu/libfakeroot:
/usr/local/lib:
/lib/x86_64-linux-gnu:
/usr/lib/x86_64-linux-gnu:                                    <--**HERE**
/lib32:
/usr/lib32:
/lib:
/usr/lib:

locate command to find libz

 $ locate libz
/lib/x86_64-linux-gnu/libz.so.1
/lib/x86_64-linux-gnu/libz.so.1.2.11
/usr/lib/jvm/java-11-openjdk-amd64/lib/libzip.so
/usr/lib/x86_64-linux-gnu/libz.a                              <--**HERE**
/usr/lib/x86_64-linux-gnu/libz.so
/usr/lib/x86_64-linux-gnu/libzeitgeist-2.0.so.0
/usr/lib/x86_64-linux-gnu/libzeitgeist-2.0.so.0.0.0
/usr/lib/x86_64-linux-gnu/libzmq.so.5
/usr/lib/x86_64-linux-gnu/libzmq.so.5.1.5
/usr/lib/x86_64-linux-gnu/libzstd.so.1
/usr/lib/x86_64-linux-gnu/libzstd.so.1.3.3
/usr/lib/x86_64-linux-gnu/libzvbi-chains.so.0
/usr/lib/x86_64-linux-gnu/libzvbi-chains.so.0.0.0
/usr/lib/x86_64-linux-gnu/libzvbi.so.0
/usr/lib/x86_64-linux-gnu/libzvbi.so.0.13.2

readelf -a to find functions

• crc32
• compress2
• uncompress
• compressBound

-------------------------------------------------------------------------------------
readelf -a /usr/lib/x86_64-linux-gnu/libz.a | grep crc32
File: /usr/lib/x86_64-linux-gnu/libz.a(crc32.o)
     2: 0000000000000000  1107 FUNC    LOCAL  DEFAULT    1 crc32_little
     4: 0000000000000460   505 FUNC    LOCAL  DEFAULT    1 crc32_combine_
    13: 0000000000000670    19 FUNC    GLOBAL DEFAULT    1 crc32_z
    14: 0000000000000690    19 FUNC    GLOBAL DEFAULT    1 crc32
    15: 00000000000006b0     5 FUNC    GLOBAL DEFAULT    1 crc32_combine
    16: 00000000000006c0     5 FUNC    GLOBAL DEFAULT    1 crc32_combine64
    22: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND crc32
    44: 0000000000000000     0 NOTYPE  GLOBAL DEFAULT  UND crc32

-------------------------------------------------------------------------------------
readelf -s /usr/lib/x86_64-linux-gnu/libz.a | grep compress2
     8: 0000000000000000   311 FUNC    GLOBAL DEFAULT    1 compress2
     8: 0000000000000000   447 FUNC    GLOBAL DEFAULT    1 uncompress2

-------------------------------------------------------------------------------------
readelf -s /usr/lib/x86_64-linux-gnu/libz.a | grep uncompress 
     8: 0000000000000000   447 FUNC    GLOBAL DEFAULT    1 uncompress2
    14: 00000000000001c0   445 FUNC    GLOBAL DEFAULT    1 uncompress

-------------------------------------------------------------------------------------
readelf -s /usr/lib/x86_64-linux-gnu/libz.a | grep compressBound
    15: 0000000000000280    30 FUNC    GLOBAL DEFAULT    1 compressBound

[dougpuob]

Move libz to the to the last of target_link_libraries() function.

if(WIN32)
    set(EXTERNAL_LIB Version)
elseif(UNIX AND NOT APPLE)
    set(EXTERNAL_LIB z tinfo)
elseif(APPLE)
    set(EXTERNAL_LIB z ncurses)
endif()

target_link_libraries(
    cppnamelint
    docopt
   ...
    ${EXTERNAL_LIB}   <-- **HERE** put this to the lowest
)