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I'm trying to use static library in iOS application. It seems that i've done everything correctly but i'm getting multiple "Undefined symbols for architecture i386" errors (SO question). I've decided to check where necessary methods are implemented (static libraries that contains method code):

#!/bin/bash
for filename in /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/lib*.a; do
    echo "  $filename:"
    nm "$filename" | grep getMemBufferCopy
done

it was found in few files:

MBA-Anton:StaticLibraryUsage2 asmirnov$ ./find_method 
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64AsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64AsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64CodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64Desc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64Disassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64Info.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAArch64Utils.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMAsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMDisassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMARMInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAnalysis.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMAsmPrinter.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMBitReader.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMBitWriter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMCore.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMCppBackendCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMCppBackendInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMDebugInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMExecutionEngine.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMHexagonAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMHexagonCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMHexagonDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMHexagonInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMIRReader.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMInstCombine.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMInstrumentation.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMInterpreter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMJIT.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMLTO.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMLinker.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMC.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMCDisassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMCJIT.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMCParser.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMSP430AsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMSP430CodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMSP430Desc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMSP430Info.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsAsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsDisassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMMipsInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMNVPTXAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMNVPTXCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMNVPTXDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMNVPTXInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMObjCARCOpts.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMObject.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMOption.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMPowerPCAsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMPowerPCAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMPowerPCCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMPowerPCDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMPowerPCInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMR600AsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMR600CodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMR600Desc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMR600Info.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMRuntimeDyld.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMScalarOpts.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSelectionDAG.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSparcCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSparcDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSparcInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSupport.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
000000b0 T __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZAsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZDisassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMSystemZInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMTableGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMTarget.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMTransformUtils.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMVectorize.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86AsmParser.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86AsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86CodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86Desc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86Disassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86Info.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMX86Utils.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMXCoreAsmPrinter.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMXCoreCodeGen.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMXCoreDesc.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMXCoreDisassembler.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMXCoreInfo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMipa.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLLVMipo.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libLTO.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangARCMigrate.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangAST.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangASTMatchers.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangAnalysis.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangBasic.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangCodeGen.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangDriver.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangDynamicASTMatchers.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangEdit.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangFormat.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangFrontend.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangFrontendTool.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangIndex.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangLex.a:
         U __ZN4llvm12MemoryBuffer16getMemBufferCopyENS_9StringRefES1_
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangParse.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangRewriteCore.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangRewriteFrontend.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangSema.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangSerialization.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangStaticAnalyzerCheckers.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangStaticAnalyzerCore.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangStaticAnalyzerFrontend.a:
  /Users/asmirnov/Documents/dev/src/llvm_34_ios_i386_installed_/lib/libclangTooling.a:

So it seems it found usage but not implementation. How can i do it correctly (find .a file with method impl)?

Community
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4ntoine
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1 Answers1

0

When I type

nm --help

I get:

Usage: nm [option(s)] [file(s)]
 List symbols in [file(s)] (a.out by default).
 The options are:
  -a, --debug-syms       Display debugger-only symbols
  -A, --print-file-name  Print name of the input file before every symbol
  -B                     Same as --format=bsd
  -C, --demangle[=STYLE] Decode low-level symbol names into user-level names
                          The STYLE, if specified, can be `auto' (the default),
                          `gnu', `lucid', `arm', `hp', `edg', `gnu-v3', `java'
                          or `gnat'
      --no-demangle      Do not demangle low-level symbol names
  -D, --dynamic          Display dynamic symbols instead of normal symbols
      --defined-only     Display only defined symbols
  -e                     (ignored)
  -f, --format=FORMAT    Use the output format FORMAT.  FORMAT can be `bsd',
                           `sysv' or `posix'.  The default is `bsd'
  -g, --extern-only      Display only external symbols
  -l, --line-numbers     Use debugging information to find a filename and
                           line number for each symbol
  -n, --numeric-sort     Sort symbols numerically by address
  -o                     Same as -A
  -p, --no-sort          Do not sort the symbols
  -P, --portability      Same as --format=posix
  -r, --reverse-sort     Reverse the sense of the sort
      --plugin NAME      Load the specified plugin
  -S, --print-size       Print size of defined symbols
  -s, --print-armap      Include index for symbols from archive members
      --size-sort        Sort symbols by size
      --special-syms     Include special symbols in the output
      --synthetic        Display synthetic symbols as well
  -t, --radix=RADIX      Use RADIX for printing symbol values
      --target=BFDNAME   Specify the target object format as BFDNAME
  -u, --undefined-only   Display only undefined symbols
  -X 32_64               (ignored)
  @FILE                  Read options from FILE
  -h, --help             Display this information
  -V, --version          Display this program's version number

nm: supported targets: elf64-x86-64 elf32-i386 elf32-x86-64 a.out-i386-linux pei-i386 pei-x86-64 elf64-l1om elf64-k1om elf64-little elf64-big elf32-little elf32-big plugin srec symbolsrec verilog tekhex binary ihex
Report bugs to .

This is on a Linux desktop machine.

R Sahu
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  • MBA-Anton:StaticLibraryUsage2 asmirnov$ nm --help error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: invalid argument -- Usage: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm [-agnopruUmxjlfAP[s segname sectname] [-] [-t format] [[-arch ] ...] [file ...] – 4ntoine Jun 05 '14 at 05:59
  • @4ntoine, Wish I could help you more but I don't think I can. – R Sahu Jun 05 '14 at 06:02