Question

如下图所示。

我选择了用于编译c ++代码的通用架构。我现在想从终端做同样的事情。

我尝试使用这些选项 -arch x86_64，-arch i386，-m32，-m64

但我一直收到以下错误。

$ g++ -dynamiclib myclass.cc -I hashlib2plus/header/ -L hashlib2plus/lib/ -o myclass.so -v
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.3.0
Thread model: posix
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.11.0 -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name myclass.cc -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 253.9 -v -dwarf-column-info -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/7.0.2 -I hashlib2plus/header/ -stdlib=libc++ -fdeprecated-macro -fdebug-compilation-dir /Users/akshaythakare/temp/cpp_dll -ferror-limit 19 -fmessage-length 80 -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime=macosx-10.11.0 -fencode-extended-block-signature -fcxx-exceptions -fexceptions -fmax-type-align=16 -fdiagnostics-show-option -fcolor-diagnostics -o /var/folders/xs/1kz_zcnj1v324_rkdx_ftbx00000gn/T/myclass-13c695.o -x c++ myclass.cc
clang -cc1 version 7.0.2 based upon LLVM 3.7.0svn default target x86_64-apple-darwin15.3.0
ignoring nonexistent directory "/usr/include/c++/v1"
#include "..." search starts here:
#include <...> search starts here:
 hashlib2plus/header
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1
 /usr/local/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/7.0.2/include
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)
End of search list.
 "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -dynamic -dylib -arch x86_64 -macosx_version_min 10.11.0 -o myclass.so -Lhashlib2plus/lib/ /var/folders/xs/1kz_zcnj1v324_rkdx_ftbx00000gn/T/myclass-13c695.o -lc++ -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/7.0.2/lib/darwin/libclang_rt.osx.a
Undefined symbols for architecture x86_64:
  "sha512wrapper::sha512wrapper()", referenced from:
      MyClass::hashCheck() in myclass-13c695.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

是的，从Xcode运行时代码运行正常。

这是我的代码，以防有人知道如何解决错误

MyClass.h

#ifndef _MYCLASS_H_
#define _MYCLASS_H_

class MyClass{
public:
    MyClass();

    /* Use virtual otherwise linker will try to perform static linkage */
    virtual int hashCheck();
};

#endif

MyClass.cc

#include "myclass.h"
#include <dlfcn.h>
#include <iostream>
#include <dirent.h>
#include <vector>
#include "hashlib2plus/header/hashlibpp.h"

// g++ -dynamiclib -flat_namespace myclass.cc -o myclass.so
// hashlib2plus/hl_sha2ext.cpp hashlib2plus/hl_sha512wrapper.cpp

using namespace std;

void hasher(std::string);
std::vector <std::string> vecFile;

extern "C" MyClass* create_object(){
    return new MyClass;
}

extern "C" void destroy_object(MyClass* object){
    delete object;
}

MyClass::MyClass(){}

std::string globalMasterHash = "sd239d023md302k23s02ssd239d023md302k23s02ssd239d023md302k23s02ssd239d023md302k23s02s";

int MyClass::hashCheck(){
    std::string masterHash = "";
    hashwrapper *myWrapper = new sha512wrapper();
    std::string parentDir = "./static/";
    hasher(parentDir);

    while(vecFile.empty() != true){
        std::string hash2 = myWrapper->getHashFromFile(vecFile.back());
        vecFile.pop_back();
        masterHash = myWrapper->getHashFromString(hash2 + masterHash);
    }

    std::cout << masterHash << std::endl;
    if(masterHash.compare(globalMasterHash) == 0){
        return 1;
    } else {
        return 0;
    }
    return 0;
}


void hasher(std::string curr_directory){
    DIR *dir;
    dirent *ent;
    if((dir = opendir(curr_directory.c_str())) != NULL){
        while ((ent = readdir(dir))!=NULL){
            if(ent->d_name[0] != '.'){
                std::string path = curr_directory + ent->d_name;
                if (ent->d_type == DT_DIR){
                    path += "/";
                    hasher(path);
                } else {
                    vecFile.push_back(path);
                }
            }
        }
    }
    return;
}

我正在链接click here

的lib

Xcode用于通用构建的编译器选项有哪些？

0 个答案: