Question

我正在尝试使用C / C ++学习Core Foundation。我使用的是使用CMAKE的JetBrains CLion。

问题是 - 我不知道如何在Mac上的C / C ++ Makefile项目中包含适当的静态库。

我需要将静态库CFNetwork链接到我的项目以修复链接问题。

你可以给我一个快速提示吗？

我的情况：

#include <CFNetwork/CFNetwork.h>
#include <iostream>

int main() {
    CFStringRef bodyString = CFSTR(""); // Usually used for POST data
    CFDataRef bodyData = CFStringCreateExternalRepresentation(kCFAllocatorDefault,
        bodyString, kCFStringEncodingUTF8, 0);

    CFStringRef headerFieldName = CFSTR("X-My-Favorite-Field");
    CFStringRef headerFieldValue = CFSTR("Dreams");

    CFStringRef url = CFSTR("http://www.apple.com");
    CFURLRef myURL = CFURLCreateWithString(kCFAllocatorDefault, url, NULL);

    CFStringRef requestMethod = CFSTR("GET");
    CFHTTPMessageRef myRequest =
        CFHTTPMessageCreateRequest(kCFAllocatorDefault, requestMethod, myURL,
                kCFHTTPVersion1_1);

    CFHTTPMessageSetBody(myRequest, bodyData);
    CFHTTPMessageSetHeaderFieldValue(myRequest, headerFieldName, headerFieldValue);
    CFDataRef mySerializedRequest = CFHTTPMessageCopySerializedMessage(myRequest);

    return 0;
}

我可以编译它，但链接器输出以下内容：

"/Applications/CLion EAP.app/Contents/bin/cmake/bin/cmake" --build /Users/nickolay/Library/Caches/clion10/cmake/generated/3546f185/3546f185/Debug --target test001 -- -j 8
Scanning dependencies of target test001
[100%] Building CXX object CMakeFiles/test001.dir/main.cpp.o
Linking CXX executable test001
Undefined symbols for architecture x86_64:
  "_CFHTTPMessageCopySerializedMessage", referenced from:
      _main in main.cpp.o
  "_CFHTTPMessageCreateRequest", referenced from:
      _main in main.cpp.o
  "_CFHTTPMessageSetBody", referenced from:
      _main in main.cpp.o
  "_CFHTTPMessageSetHeaderFieldValue", referenced from:
      _main in main.cpp.o
  "_CFStringCreateExternalRepresentation", referenced from:
      _main in main.cpp.o
  "_CFURLCreateWithString", referenced from:
      _main in main.cpp.o
  "___CFConstantStringClassReference", referenced from:
      CFString in main.cpp.o
      CFString in main.cpp.o
      CFString in main.cpp.o
      CFString in main.cpp.o
      CFString in main.cpp.o
  "_kCFAllocatorDefault", referenced from:
      _main in main.cpp.o
  "_kCFHTTPVersion1_1", referenced from:
      _main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [test001] Error 1
make[2]: *** [CMakeFiles/test001.dir/all] Error 2
make[1]: *** [CMakeFiles/test001.dir/rule] Error 2
make: *** [test001] Error 2

Answer 1

终于解决了。

感谢此资源：http://raycast.net/clion-multiple-binaries

这就是我的CMAKE文件的样子和所有链接：

cmake_minimum_required(VERSION 2.8.4)
project(test001)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(SOURCE_FILES main.cpp)

find_library(corefoundation_lib CoreFoundation)
find_library(cfnetwork_lib CFNetwork)

set(frameworks
    ${cfnetwork_lib}
    ${corefoundation_lib})

add_executable(test001 ${SOURCE_FILES})
target_link_libraries(test001 ${frameworks})

Answer 2

我不是百分之百确定这是你的想法，但你通过给你的编译器链接C静态库，你的编译器库文件的名称是liblibrary.a。如果库不在某个默认库位置（idk是什么用于mac），则可以使用-L标志指定路径。

如何在MAC OS X上的CMAKE项目中包含C静态库

2 个答案: