Question

当我在make之后运行可执行文件时，bash会引发以下错误：

$ ./prog 
-bash: ./prog: cannot execute binary file

我的makefile：

CC = g++ -std=c++11
LDFLAGS = -undefined dynamic_lookup -bundle
OBJ = main.o datetime.o logger.o WeatherApi.o tinyxml2.o tflower.o tservo.o


prog: $(OBJ)
    $(CC) -o $@ $(OBJ) $(LDFLAGS)

%.o: %.cpp
    $(CC) -c $<

clean:
    rm -r *.o

我错了什么？

更新2：

感谢您comment SergayA。在this article的帮助下链接python后，它可以工作。

更新1：

我在一些评论后删除了-undefined dynamic_lookup -bundle标志，所以我遇到了Python的问题。要使用Python.h，我将环境变量设置为此路径： CPLUS_INCLUDE_PATH=/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/

2 warnings generated.
g++ -std=c++11 -c datetime.cpp
g++ -std=c++11 -c logger.cpp
g++ -std=c++11 -c WeatherApi.cpp
g++ -std=c++11 -c tinyxml2.cpp
g++ -std=c++11 -c tflower.cpp
g++ -std=c++11 -c tservo.cpp
g++ -std=c++11 -o prog main.o datetime.o logger.o WeatherApi.o tinyxml2.o tflower.o tservo.o 
Undefined symbols for architecture x86_64:
  "_PyDict_GetItemString", referenced from:
      WeatherApi::SayHelloWorld() in WeatherApi.o
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyErr_Print", referenced from:
      WeatherApi::WeatherApi(char*, char*) in WeatherApi.o
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyImport_Import", referenced from:
      WeatherApi::WeatherApi(char*, char*) in WeatherApi.o
  "_PyModule_GetDict", referenced from:
      WeatherApi::WeatherApi(char*, char*) in WeatherApi.o
  "_PyObject_CallObject", referenced from:
      WeatherApi::SayHelloWorld() in WeatherApi.o
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyString_AsString", referenced from:
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyString_FromString", referenced from:
      WeatherApi::WeatherApi(char*, char*) in WeatherApi.o
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyTuple_New", referenced from:
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_PyTuple_SetItem", referenced from:
      WeatherApi::GetAirTemperature() in WeatherApi.o
  "_Py_Finalize", referenced from:
      WeatherApi::~WeatherApi() in WeatherApi.o
  "_Py_Initialize", referenced from:
      WeatherApi::WeatherApi(char*, char*) in WeatherApi.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: *** [prog] Error 1

Answer 1

我错了什么？

因为你显然想要一个可以直接执行的程序，所以你做错了就是将the -bundle option指定为g ++。这指示输出应该是Mach-o 包格式文件。这些文件不能直接执行。它们可以在运行时通过系统的动态链接功能加载到另一个程序中，这些功能可用于实现插件和类似的程序功能。删除此选项。

-undefined dynamic_lookup看起来也很可疑。我猜你是从那个其他Makefile中复制了那个和-bundle选项。如果你不知道那里有什么，你也应该放弃它。

Makefile编译二进制，而不是可执行文件

1 个答案: