对_unwind_resume和__gxx_personality_v0的未定义引用 [英] Undefined reference to _unwind_resume and __gxx_personality_v0
问题描述
我试图使用JsonCpp库。我在Windows上使用MinGW和CodeBlocks。
I'm trying to use the JsonCpp library. I'm on Windows, using MinGW and CodeBlocks.
当我包含任何从json头，我的链接器implodes，并给出了这两个错误。我开始环顾四周，发现这两个问题基本上描述了我的问题：
When I include anything from the json headers, my linker implodes and gives out this two errors. I've started to look around and I found these two other questions which basically describe my problem:
有关g ++的问题和未定义的引用__gxx_personality_v0
如果我将两个缺少的变量声明为void指针，
And if I declare the two missing variables as void pointers, like below, the problem goes away:
void * __gxx_personality_v0=0;
void * _Unwind_Resume =0;
但是，我不明白为什么会发生此错误。 CodeBlocks被设置为使用migw32-g ++为cpp文件，并且还添加-lstdc ++选项不能解决这个问题。也没有选项-fno-exception（我想要的异常，介意你，我只是试图）。
However, I don't understand why this error happens. CodeBlocks is set up so that it uses migw32-g++ for cpp files, and also adding the -lstdc++ option does not fix the problem. Neither does the option -fno-exception ( I want exceptions, mind you, I was just trying ).
我也包括一个boost库在同一个文件，不会造成任何问题。
I'm also including a boost library in the same file and that does not cause any problems.
编辑：
错误输出正是我在标题中说的：在链接期间，我总共获得了22个未定义的_Unwind_Resume和__gxx_personality_v0引用。我的代码是：
The error output is exactly what I said in my title: I get a total of 22 undefined references to _Unwind_Resume and __gxx_personality_v0 during the linking. My code is:
#include <boost/algorithm/string.hpp>
#include <include/json/value.h>
//void * __gxx_personality_v0=0;
//void * _Unwind_Resume =0;
int main () {
std::string str1("Hello world!");
boost::to_upper(str1);
Json::Value k;
return 0;
}
错误是只有当我包含/使用JsonCPP库。取消注释已注释的行可以解决问题。
The error is there only when I include/use the JsonCPP library. Uncommenting the commented lines fixes the problem.
命令行输出为：
mingw32-g++.exe -Wall -fexceptions -g -DSFML_DYNAMIC -IC:\Users\Svalorzen\Documents\Projects\boost_1_49 -IC:\Users\Svalorzen\Documents\Projects\jsoncpp-src-0.5.0 -IC:\Users\Svalorzen\Documents\Projects\SFML-1.6\include -IC:\Users\Svalorzen\Documents\Projects\hge181\include -c C:\Users\Svalorzen\Documents\Projects\test\main.cpp -o obj\Debug\main.o
mingw32-g++.exe -LC:\Users\Svalorzen\Documents\Projects\jsoncpp-src-0.5.0 -LC:\Users\Svalorzen\Documents\Projects\SFML-1.6\lib -LC:\Users\Svalorzen\Documents\Projects\hge181\lib -o bin\Debug\test.exe obj\Debug\main.o -fno-exceptions -lsfml-graphics -lsfml-window -lsfml-system C:\Users\Svalorzen\Documents\Projects\jsoncpp-src-0.5.0\libs\mingw\libjson_mingw_libmt.a C:\Users\Svalorzen\Documents\Projects\hge181\lib\gcc\libhge.a C:\Users\Svalorzen\Documents\Projects\hge181\lib\gcc\libhelp.a
Output size is 1.22 MB
Process terminated with status 0 (0 minutes, 3 seconds)
0 errors, 0 warnings
$ b b
第二个编辑：
我添加了用于编译库的命令行：
SECOND I'm adding the command lines I use to compile the library:
g++ -o buildscons\mingw\src\lib_json\json_reader.o -c -DWIN32 -DNDEBUG -D_MT -Iinclude src\lib_json\json_reader.cpp
g++ -o buildscons\mingw\src\lib_json\json_value.o -c -DWIN32 -DNDEBUG -D_MT -Iinclude src\lib_json\json_value.cpp
g++ -o buildscons\mingw\src\lib_json\json_writer.o -c -DWIN32 -DNDEBUG -D_MT -Iinclude src\lib_json\json_writer.cpp
ar rc buildscons\mingw\src\lib_json\libjson_mingw_libmt.a buildscons\mingw\src\lib_json\json_reader.o buildscons\mingw\src\lib_json\json_value.o buildscons\mingw\src\lib_json\json_writer.o
ranlib buildscons\mingw\src\lib_json\libjson_mingw_libmt.a
推荐答案
Code ::阻止JsonCpp的源代码并自己创建库。我仍然很困惑，虽然为什么用Scons创建的库没有工作，因为它使用与Code :: Blocks使用相同的编译器，但同时它不是（或错误不会在那里）。
I finally fixed this by importing into Code::Blocks the source code of JsonCpp and creating the library myself. I am still baffled though as to why the library created with Scons didn't work, since it was using the same compiler that Code::Blocks uses, but at the same time it was not ( or the error wouldn't have been there ).
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