c++ - 使用 MinGW 和 Netbeans 的 ICU 项目 - 未定义引用

Question

我配置了 MinGW 和 ICU-Project 源，如图所示 there .

我试图编译这段代码:

#include <cstdlib>
#include <stdio.h>
#include <iostream>
#include <timezone.h>
#include <inttypes.h>
#include <string>
#include <unistr.h>
using namespace std;
int main(int argc, char** argv) {
    UnicodeString id;
    TimeZone* tz =  TimeZone::createTimeZone(id);   
    int32_t raw,dst;
    int64_t when = 1367836520*U_MILLIS_PER_SECOND;
    UErrorCode ec = U_ZERO_ERROR;
    tz->getOffset((UDate)when,FALSE,raw,dst,ec);
    cout<<raw<<endl;
    cout<<dst<<endl;   
}

我得到以下编译器错误:

"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/c/Users/Florian/Documents/NetBeansProjects/CppApplication_1'
"/usr/bin/make"  -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/cppapplication_1.exe
make[2]: Entering directory `/c/Users/Florian/Documents/NetBeansProjects/CppApplication_1'
mkdir -p build/Debug/MinGW-Windows
rm -f build/Debug/MinGW-Windows/main.o.d
g++    -c -g -I../../../../../MinGW/msys/1.0/local/include/unicode -I../../../../../MinGW/msys/1.0/local/include -MMD -MP -MF build/Debug/MinGW-Windows/main.o.d -o build/Debug/MinGW-Windows/main.o main.cpp
main.cpp: In Funktion �int main(int, char**)�:
main.cpp:27:31: Warnung: Ganzzahl�berlauf in Ausdruck [-Woverflow]
mkdir -p dist/Debug/MinGW-Windows
g++     -o dist/Debug/MinGW-Windows/cppapplication_1 build/Debug/MinGW-Windows/main.o 
build/Debug/MinGW-Windows/main.o: In function `main':
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/main.cpp:24: undefined reference to `icu_51::TimeZone::createTimeZone(icu_51::UnicodeString const&)'
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/main.cpp:31: undefined reference to `icu_51::UnicodeString::~UnicodeString()'
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/main.cpp:31: undefined reference to `icu_51::UnicodeString::~UnicodeString()'
build/Debug/MinGW-Windows/main.o: In function `ZN6icu_517UObjectC2Ev':
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/../../../../../MinGW/msys/1.0/local/include/unicode/uobject.h:221: undefined reference to `vtable for icu_51::UObject'
build/Debug/MinGW-Windows/main.o: In function `ZN6icu_5111ReplaceableC2Ev':
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/../../../../../MinGW/msys/1.0/local/include/unicode/rep.h:240: undefined reference to `vtable for icu_51::Replaceable'
build/Debug/MinGW-Windows/main.o: In function `ZN6icu_5113UnicodeStringC1Ev':
C:\Users\Florian\Documents\NetBeansProjects\CppApplication_1/../../../../../MinGW/msys/1.0/local/include/unicode/unistr.h:3615: undefined reference to `vtable for icu_51::UnicodeString'
collect2.exe: Fehler: ld gab 1 als Ende-Status zur�ck
make[2]: *** [dist/Debug/MinGW-Windows/cppapplication_1.exe] Error 1
make[2]: Leaving directory `/c/Users/Florian/Documents/NetBeansProjects/CppApplication_1'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/c/Users/Florian/Documents/NetBeansProjects/CppApplication_1'
make: *** [.build-impl] Error 2

知道这些错误是什么意思吗？

main.cpp:31: undefined reference to `icu_51::UnicodeString::~UnicodeString()'

这些错误出现在我想从 ICU 项目中使用的头文件中，这是怎么回事？

Answer 1

我遇到了同样的问题。

main.cpp:31: undefined reference to `icu_51::UnicodeString::~UnicodeString()'

上面的错误意味着链接器无法找到 UnicodeString 析构函数的定义。

您必须在项目中链接相应的库:icuin(由于对 icu_51::TimeZone::createTimeZone 的 undefined reference )、icuuc(由于对 icu_51::的 undefined reference ) UnicodeString::~UnicodeString()).

我还必须链接 icudt。

在您的 path/to/icu/lib 目录中查找正确的库名称。例如，对于静态 icu，它们是:sicuuc、sicuin、sicust 等。