未定义的引用`icu_56 :: UnicodeString :: UnicodeString(signed char,unsigned short const*,int)'

Question

我正在运行ubuntu,我可以构建ICU

我包括:

#include <unistr.h>
using namespace icu;

这是我对ICU的构建方法:

CPPFLAGS="-DU_USING_ICU_NAMESPACE=0" 
CPPFLAGS="-DU_CHARSET_IS_UTF8=1"

export CFLAGS="-DU_CHARSET_IS_UTF8=1 -DU_GNUC_UTF16_STRING=1 -DU_STATIC_IMPLEMENTATION"
export CXXFLAGS="-DU_USING_ICU_NAMESPACE=0 -std=gnu++0x -DU_CHARSET_IS_UTF8=1 -DU_GNUC_UTF16_STRING=1 -DU_HAVE_CHAR16_T=1 -DUCHAR_TYPE=char16_t -Wall --std=c++0x -DU_STATIC_IMPLEMENTATION"
export CPPFLAGS="-DU_USING_ICU_NAMESPACE=0 -DU_CHARSET_IS_UTF8=1 -DU_STATIC_IMPLEMENTATION"
export LDFLAGS="-std=gnu++0x"

./runConfigureICU Linux --enable-static --disable-shared --disable-renaming

make check 
sudo make install

然后我链接到

/usr/local/lib/libicuuc.a

并尝试编译

icu::UnicodeString s1=UNICODE_STRING("such characters are safe 123 %-.", 32);

但得到错误

undefined reference to `icu_56::UnicodeString::UnicodeString(signed char, unsigned short const*, int)'

我在SO上找到了关于同样问题的另一篇文章,但是当我按照提供的步骤进行操作时,它不能解决我的问题,可能是一个不同的版本.

编辑:这是构建项目时IDE的输出

Cleaning Solution: myProject (Debug)

Cleaning: myProject (Debug)
Removing output files...
Clean complete

Building Solution: myProject (Debug)

Building: myProject (Debug)
Performing main compilation...

Precompiling headers

    Compiling source to object files
    g++  -MMD "/home/user/myProject/myProject/main.cpp" -g -O0 -std=c++11 -DDEBUG -I"/home/user/myProject/myProject/include" -I"/home/user/myProject/icu/unicode" -I"/home/user/myProject/myProject/.prec/Debug"  -c -o "/home/user/myProject/myProject/bin/Debug/main.o"

    Generating binary "myProject" from object files
    g++ -o "/home/user/myProject/myProject/bin/Debug/myProject" "/home/user/myProject/myProject/bin/Debug/main.o"
"/home/user/myProject/icu/libicuuc.a" 
    /home/user/myProject/myProject/bin/Debug/main.o: In function `icuTest':
    /home/user/myProject/myProject/icuTest.hpp:3: undefined reference to `icu_56::StringPiece::StringPiece(char const*)'
    /home/user/myProject/myProject/icuTest.hpp:3: undefined reference to `icu_56::UnicodeString::fromUTF8(icu_56::StringPiece const&)'
    /home/user/myProject/myProject/icuTest.hpp:3: undefined reference to `icu_56::UnicodeString::~UnicodeString()'
    /home/user/myProject/myProject/icuTest.hpp:3: undefined reference to `icu_56::UnicodeString::~UnicodeString()'
    collect2: error: ld returned 1 exit status
    Build complete -- 4 errors, 0 warnings

    ---------------------- Done ----------------------

    Build: 4 errors, 0 warnings

Answer 1

我注意到你的 g++ 行没有指向你所说的安装 icu 的 /usr/local/lib/libicuuc.a 。显然，它是根据标头进行编译的，但是静态库是否存在于您正在使用的路径中（“/home/user/myProject/icu/libicuuc.a”）？