Question

我正在运行ubuntu，我可以构建ICU

我已经包括：

#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上发现了另一篇关于同样问题的帖子，但是当我按照提供的步骤操作时，它不能解决我的问题，可能是另一个版本。

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/usr/local/lib/libicuuc.a，你说你安装了icu。它显然正在编译标题OK，但静态库是否存在于您正在使用的路径中（＆＃34; /home/user/myProject/icu/libicuuc.a"）？

Answer 2

当你跑步时：

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

你注意到警告了吗？：

*** WARNING: You must set the following flags before code compiled against this ICU will function properly:

    -DU_DISABLE_RENAMING=1

The recommended way to do this is to prepend the following lines to source/common/unicode/uconfig.h or #include them near the top of that file.

 /* -DU_DISABLE_RENAMING=1 */
#define U_DISABLE_RENAMING 1

如果没有，那么现在就这样做。

接下来，在其他任何事情之前将测试程序修改为#include <unicode/uconfig.h>， e.g。

<强>的main.cpp

#include <unicode/uconfig.h>
#include <unicode/platform.h>
#include <unicode/unistr.h>

int main()
{
    icu::UnicodeString s1=UNICODE_STRING("such characters are safe 123 %-.", 32);
    (void)s1;
    return 0;
}

它将编译并链接到libicuuc.a。

如果您希望确保像unicode/uconfig.h这样的样板标题，您可以并且之前编译器自动包含unicode/platform.h 通过使用预包含标题来做任何其他事情，例如

<强> icu_preinc.h

// pre-include header for icu
#include <unicode/uconfig.h>
#include <unicode/platform.h>

您传递给GCC或使用以下选项进行铿锵：

-include /path/to/icu_preinc.h

如果您使用基于CPPFLAGS的构建系统，则可以在make中添加此选项。

对于上面的玩具程序，只需在命令行上定义U_DISABLE_RENAMING=1即可，而不包括<unicode/uconfig.h>

g++ -DU_DISABLE_RENAMING=1 -o prog main.cpp -L/your/libicuuc/search/path -licuuc

Answer 3

我认为问题出在g ++语法中：

  searchListing(event) {
    event.persist();
    console.log(event.target.value);
  }

您要使用目标文件main.o和目标文件libicuuc.a构建myProject。但是，后者不是目标文件，而是静态库。我认为你应该将g ++行修改为：

g++ -o "/home/user/myProject/myProject/bin/Debug/myProject" "/home/user/myProject/myProject/bin/Debug/main.o" "/home/user/myProject/icu/libicuuc.a"

g++ /home/user/myProject/myProject/bin/Debug/main.o -L/home/user/myProject/icu/ -licuuc -o /home/user/myProject/myProject/bin/Debug/myProject告诉链接器在/ home / user / myProject / icu /文件夹中查找库，-L/home/user/myProject/icu/告诉它链接名为libicuuc.a或libicuuc.so的库

Answer 4

注意：对于ICU 67，应为using namespace icu_67。

未定义的引用`icu_56 :: UnicodeString :: UnicodeString（signed char，unsigned short const *，int）＆＃39;

4 个答案: