/usr/bin/ld: 在链接 g++ 期间找不到
这个问题已经出现过很多次了。但我没有找到答案。
我有这个 .cpp 文件
#include <clickhouse/client.h>
#include <iostream>
using namespace clickhouse;
int main(){
/// Initialize client connection.
Client client(ClientOptions().SetHost("localhost"));
client.Select("SELECT l.a, l.b from table", [] (const Block& block)
{
for (size_t i = 0; i < block.GetRowCount(); ++i) {
std::cout << block[0]->As<ColumnUInt64>()->At(i) << " "
<< block[1]->As<ColumnString>()->At(i) << "\n";
}
}
);
return 0;
}
，并且我已经实例化了 SO 库，就像写的 这里。 之后，我得到了 /usr/local/lib 目录 的以下结构：
~/$ ls /usr/local/lib
>>libclickhouse-cpp-lib-static.a libclickhouse-cpp-lib.so
在下一步中，我尝试使用 g++ 执行编译，
~/$ g++ run.cpp -std=c++17 -o result -llibclickhouse-cpp-lib -L/usr/local/lib
>>/usr/bin/ld: cannot find -llibclickhouse-cpp-lib
>>collect2: error: ld returned 1 exit status
我不知道是什么阻碍了创建链接。
感谢您的帮助！
This question has already been here so many times. But I didn't find the answer.
I have this .cpp file
#include <clickhouse/client.h>
#include <iostream>
using namespace clickhouse;
int main(){
/// Initialize client connection.
Client client(ClientOptions().SetHost("localhost"));
client.Select("SELECT l.a, l.b from table", [] (const Block& block)
{
for (size_t i = 0; i < block.GetRowCount(); ++i) {
std::cout << block[0]->As<ColumnUInt64>()->At(i) << " "
<< block[1]->As<ColumnString>()->At(i) << "\n";
}
}
);
return 0;
}
and I have instantiated SO library, like written here.
after that i got the following structure of /usr/local/lib directory:
~/$ ls /usr/local/lib
>>libclickhouse-cpp-lib-static.a libclickhouse-cpp-lib.so
in next step I trying execute compilation with g++
~/$ g++ run.cpp -std=c++17 -o result -llibclickhouse-cpp-lib -L/usr/local/lib
>>/usr/bin/ld: cannot find -llibclickhouse-cpp-lib
>>collect2: error: ld returned 1 exit status
I don't know what hinders create links.
thank You for Your help!
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ld的手册页对-l选项的描述如下（省略无关细节）：如果您仔细阅读本文，您将得出这样的结论：
-llibclickhouse-cpp-lib指示ld搜索名为liblibclickhouse-cpp 的库-lib.so显然不存在。这应该只是
-lclickhouse-cpp-lib。ld's manual page describes the-loption as follows (irrelevant details omitted):If you read this very carefully, you will reach the conclusion that
-llibclickhouse-cpp-libinstructsldto search for a library namedliblibclickhouse-cpp-lib.sowhich, obviously, does not exist.This should simply be
-lclickhouse-cpp-lib.就我而言，当我将 Cmake 版本更改为 2.9 时，问题得到解决
in my case, the problem was solved when I change the Cmake version to 2.9
试试这个：
Try this: