CODEWITHSUNDEEP
c++gccg++
Nikita Zakoryuchkin
Nikita Zakoryuchkin

Reputation: 41

/usr/bin/ld: cannot find during linking g++

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!

Upvotes: 0

Views: 6918

Answers (3)

Venkatesh Kaduru
Venkatesh Kaduru

Reputation: 11

in my case, the problem was solved when I change the Cmake version to 2.9

Upvotes: 0

Wong Michael
Wong Michael

Reputation: 11

Try this:

g++ -std=c++11 -I./ -I./contrib -L./build/clickhouse/ -lclickhouse-cpp-lib-static -o demo demo.cpp ./build/clickhouse/libclickhouse-cpp-lib-static.a ./build/contrib/lz4/liblz4-lib.a ./build/contrib/cityhash/libcityhash-lib.a ./build/contrib/absl/libabsl-lib.a

Upvotes: -1

Sam Varshavchik
Sam Varshavchik

Reputation: 118292

ld's manual page describes the -l option as follows (irrelevant details omitted):

-l namespec

--library=namespec

Add the archive or object file specified by namespec to the list of files to link. [...] ld will search a directory for a library called libnamespec.so

If you read this very carefully, you will reach the conclusion that -llibclickhouse-cpp-lib instructs ld to search for a library named liblibclickhouse-cpp-lib.so which, obviously, does not exist.

This should simply be -lclickhouse-cpp-lib.

Upvotes: 2

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