Undefined reference to `RestClient::get(std::string const&)' about restclient-cpp HOT 22 CLOSED

@kiyology
iirc you want to do

-L /usr/local/lib -lrestclient-cpp

from restclient-cpp.

Sorry, I still get this error. And I have tried all methods mentioned above.

I install this lib by download deb file in https://packagecloud.io/mrtazz/restclient-cpp, and use sudo dpkg -i xxx.deb to install.

After install, i found header files in /usr/include, and so file in /usr/lib/. Then I run sudo ldconfig.
my code:

#include "restclient-cpp/restclient.h"
#include <iostream>
#include <string>

int main() {
    std::string url = "http://baidu.com";
    RestClient::Response r = RestClient::get(url);

    std::cout << r.code << "\n";
    return 0;
}

I run g++ -I /usr/include/ -L /usr/lib/ -lrestclient-cpp -lcurl test_restclient.cc to compile.
Then I get error message:

/tmp/ccCejkeS.o: In function `main':
test_restclient.cc:(.text+0x66): undefined reference to `RestClient::get(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

I have no idea how to fix it. It make me so sad.

from restclient-cpp.

Anyone can help me for the following problema please
build/Debug/Cygwin-Windows/main.o: In function MinHeap<std::string>::insert(int, std::string)': /cygdrive/c/Users/nibrass/Documents/NetBeansProjects/P3_Ex1/MinHeap.h:85: undefined reference to NodeMinHeapstd::string::NodeMinHeap(NodeMinHeapstd::string const&)'
when i click on the error , it takes me to my class MinHeap in a method insert where i creat a node type of NodeMinHeap i don't know where i am getting wrong, please help me .

from restclient-cpp.

this looks like a duplicate of #55, closing this in favor of the existing issue. If it's not the same one, please reopen.

from restclient-cpp.

On closer inspection this is most likely not the same issue. Can you provide your platform and environment details and the output log of the failed compilation please?

from restclient-cpp.

i have the same problem. i used on raspberry pi

from restclient-cpp.

Did you install it into the default location as root? Have you run /sbin/ldconfig after installation?

from restclient-cpp.

I am facing a similar issue with this lib. I've got this error:

main.cpp:(.text+0x64): undefined reference to `RestClient::get(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&)'

I have used this link to setup the lib:

https://packagecloud.io/mrtazz/restclient-cpp/packages/ubuntu/trusty/restclient-cpp_0.4.4-1_amd64.deb

G++ and Ubuntu version:
g++ (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0 20160609

from restclient-cpp.

@gosantos can you provide the test program that throws this error on compilation?

from restclient-cpp.

@mrtazz I recompiled the lib from source and now I've got the same error:

main.cpp:(.text+0x45): undefined reference to `RestClient::get(std::string const&)'

My code is very simple:

#include "restclient-cpp/restclient.h"

int main(){

  RestClient::Response r = RestClient::get("http://ip.jsontest.com/?callback=showMyIP");

  return 0;
}

from restclient-cpp.

@gosantos thanks! can you also provide the command with which you compiled the test program?

For reference, this is how it's linked on CI where the build works

from restclient-cpp.

@mrtazz yes, ofc. I am using g++ main.cpp -o main
Btw I have ran the command /sbin/ldconfig and it didn't work as well;

from restclient-cpp.

You have to tell it to link the shared library in as well. Something like g++ main.cpp -o main -I /path/to/restclient-cpp-headers -L /path/to/restclient-cpp-so/ -l librestclient -lcurl

from restclient-cpp.

closing this issue. Please reopen if the problem persists.

from restclient-cpp.

@mrtazz I'm having this issue too. i used -L /usr/local/include/restclient-cpp/ /usr/local/lib/librestclient-cpp.so /usr/lib/x86_64-linux-gnu/libcurl.a and I'm getting
c++: warning: /usr/local/lib/librestclient-cpp.so: linker input file unused because linking not done c++: warning: /usr/lib/x86_64-linux-gnu/libcurl.a: linker input file unused because linking not done [100%] Linking CXX executable testing CMakeFiles/testing/testing.o: In function main':
/home/xxxxxx/testing.cpp:1088: undefined reference to RestClient::get(std::string const&)' collect2: error: ld returned 1 exit status
Any idea how to solve this? Been debugging all day long. Thanks!

from restclient-cpp.

@mrtazz Got it working now. Previously failed because of my cmake configuration. Thanks!

from restclient-cpp.

Hi @mrtazz, I have been facing with compiling the simple code. I am getting

some.cpp:(.text+0x57): undefined reference to `RestClient::get(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&)'
collect2: error: ld returned 1 exit status

To compile the code I am using : g++ -L /usr/local/lib -lrestclient-cpp -lcurl some.cpp

Also my code looks like :
#include "restclient-cpp/restclient.h"

using namespace std;

int main() {
RestClient::Response r = RestClient::get("http://localhost:8080/get_logs/1/2");
return 0;
}

========================
For installation , I have used

git clone https://github.com/mrtazz/restclient-cpp.git
cd restclient-cpp
./autogen.sh
./configure
make install

Kindly let me know what I did wrong ? Any help would be good ! :)

from restclient-cpp.

do you have the headers in your include path like -I /usr/local/include?

from restclient-cpp.

undefined reference to RestClient::get(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

Tried installing your lib via every method I found, still doesn't work.

Header files included, include path told to the compiler; -L /usr/local/lib/ and -lrestclient-cpp passed to linker, all files ARE in that directory.

ldconfig -p shows that ld sees the library, and ar with objdump show that such symbols are in the file...

Even tried moving the files between usr/lb and usr/local/lib, renaming them with or without the - symbol...
I've been working on it all day, idk what else to do.

Here's what is passed to the compiler:
g++ tests/tests_all.cpp -std=c++1z -pthread -Iinclude/ -Ilibs/ -L /usr/local/lib/ -L../build -o tests/tests_all -lrestclient-cpp -lcurl -lgtest build/libao3.a

from restclient-cpp.

Well, sorry for the mess, figured out I should never forget there's no evil magic when working with code.
The problem was on my side, and quite common, I must say, and it was about linking order.

I use GNU Make, and my makefile has the following line:
TEST_LIBRARIES=$(LIBRARIES) $(OUT) -lgtest, where $(OUT) was the static library I made with make build and $(LIBRARIES) == -lrestclient-cpp

I got confused and for some reason didn't realize that not only the executable, but also the library in $(OUT) depended on the restclient lib. Well, I realized, but didn't pay much attention to it. So, it was all about linking order, №0 solution on StackExchange. 🤦‍♂️

My bad, sorry again.
Your library is awesome 🏆 👍

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@rakhack Thanks! Glad you found a fix :)

from restclient-cpp.

g++ main.cpp -o main -I /home/raak/restclient-cpp/include/ -L /usr/local/lib/librestclient-cpp.so -lcurl -L /usr/local/lib -lrestclient-cpp

works for me

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