(C++) undefined reference to 'boost::thread::thread()'

Link error.

 

 

 

 

 

Full error message

 

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/MyFolder/main.o:: In function 'main': /MyFolder/main.cpp:5: error: undefined reference to 'boost::thread::thread()' /MyFolder/main.cpp:5: error: undefined reference to 'boost::thread::~thread()' :: error: collect2: ld returned 1 exit status

 

 

 

 

 

 

Cause

 

IDE: Qt Creator 1.2.0

Project type: Qt4 Console Application

Compiler: G++ 4.4.1

Libraries used:

• Boost: version 1.40

 

The following source code was used:

 

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#include <boost/thread.hpp> int main() {   boost::thread t; }

 

The following project file was used:

 

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#------------------------------------------------- # # Project created by QtCreator 2010-07-21T19:37:18 # #------------------------------------------------- QT += core QT -= gui TARGET = MyTarget CONFIG += console CONFIG -= app_bundle TEMPLATE = app SOURCES += main.cpp

 

 

 

 

 

Solution

 

You need to link against the boost::thread library. Add the following line to your project file:

 

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LIBS += -L/usr/local/lib -lboost_thread