[C/C++] how to intall libpthread library?

[josephellengar]

Hi. I wrote a program using pthreads in c++/Ubuntu, but when I try to compile it the linker is complaining about undefined references to pthread_create. What package do I need to have installed to use this, and also where would I find the library to link it up to compile in codeblocks?

Thank you!

[Bachstelze]

Most probably wrong flag ordering. Post your command with the exact error.

[Zugzwang]

I would say that the common cause for this error is forgetting to link against pthread.

Here is what a quick google search found for me: http://gabrielshen.blogspot.de/2008/06/how-to-run-pthread-in-codeblocks.html

[josephellengar]

Never mind, I had put the -lpthread command in the wrong place. I had it in compiler options instead of linker options. d'oh. By the way, love your username, Zugzwang. Thanks!

[tal111]

I follow this instructions
Adding -pthread to eclipse, for using posix threads

http://blog.asteriosk.gr/2009/02/15/adding-pthread-to-eclipse-for-using-posix-threads/
and I am still getting this error :gcc-pthread: not found

make all
Building target: robot2.exe
Invoking: GCC C Linker
gcc`pkg-config --cflags --libs gtk+-2.0 opencv libglade-2.0 glib-2.0 gthread-2.0 `-L/usr/lib/x86_64-linux-gnu/pkgconfig -o "robot2.exe" ./src/test_listener/TestListenerThread.o ./src/sensor_thread/SensorThread.o ./src/main/main.o ./src/image_thread/ImageThead.o ./src/gui/gui.o ./src/event_thread/EventThread.o ./src/common/Msg.o -lpthread
/bin/sh: gcc-pthread: not found
make: *** [robot2.exe] Error 127

[tal111]

to add at the linker command -Wl,-no-as-needed before the pkg-config solve the problem :
${COMMAND} -Wl,-no-as-needed ` pkg-config --cflags --libs gtk+-2.0 opencv libglade-2.0 ` ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}