CheckSymbolExists.c:(.text+0x16): undefined reference to `pthread_create'

[SomeO]

Determining if the pthread_create exist failed with the following output:
Change Dir: /home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_35b4f/fast"
/usr/bin/make -f CMakeFiles/cmTC_35b4f.dir/build.make CMakeFiles/cmTC_35b4f.dir/build
make[1]: Entering directory '/mnt/raid3/home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_35b4f.dir/CheckSymbolExists.c.o
/usr/bin/cc -o CMakeFiles/cmTC_35b4f.dir/CheckSymbolExists.c.o -c /home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_35b4f
/usr/local/lib/python3.5/dist-packages/cmake/data/bin/cmake -E cmake_link_script CMakeFiles/cmTC_35b4f.dir/link.txt --verbose=1
/usr/bin/cc -rdynamic CMakeFiles/cmTC_35b4f.dir/CheckSymbolExists.c.o -o cmTC_35b4f
CMakeFiles/cmTC_35b4f.dir/CheckSymbolExists.c.o: In function main': CheckSymbolExists.c:(.text+0x16): undefined reference to pthread_create'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_35b4f.dir/build.make:86: recipe for target 'cmTC_35b4f' failed
make[1]: *** [cmTC_35b4f] Error 1
make[1]: Leaving directory '/mnt/raid3/home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp'
Makefile:121: recipe for target 'cmTC_35b4f/fast' failed
make: *** [cmTC_35b4f/fast] Error 2

File /home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <pthread.h>

int main(int argc, char** argv)
{
(void)argv;
#ifndef pthread_create
return ((int*)(&pthread_create))[argc];
#else
(void)argc;
return 0;
#endif
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_403cc/fast"
/usr/bin/make -f CMakeFiles/cmTC_403cc.dir/build.make CMakeFiles/cmTC_403cc.dir/build
make[1]: Entering directory '/mnt/raid3/home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_403cc.dir/CheckFunctionExists.c.o
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -o CMakeFiles/cmTC_403cc.dir/CheckFunctionExists.c.o -c /usr/local/lib/python3.5/dist-packages/cmake/data/share/cmake-3.12/Modules/Chec
kFunctionExists.c
Linking C executable cmTC_403cc
/usr/local/lib/python3.5/dist-packages/cmake/data/bin/cmake -E cmake_link_script CMakeFiles/cmTC_403cc.dir/link.txt --verbose=1
/usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create -rdynamic CMakeFiles/cmTC_403cc.dir/CheckFunctionExists.c.o -o cmTC_403cc -lpthreads
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_403cc.dir/build.make:86: recipe for target 'cmTC_403cc' failed
make[1]: *** [cmTC_403cc] Error 1
make[1]: Leaving directory '/mnt/raid3/home/lijie/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeTmp'
Makefile:121: recipe for target 'cmTC_403cc/fast' failed
make: *** [cmTC_403cc/fast] Error 2

@mzolfaghari when I run cmake .. ，I met this problem above，please help，thanks！

[arleyzhang]

I met the same mistake as you.

If you check the cmake output carefully, you will find there is an error:

CMake Error at docs/CMakeLists.txt:82 (file):
  file STRINGS file
  "/home/host/ECO-efficient-video-understanding/caffe_3d/.Doxyfile"
  cannot be read.

and when you check the ~/ECO-efficient-video-understanding/caffe_3d/build/CMakeFiles/CMakeError.log file, the content was the same as you wrote above.
Then you can copy a ".Doxyfile" file from caffe to "ECO-efficient-video-understanding/caffe_3d"
or
you can also modify the "CMakeList.txt" file:
line 24:
caffe_option(BUILD_docs "Build documentation" ON IF UNIX OR APPLE)
replace this line to:
caffe_option(BUILD_docs "Build documentation" OFF)

And then all errors will disappear and you can cmake and make.

[TwinkleYR]

models_ECO_Lite/kinetics/run.sh: 7: models_ECO_Lite/kinetics/run.sh: train: not found
when I use run.sh to realize the caffe_model on kinetics,I met this problem above. I think this error is related to the path,but the path is true, please help me thanks!