Build issue on personal project

[dfeneyrou]

(moved inside Q&A topic)

[zoo868e]

Hi!
I got some error when install the Palanteer, can any one help me?
I'm using Ubuntu 20.04
I found that

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed

is the error occur by that?
Here is the output after I execute the cmake command.

$ cmake .. -DCMAKE_BUILD_TYPE=Release -DCUSTOM_FLAGS="lpthread"
-- The C compiler identification is GNU 9.3.0
-- The CXX compiler identification is GNU 9.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Build type: Release   (change with -DCMAKE_BUILD_TYPE=<Debug|Release|RelWithDebInfo|MinSizeRel|Asan>)
Custom configuration flags can be passed with -DCUSTOM_FLAGS="<flags>"
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE  
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so   
-- Found X11: /usr/include   
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so
-- Looking for XOpenDisplay in /usr/lib/x86_64-linux-gnu/libX11.so;/usr/lib/x86_64-linux-gnu/libXext.so - found
-- Looking for gethostbyname
-- Looking for gethostbyname - found
-- Looking for connect
-- Looking for connect - found
-- Looking for remove
-- Looking for remove - found
-- Looking for shmat
-- Looking for shmat - found
-- Looking for IceConnectionNumber in ICE
-- Looking for IceConnectionNumber in ICE - found
CMake Error at server/viewer/CMakeLists.txt:25 (message):
  XRender library has not been found

and here is the CMakeError.log

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /home/user/palanteer/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_fd714/fast && /usr/bin/make -f CMakeFiles/cmTC_fd714.dir/build.make CMakeFiles/cmTC_fd714.dir/build
make[1]: Entering directory '/home/user/palanteer/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_fd714.dir/src.c.o
/usr/bin/cc   -DCMAKE_HAVE_LIBC_PTHREAD   -o CMakeFiles/cmTC_fd714.dir/src.c.o   -c /home/user/palanteer/build/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_fd714
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_fd714.dir/link.txt --verbose=1
/usr/bin/cc  -DCMAKE_HAVE_LIBC_PTHREAD    CMakeFiles/cmTC_fd714.dir/src.c.o  -o cmTC_fd714 
/usr/bin/ld: CMakeFiles/cmTC_fd714.dir/src.c.o: in function `main':
src.c:(.text+0x46): undefined reference to `pthread_create'
/usr/bin/ld: src.c:(.text+0x52): undefined reference to `pthread_detach'
/usr/bin/ld: src.c:(.text+0x63): undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
make[1]: *** [CMakeFiles/cmTC_fd714.dir/build.make:87: cmTC_fd714] Error 1
make[1]: Leaving directory '/home/user/palanteer/build/CMakeFiles/CMakeTmp'
make: *** [Makefile:121: cmTC_fd714/fast] Error 2


Source file was:
#include <pthread.h>

void* test_func(void* data)
{
  return data;
}

int main(void)
{
  pthread_t thread;
  pthread_create(&thread, NULL, test_func, NULL);
  pthread_detach(thread);
  pthread_join(thread, NULL);
  pthread_atfork(NULL, NULL, NULL);
  pthread_exit(NULL);

  return 0;
}

[dfeneyrou]

Hi !

Do you have issue building the palanteer viewer or while building your own program (the one at the end of your comment)?

About the Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed, it is not a problem, it is just CMake's way to find the threading library. Just see the next lines, CMake found them:

-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE  

About the XRender library not found (for the Palanteer viewer), do you confirm that you have XOrg properly installed?

About your build command line for, I suppose, your own program, you shall not use -DCUSTOM_FLAGS="lpthread" to add pthread.

As an example, when building the Palanteer viewer, pthread is already included from the file server/viewer/CMakeLists.txt in the line target_link_libraries("palanteer" ${PALANTEER_LIBS} Threads::Threads libpalanteer) (the Threads::Threads part).

Can you confirm that your issue is with your own program (like the one at the end of your comment) and not when building the stock project as described in the root INSTALL.md file ?