-- The C compiler identification is GNU 7.2.1
-- The CXX compiler identification is GNU 4.8.5
It seems like you have different versions installed for the c and c++ compiler. You may need to install g++7 to use the same version for c and c++
I updated c++ and I can confirm that libpthread-stubs is installed. I'm using Ami Linux for this.

If you see this line:

Did not find GLFW3 in the system, using built-in GLFW3

It says that it can't find GLFW3, I can confirm that GLFW3 is installed without any error.

============= Checking for CMake ============
cmake version 3.11.0
CMake suite maintained and supported by Kitware (kitware.com/cmake).
Found CMake
============= Creating makefiles for Linux64-gcc-dynamic-Release ============
-- Configuring build for standalone Geogram (without Vorpaline)
-- GCC version >= 4.3, activating sign conversion warnings
-- GCC version >= 4.6, activating double promotion warnings
-- Did not find GLFW3 in the system, using built-in GLFW3.
CMake Error at /usr/local/share/cmake-3.11/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/local/share/cmake-3.11/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  /usr/local/share/cmake-3.11/Modules/FindThreads.cmake:205 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  src/lib/third_party/glfw/CMakeLists.txt:70 (find_package)
-- Configuring incomplete, errors occurred!
See also "/home/ec2-user/libraries/geogram/CMakeFiles/CMakeOutput.log".
See also "/home/ec2-user/libraries/geogram/CMakeFiles/CMakeError.log".
============= Creating makefiles for Linux64-gcc-dynamic-Debug ============
-- Configuring build for standalone Geogram (without Vorpaline)
-- GCC version >= 4.3, activating sign conversion warnings
-- GCC version >= 4.6, activating double promotion warnings
-- Did not find GLFW3 in the system, using built-in GLFW3.
CMake Error at /usr/local/share/cmake-3.11/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/local/share/cmake-3.11/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  /usr/local/share/cmake-3.11/Modules/FindThreads.cmake:205 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  src/lib/third_party/glfw/CMakeLists.txt:70 (find_package)
-- Configuring incomplete, errors occurred!
See also "/home/ec2-user/libraries/geogram/CMakeFiles/CMakeOutput.log".
See also "/home/ec2-user/libraries/geogram/CMakeFiles/CMakeError.log".
============== Geogram build configured ==================
To build geogram:
  - go to build/Linux64-gcc-dynamic-Release or build/Linux64-gcc-dynamic-Debug
  - run 'make' or 'cmake --build .'
Note: local configuration can be specified in CMakeOptions.txt
(see CMakeOptions.txt.sample for an example)
You'll need to re-run configure.sh if you create or modify CMakeOptions.txt
          
libpthread.so :
/var/lib/docker/overlay2/c2a718a936105a3f3adfbd51fe6121df428cb6216e088aa215153a92dfffd393/diff/usr/lib/x86_64-linux-gnu/libpthread.so
/var/lib/docker/overlay2/e49b8aebcd3e79a3b3655ae86303e4b5cc34257581d439263f6217ec8d07a4c2/merged/usr/lib/x86_64-linux-gnu/libpthread.so
/var/lib/docker/overlay2/c2734637d0a5954b594b92f02854a21eb50707a40da798997e8047130530e900/diff/usr/libx32/libpthread.so
/var/lib/docker/overlay2/c2734637d0a5954b594b92f02854a21eb50707a40da798997e8047130530e900/diff/usr/lib/x86_64-linux-gnu/libpthread.so
/var/lib/docker/overlay2/c2734637d0a5954b594b92f02854a21eb50707a40da798997e8047130530e900/diff/usr/lib32/libpthread.so
/usr/lib64/libpthread.so
pthread.h :
/var/lib/docker/overlay2/c2a718a936105a3f3adfbd51fe6121df428cb6216e088aa215153a92dfffd393/diff/usr/include/pthread.h
/var/lib/docker/overlay2/e49b8aebcd3e79a3b3655ae86303e4b5cc34257581d439263f6217ec8d07a4c2/merged/usr/include/pthread.h
/var/lib/docker/overlay2/c2734637d0a5954b594b92f02854a21eb50707a40da798997e8047130530e900/diff/usr/include/pthread.h
/usr/include/pthread.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/pthread.h
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      All reactions
          
I'm having this issue too. Edit: Solved it by including this in the top-level CMakeLists.txt:
set(CMAKE_THREAD_LIBS_INIT "-lpthread")

set(CMAKE_HAVE_THREADS_LIBRARY 1)

set(CMAKE_USE_WIN32_THREADS_INIT 0)

set(CMAKE_USE_PTHREADS_INIT 1)

set(THREADS_PREFER_PTHREAD_FLAG ON)
Found this suggestion in another forum somewhere.
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I'm having this issue too. Edit: Solved it by including this in the top-level CMakeLists.txt:
set(CMAKE_THREAD_LIBS_INIT "-lpthread")

set(CMAKE_HAVE_THREADS_LIBRARY 1)

set(CMAKE_USE_WIN32_THREADS_INIT 0)

set(CMAKE_USE_PTHREADS_INIT 1)

set(THREADS_PREFER_PTHREAD_FLAG ON)
Found this suggestion in another forum somewhere.
that is cool, fix for me. Thank you
I'm having this issue too. Edit: Solved it by including this in the top-level CMakeLists.txt:
set(CMAKE_THREAD_LIBS_INIT "-lpthread")

set(CMAKE_HAVE_THREADS_LIBRARY 1)

set(CMAKE_USE_WIN32_THREADS_INIT 0)

set(CMAKE_USE_PTHREADS_INIT 1)

set(THREADS_PREFER_PTHREAD_FLAG ON)
Found this suggestion in another forum somewhere.
Unfortunately this trick is not applicable to every environment. I do not build geogram, but I encountered the missing pthread functions during linking. It worked while building with CMake cross compilation an armhf target in Debian 10 and same sources fail in Arch Linux. So the trick is nice, but there are corner cases which fails. It seems that compilers or CMake have trouble with -pthreads flag. It seems that pthread shared objects are symlinked differently in every system, breaking builds. Unfortunatelly the only fix I managed to see working everywhere is linking straight to the SO file with absolute path. Something like this in CMake:
TARGET_LINK_LIBRARIES(my_target
#	${CMAKE_THREAD_LIBS_INIT} # FAILS
#	/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread.so # FAILS
	/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread-2.28.so # WORKS
#	/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread.so.0 # FAILS
Where libpthread-2.28.so is the SO and libpthread.so is symlink to libpthread.so.0 which in turns is symlink to libpthread-2.28.so:
/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread-2.28.so
/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread.so -> libpthread.so.0
/opt/cross-toolchains/arm-linux-gnueabihf/lib/libpthread.so.0 -> libpthread-2.28.so
          
@tkircher, I'm installing the librealsense package from source using HomeBrew and got the below error.
CMake Error at /opt/homebrew/Cellar/cmake/3.20.5/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):

Could NOT find Threads (missing: Threads_FOUND)

Call Stack (most recent call first):

/opt/homebrew/Cellar/cmake/3.20.5/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)

/opt/homebrew/Cellar/cmake/3.20.5/share/cmake/Modules/FindThreads.cmake:238 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)

examples/measure/CMakeLists.txt:9 (find_package)
I tried updating the config in the CMakeLists.txt like you mentioned above but see that there are multiple CMakeLists.txt files in the package hierarchy. Which file do I make the changes to?
Also, I installed using 'brew install --build-from-source librealsense' as I was getting the following error with 'brew install'
'Error: librealsense: no bottle available!'
Update: The issue is fixed