make fails on indiccd.cpp using GCC 7.1.1 on Fedora 26 about indi HOT 10 CLOSED

I am almost afraid to report this ... Using a fresh copy from GitHub and the following command line issued from the libindi subdirectory, cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local . I get the following command line fragment, -- Performing Test COMPATIBLE_FORTIFY_SOURCE -- Performing Test COMPATIBLE_FORTIFY_SOURCE - Success -- Looking for pthread.h -- Looking for pthread.h - not found CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:137 (message): Could NOT find Threads (missing: Threads_FOUND) Call Stack (most recent call first): /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:377 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake/Modules/FindThreads.cmake:212 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:220 (find_package) From the CMakeError.log I see the following fragment, cc1: error: unrecognized command line option ‘-Wno-unused-command-line-argument’ [-Werror] cc1: all warnings being treated as errors Looks like another troublesome warning. HOWEVER... Using a fresh copy from GitHub and the following command line issued from the libindi subdirectory, cmake -DCMAKE_INSTALL_PREFIX=/usr/local . Both cmake and make work as expected. BUT ... Trying to build the drivers from the 3party subdirectory using the following command line, cmake -DCMAKE_INSTALL_PREFIX=/usr/local . I get the following command line fragment, -- Performing Test ERROR_NAME_COMPILE -- Performing Test ERROR_NAME_COMPILE - Failed -- - 1.0.8 or older -- Looking for pthread.h -- Looking for pthread.h - not found CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:137 (message): Could NOT find Threads (missing: Threads_FOUND) Call Stack (most recent call first): /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:377 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake/Modules/FindThreads.cmake:212 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) indi-sx/CMakeLists.txt:21 (find_package) From the CMakeError.log file I see the following fragment, usr/include/features.h:373:4: error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp] # warning _FORTIFY_SOURCE requires compiling with optimization (-O) ^~~~~~~ cc1plus: all warnings being treated as errors

Thank you. It works. I'm deeply grateful for all of your assistance. This turned into a far bigger hassle for all of you than I could have guessed. Have a blessed day. :-)