gcc -pthread -shared -Wl,-rpath-link,/sage/local/lib -L/sage/local/lib -Wl,-rpath,/sage/local/lib -L. -Wl,-rpath-link,/sage/local/lib -L/sage/local/lib -Wl,-rpath,/sage/local/lib -shared -Wl,-rpath-link,/sage/local/lib -L/sage/local/lib -Wl,-rpath,/sage/local/lib build/temp.linux-x86_64-3.9/scipy/cluster/_optimal_leaf_ordering.o -L/sage/local/lib -Lbuild/temp.linux-x86_64-3.9 -o build/lib.linux-x86_64-3.9/scipy/cluster/_optimal_leaf_ordering.cpython-39-x86_64-linux-gnu.so -Wl,--version-script=build/temp.linux-x86_64-3.9/link-version-scipy.cluster._optimal_leaf_ordering.map
  C compiler: g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC

  creating /tmp/tmpif5aglmi/tmp
  creating /tmp/tmpif5aglmi/tmp/tmpif5aglmi
  compile options: '-I/sage/local/include/python3.9 -c'
  extra options: '-std=c++14'
  g++: /tmp/tmpif5aglmi/main.cpp
  g++: error: unrecognized command line option '-std=c++14'
  C compiler: g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC

  creating /tmp/tmpjrgp9vmy/tmp
  creating /tmp/tmpjrgp9vmy/tmp/tmpjrgp9vmy
  compile options: '-I/sage/local/include/python3.9 -c'
  extra options: '-std=c++11'
  g++: /tmp/tmpjrgp9vmy/main.cpp
  C compiler: g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC

  creating /tmp/tmpik_q_vbd/tmp
  creating /tmp/tmpik_q_vbd/tmp/tmpik_q_vbd
  compile options: '-I/sage/local/include/python3.9 -c'
  g++: /tmp/tmpik_q_vbd/main.c
  C compiler: g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC

  creating /tmp/tmpv4ojh26z/tmp
  creating /tmp/tmpv4ojh26z/tmp/tmpv4ojh26z
  compile options: '-I/sage/local/include/python3.9 -c'
  extra options: '-pthread'
  g++: /tmp/tmpv4ojh26z/main.c
  C compiler: g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC

   creating build/temp.linux-x86_64-3.9/scipy/fft
  creating build/temp.linux-x86_64-3.9/scipy/fft/_pocketfft
  compile options: '-DPOCKETFFT_PTHREADS -I/sage/local/lib/python3.9/site-packages/pybind11/include -I/sage/local/lib/python3.9/site-packages/pybind11/include -I/sage/local/lib/python3.9/site-packages/numpy/core/include -Ibuild/src.linux-x86_64-3.9/numpy/distutils/include -I/sage/local/include/python3.9 -c'
  extra options: '-std=c++11 -pthread -fvisibility=hidden -msse -msse2 -msse3'
  g++: scipy/fft/_pocketfft/pypocketfft.cxx
  In file included from scipy/fft/_pocketfft/pypocketfft.cxx:16:0:
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:328:5: error: 'is_trivially_copyable' is not a member of 'std'
       std::is_trivially_copyable<T>,
       ^
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:328:5: error: 'is_trivially_copyable' is not a member of 'std'
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:328:33: error: template argument 2 is invalid
       std::is_trivially_copyable<T>,
                                   ^
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:968:49: error: 'is_pod_struct' is not a member of 'pybind11::detail'
   struct format_descriptor<T, detail::enable_if_t<detail::is_pod_struct<T>::value>> {
                                                   ^
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:968:49: error: 'is_pod_struct' is not a member of 'pybind11::detail'
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:968:72: error: template argument 1 is invalid
   struct format_descriptor<T, detail::enable_if_t<detail::is_pod_struct<T>::value>> {
                                                                          ^
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:968:75: error: template argument 2 is invalid
   struct format_descriptor<T, detail::enable_if_t<detail::is_pod_struct<T>::value>> {
                                                                             ^
  /sage/local/lib/python3.9/site-packages/pybind11/include/pybind11/numpy.h:968:80: error: expected unqualified-id before '>' token
   struct format_descriptor<T, detail::enable_if_t<detail::is_pod_struct<T>::value>> {


error: Command "g++ -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused -O2 -g -fPIC -DPOCKETFFT_PTHREADS -I/sage/local/lib/python3.9/site-packages/pybind11/include -I/sage/local/lib/python3.9/site-packages/pybind11/include -I/sage/local/lib/python3.9/site-packages/numpy/core/include -Ibuild/src.linux-x86_64-3.9/numpy/distutils/include -I/sage/local/include/python3.9 -c scipy/fft/_pocketfft/pypocketfft.cxx -o build/temp.linux-x86_64-3.9/scipy/fft/_pocketfft/pypocketfft.o -MMD -MF build/temp.linux-x86_64-3.9/scipy/fft/_pocketfft/pypocketfft.o.d -std=c++11 -pthread -fvisibility=hidden -msse -msse2 -msse3" failed with exit status 1