message: enable nehalem (SSE 4.2) default processor
diff: @@ -34,14 +34,14 @@ option(ENOKI_ENABLE_AUTODIFF "Build Enoki automatic differentation library?" OFF
  option(ENOKI_ENABLE_PYTHON "Build Python extension library?" OFF)
  option(ENOKI_ENABLE_TESTS "Build Enoki test suite? (Warning, this takes *very* long to compile)" OFF)
  -# Compile for a sufficiently recent processor. Assumes Haswell+ (with AVX2) by
  +# Compile for a sufficiently recent processor. Assumes Nehalem+ (with SSE4.2) by
  # default. You may want to set MTS_NATIVE_FLAGS to "-march=native" to use all
  # instructions available on a particular machine.
  if (MSVC)
  - set(ENOKI_NATIVE_FLAGS_DEFAULT "/arch:AVX2")
  + set(ENOKI_NATIVE_FLAGS_DEFAULT "")
  else()
  - set(ENOKI_NATIVE_FLAGS_DEFAULT "-march=haswell")
  + set(ENOKI_NATIVE_FLAGS_DEFAULT "-march=nehalem")
  endif()
  # Adapt to variations in rpath handling on Linux and macOS
  