Update pybind11 to version 2.6.1

1 files changed, 393 insertions, 0 deletions

diff --git a/3rdparty/pybind11/tools/pybind11Common.cmake b/3rdparty/pybind11/tools/pybind11Common.cmake
new file mode 100644
index 00000000..3c05c682
--- /dev/null
+++ b/3rdparty/pybind11/tools/pybind11Common.cmake
@@ -0,0 +1,393 @@
+#[======================================================[.rst
+
+Adds the following targets::
+
+    pybind11::pybind11 - link to headers and pybind11
+    pybind11::module - Adds module links
+    pybind11::embed - Adds embed links
+    pybind11::lto - Link time optimizations (manual selection)
+    pybind11::thin_lto - Link time optimizations (manual selection)
+    pybind11::python_link_helper - Adds link to Python libraries
+    pybind11::python2_no_register - Avoid warning/error with Python 2 + C++14/7
+    pybind11::windows_extras - MSVC bigobj and mp for building multithreaded
+    pybind11::opt_size - avoid optimizations that increase code size
+
+Adds the following functions::
+
+    pybind11_strip(target) - strip target after building on linux/macOS
+    pybind11_find_import(module) - See if a module is installed.
+
+#]======================================================]
+
+# CMake 3.10 has an include_guard command, but we can't use that yet
+if(TARGET pybind11::lto)
+  return()
+endif()
+
+# If we are in subdirectory mode, all IMPORTED targets must be GLOBAL. If we
+# are in CONFIG mode, they should be "normal" targets instead.
+# In CMake 3.11+ you can promote a target to global after you create it,
+# which might be simpler than this check.
+get_property(
+  is_config
+  TARGET pybind11::headers
+  PROPERTY IMPORTED)
+if(NOT is_config)
+  set(optional_global GLOBAL)
+endif()
+
+# If not run in Python mode, we still would like this to at least
+# include pybind11's include directory:
+set(pybind11_INCLUDE_DIRS
+    "${pybind11_INCLUDE_DIR}"
+    CACHE INTERNAL "Include directory for pybind11 (Python not requested)")
+
+# --------------------- Shared targets ----------------------------
+
+# Build an interface library target:
+add_library(pybind11::pybind11 IMPORTED INTERFACE ${optional_global})
+set_property(
+  TARGET pybind11::pybind11
+  APPEND
+  PROPERTY INTERFACE_LINK_LIBRARIES pybind11::headers)
+
+# Build a module target:
+add_library(pybind11::module IMPORTED INTERFACE ${optional_global})
+set_property(
+  TARGET pybind11::module
+  APPEND
+  PROPERTY INTERFACE_LINK_LIBRARIES pybind11::pybind11)
+
+# Build an embed library target:
+add_library(pybind11::embed IMPORTED INTERFACE ${optional_global})
+set_property(
+  TARGET pybind11::embed
+  APPEND
+  PROPERTY INTERFACE_LINK_LIBRARIES pybind11::pybind11)
+
+# ----------------------- no register ----------------------
+
+# Workaround for Python 2.7 and C++17 (C++14 as a warning) incompatibility
+# This adds the flags -Wno-register and -Wno-deprecated-register if the compiler
+# is Clang 3.9+ or AppleClang and the compile language is CXX, or /wd5033 for MSVC (all languages,
+# since MSVC didn't recognize COMPILE_LANGUAGE until CMake 3.11+).
+
+add_library(pybind11::python2_no_register INTERFACE IMPORTED ${optional_global})
+set(clang_4plus
+    "$<AND:$<CXX_COMPILER_ID:Clang>,$<NOT:$<VERSION_LESS:$<CXX_COMPILER_VERSION>,3.9>>>")
+set(no_register "$<OR:${clang_4plus},$<CXX_COMPILER_ID:AppleClang>>")
+
+if(MSVC AND CMAKE_VERSION VERSION_LESS 3.11)
+  set(cxx_no_register "${no_register}")
+else()
+  set(cxx_no_register "$<AND:$<COMPILE_LANGUAGE:CXX>,${no_register}>")
+endif()
+
+set(msvc "$<CXX_COMPILER_ID:MSVC>")
+
+set_property(
+  TARGET pybind11::python2_no_register
+  PROPERTY INTERFACE_COMPILE_OPTIONS
+           "$<${cxx_no_register}:-Wno-register;-Wno-deprecated-register>" "$<${msvc}:/wd5033>")
+
+# --------------------------- link helper ---------------------------
+
+add_library(pybind11::python_link_helper IMPORTED INTERFACE ${optional_global})
+
+if(CMAKE_VERSION VERSION_LESS 3.13)
+  # In CMake 3.11+, you can set INTERFACE properties via the normal methods, and
+  # this would be simpler.
+  set_property(
+    TARGET pybind11::python_link_helper
+    APPEND
+    PROPERTY INTERFACE_LINK_LIBRARIES "$<$<PLATFORM_ID:Darwin>:-undefined dynamic_lookup>")
+else()
+  # link_options was added in 3.13+
+  # This is safer, because you are ensured the deduplication pass in CMake will not consider
+  # these separate and remove one but not the other.
+  set_property(
+    TARGET pybind11::python_link_helper
+    APPEND
+    PROPERTY INTERFACE_LINK_OPTIONS "$<$<PLATFORM_ID:Darwin>:LINKER:-undefined,dynamic_lookup>")
+endif()
+
+# ------------------------ Windows extras -------------------------
+
+add_library(pybind11::windows_extras IMPORTED INTERFACE ${optional_global})
+
+if(MSVC)
+  # /MP enables multithreaded builds (relevant when there are many files), /bigobj is
+  # needed for bigger binding projects due to the limit to 64k addressable sections
+  set_property(
+    TARGET pybind11::windows_extras
+    APPEND
+    PROPERTY INTERFACE_COMPILE_OPTIONS /bigobj)
+
+  if(CMAKE_VERSION VERSION_LESS 3.11)
+    set_property(
+      TARGET pybind11::windows_extras
+      APPEND
+      PROPERTY INTERFACE_COMPILE_OPTIONS $<$<NOT:$<CONFIG:Debug>>:/MP>)
+  else()
+    # Only set these options for C++ files.  This is important so that, for
+    # instance, projects that include other types of source files like CUDA
+    # .cu files don't get these options propagated to nvcc since that would
+    # cause the build to fail.
+    set_property(
+      TARGET pybind11::windows_extras
+      APPEND
+      PROPERTY INTERFACE_COMPILE_OPTIONS $<$<NOT:$<CONFIG:Debug>>:$<$<COMPILE_LANGUAGE:CXX>:/MP>>)
+  endif()
+endif()
+
+# ----------------------- Optimize binary size --------------------------
+
+add_library(pybind11::opt_size IMPORTED INTERFACE ${optional_global})
+
+if(MSVC)
+  set(PYBIND11_OPT_SIZE /Os)
+else()
+  set(PYBIND11_OPT_SIZE -Os)
+endif()
+
+set_property(
+  TARGET pybind11::opt_size
+  APPEND
+  PROPERTY INTERFACE_COMPILE_OPTIONS $<$<CONFIG:Release>:${PYBIND11_OPT_SIZE}>
+           $<$<CONFIG:MinSizeRel>:${PYBIND11_OPT_SIZE}>
+           $<$<CONFIG:RelWithDebInfo>:${PYBIND11_OPT_SIZE}>)
+
+# ----------------------- Legacy option --------------------------
+
+# Warn or error if old variable name used
+if(PYBIND11_CPP_STANDARD)
+  string(REGEX MATCH [[..$]] VAL "${PYBIND11_CPP_STANDARD}")
+  if(CMAKE_CXX_STANDARD)
+    if(NOT CMAKE_CXX_STANDARD STREQUAL VAL)
+      message(WARNING "CMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} does not match "
+                      "PYBIND11_CPP_STANDARD=${PYBIND11_CPP_STANDARD}, "
+                      "please remove PYBIND11_CPP_STANDARD from your cache")
+    endif()
+  else()
+    set(supported_standards 11 14 17 20)
+    if("${VAL}" IN_LIST supported_standards)
+      message(WARNING "USE -DCMAKE_CXX_STANDARD=${VAL} instead of PYBIND11_CPP_STANDARD")
+      set(CMAKE_CXX_STANDARD
+          ${VAL}
+          CACHE STRING "From PYBIND11_CPP_STANDARD")
+    else()
+      message(FATAL_ERROR "PYBIND11_CPP_STANDARD should be replaced with CMAKE_CXX_STANDARD "
+                          "(last two chars: ${VAL} not understood as a valid CXX std)")
+    endif()
+  endif()
+endif()
+
+# --------------------- Python specifics -------------------------
+
+# Check to see which Python mode we are in, new, old, or no python
+if(PYBIND11_NOPYTHON)
+  set(_pybind11_nopython ON)
+elseif(
+  PYBIND11_FINDPYTHON
+  OR Python_FOUND
+  OR Python2_FOUND
+  OR Python3_FOUND)
+  # New mode
+  include("${CMAKE_CURRENT_LIST_DIR}/pybind11NewTools.cmake")
+
+else()
+
+  # Classic mode
+  include("${CMAKE_CURRENT_LIST_DIR}/pybind11Tools.cmake")
+
+endif()
+
+# --------------------- pybind11_find_import -------------------------------
+
+if(NOT _pybind11_nopython)
+  # Check to see if modules are importable. Use REQUIRED to force an error if
+  # one of the modules is not found. <package_name>_FOUND will be set if the
+  # package was found (underscores replace dashes if present). QUIET will hide
+  # the found message, and VERSION will require a minimum version. A successful
+  # find will cache the result.
+  function(pybind11_find_import PYPI_NAME)
+    # CMake variables need underscores (PyPI doesn't care)
+    string(REPLACE "-" "_" NORM_PYPI_NAME "${PYPI_NAME}")
+
+    # Return if found previously
+    if(${NORM_PYPI_NAME}_FOUND)
+      return()
+    endif()
+
+    set(options "REQUIRED;QUIET")
+    set(oneValueArgs "VERSION")
+    cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "" ${ARGN})
+
+    if(ARG_REQUIRED)
+      set(status_level FATAL_ERROR)
+    else()
+      set(status_level WARNING)
+    endif()
+
+    execute_process(
+      COMMAND
+        ${${_Python}_EXECUTABLE} -c
+        "from pkg_resources import get_distribution; print(get_distribution('${PYPI_NAME}').version)"
+      RESULT_VARIABLE RESULT_PRESENT
+      OUTPUT_VARIABLE PKG_VERSION
+      ERROR_QUIET)
+
+    string(STRIP "${PKG_VERSION}" PKG_VERSION)
+
+    # If a result is present, this failed
+    if(RESULT_PRESENT)
+      set(${NORM_PYPI_NAME}_FOUND
+          ${NORM_PYPI_NAME}-NOTFOUND
+          CACHE INTERNAL "")
+      # Always warn or error
+      message(
+        ${status_level}
+        "Missing: ${PYPI_NAME} ${ARG_VERSION}\nTry: ${${_Python}_EXECUTABLE} -m pip install ${PYPI_NAME}"
+      )
+    else()
+      if(ARG_VERSION AND PKG_VERSION VERSION_LESS ARG_VERSION)
+        message(
+          ${status_level}
+          "Version incorrect: ${PYPI_NAME} ${PKG_VERSION} found, ${ARG_VERSION} required - try upgrading"
+        )
+      else()
+        set(${NORM_PYPI_NAME}_FOUND
+            YES
+            CACHE INTERNAL "")
+        set(${NORM_PYPI_NAME}_VERSION
+            ${PKG_VERSION}
+            CACHE INTERNAL "")
+      endif()
+      if(NOT ARG_QUIET)
+        message(STATUS "Found ${PYPI_NAME} ${PKG_VERSION}")
+      endif()
+    endif()
+    if(NOT ARG_VERSION OR (NOT PKG_VERSION VERSION_LESS ARG_VERSION))
+      # We have successfully found a good version, cache to avoid calling again.
+    endif()
+  endfunction()
+endif()
+
+# --------------------- LTO -------------------------------
+
+include(CheckCXXCompilerFlag)
+
+# Checks whether the given CXX/linker flags can compile and link a cxx file.
+# cxxflags and linkerflags are lists of flags to use.  The result variable is a
+# unique variable name for each set of flags: the compilation result will be
+# cached base on the result variable.  If the flags work, sets them in
+# cxxflags_out/linkerflags_out internal cache variables (in addition to
+# ${result}).
+function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out
+         linkerflags_out)
+  set(CMAKE_REQUIRED_LIBRARIES ${linkerflags})
+  check_cxx_compiler_flag("${cxxflags}" ${result})
+  if(${result})
+    set(${cxxflags_out}
+        "${cxxflags}"
+        PARENT_SCOPE)
+    set(${linkerflags_out}
+        "${linkerflags}"
+        PARENT_SCOPE)
+  endif()
+endfunction()
+
+function(_pybind11_generate_lto target prefer_thin_lto)
+  if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+    set(cxx_append "")
+    set(linker_append "")
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE)
+      # Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it
+      set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>")
+    elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+      set(cxx_append ";-fno-fat-lto-objects")
+    endif()
+
+    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND prefer_thin_lto)
+      _pybind11_return_if_cxx_and_linker_flags_work(
+        HAS_FLTO_THIN "-flto=thin${cxx_append}" "-flto=thin${linker_append}"
+        PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
+    endif()
+
+    if(NOT HAS_FLTO_THIN)
+      _pybind11_return_if_cxx_and_linker_flags_work(
+        HAS_FLTO "-flto${cxx_append}" "-flto${linker_append}" PYBIND11_LTO_CXX_FLAGS
+        PYBIND11_LTO_LINKER_FLAGS)
+    endif()
+  elseif(CMAKE_CXX_COMPILER_ID MATCHES "Intel")
+    # Intel equivalent to LTO is called IPO
+    _pybind11_return_if_cxx_and_linker_flags_work(HAS_INTEL_IPO "-ipo" "-ipo"
+                                                  PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
+  elseif(MSVC)
+    # cmake only interprets libraries as linker flags when they start with a - (otherwise it
+    # converts /LTCG to \LTCG as if it was a Windows path).  Luckily MSVC supports passing flags
+    # with - instead of /, even if it is a bit non-standard:
+    _pybind11_return_if_cxx_and_linker_flags_work(HAS_MSVC_GL_LTCG "/GL" "-LTCG"
+                                                  PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS)
+  endif()
+
+  # Enable LTO flags if found, except for Debug builds
+  if(PYBIND11_LTO_CXX_FLAGS)
+    # CONFIG takes multiple values in CMake 3.19+, until then we have to use OR
+    set(is_debug "$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>")
+    set(not_debug "$<NOT:${is_debug}>")
+    set(cxx_lang "$<COMPILE_LANGUAGE:CXX>")
+    if(MSVC AND CMAKE_VERSION VERSION_LESS 3.11)
+      set(genex "${not_debug}")
+    else()
+      set(genex "$<AND:${not_debug},${cxx_lang}>")
+    endif()
+    set_property(
+      TARGET ${target}
+      APPEND
+      PROPERTY INTERFACE_COMPILE_OPTIONS "$<${genex}:${PYBIND11_LTO_CXX_FLAGS}>")
+    if(CMAKE_PROJECT_NAME STREQUAL "pybind11")
+      message(STATUS "${target} enabled")
+    endif()
+  else()
+    if(CMAKE_PROJECT_NAME STREQUAL "pybind11")
+      message(STATUS "${target} disabled (not supported by the compiler and/or linker)")
+    endif()
+  endif()
+
+  if(PYBIND11_LTO_LINKER_FLAGS)
+    if(CMAKE_VERSION VERSION_LESS 3.11)
+      set_property(
+        TARGET ${target}
+        APPEND
+        PROPERTY INTERFACE_LINK_LIBRARIES "$<${not_debug}:${PYBIND11_LTO_LINKER_FLAGS}>")
+    else()
+      set_property(
+        TARGET ${target}
+        APPEND
+        PROPERTY INTERFACE_LINK_OPTIONS "$<${not_debug}:${PYBIND11_LTO_LINKER_FLAGS}>")
+    endif()
+  endif()
+endfunction()
+
+add_library(pybind11::lto IMPORTED INTERFACE ${optional_global})
+_pybind11_generate_lto(pybind11::lto FALSE)
+
+add_library(pybind11::thin_lto IMPORTED INTERFACE ${optional_global})
+_pybind11_generate_lto(pybind11::thin_lto TRUE)
+
+# ---------------------- pybind11_strip -----------------------------
+
+function(pybind11_strip target_name)
+  # Strip unnecessary sections of the binary on Linux/macOS
+  if(CMAKE_STRIP)
+    if(APPLE)
+      set(x_opt -x)
+    endif()
+
+    add_custom_command(
+      TARGET ${target_name}
+      POST_BUILD
+      COMMAND ${CMAKE_STRIP} ${x_opt} $<TARGET_FILE:${target_name}>)
+  endif()
+endfunction()