FindPython*: New implementation for Python stuff

Fixes: #16142

1 files changed, 146 insertions, 0 deletions

diff --git a/Modules/FindPython2.cmake b/Modules/FindPython2.cmake
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+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindPython2
+-----------
+
+Find Python 2 interpreter, compiler and development environment (include
+directories and libraries).
+
+Three components are supported:
+
+* ``Interpreter``: search for Python 2 interpreter
+* ``Compiler``: search for Python 2 compiler. Only offered by IronPython.
+* ``Development``: search for development artifacts (include directories and
+  libraries)
+
+If no ``COMPONENTS`` is specified, ``Interpreter`` is assumed.
+
+To ensure consistent versions between components ``Interpreter``, ``Compiler``
+and ``Development``, specify all components at the same time::
+
+  find_package (Python2 COMPONENTS Interpreter Development)
+
+This module looks only for version 2 of Python. This module can be used
+concurrently with :module:`FindPython3` module to use both Python versions.
+
+The :module:`FindPython` module can be used if Python version does not matter
+for you.
+
+Imported Targets
+^^^^^^^^^^^^^^^^
+
+This module defines the following :ref:`Imported Targets <Imported Targets>`:
+
+``Python2::Interpreter``
+  Python 2 interpreter. Target defined if component ``Interpreter`` is found.
+``Python2::Compiler``
+  Python 2 compiler. Target defined if component ``Compiler`` is found.
+``Python2::Python``
+  Python 2 library. Target defined if component ``Development`` is found.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This module will set the following variables in your project
+(see :ref:`Standard Variable Names <CMake Developer Standard Variable Names>`):
+
+``Python2_FOUND``
+  System has the Python 2 requested components.
+``Python2_Interpreter_FOUND``
+  System has the Python 2 interpreter.
+``Python2_EXECUTABLE``
+  Path to the Python 2 interpreter.
+``Python2_INTERPRETER_ID``
+  A short string unique to the interpreter. Possible values include:
+    * Python
+    * ActivePython
+    * Anaconda
+    * Canopy
+    * IronPython
+``Python2_STDLIB``
+  Standard platform independent installation directory.
+
+  Information returned by
+  ``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=True)``.
+``Python2_STDARCH``
+  Standard platform dependent installation directory.
+
+  Information returned by
+  ``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=True)``.
+``Python2_SITELIB``
+  Third-party platform independent installation directory.
+
+  Information returned by
+  ``distutils.sysconfig.get_python_lib(plat_specific=False,standard_lib=False)``.
+``Python2_SITEARCH``
+  Third-party platform dependent installation directory.
+
+  Information returned by
+  ``distutils.sysconfig.get_python_lib(plat_specific=True,standard_lib=False)``.
+``Python2_Compiler_FOUND``
+  System has the Python 2 compiler.
+``Python2_COMPILER``
+  Path to the Python 2 compiler. Only offered by IronPython.
+``Python2_COMPILER_ID``
+  A short string unique to the compiler. Possible values include:
+    * IronPython
+``Python2_Development_FOUND``
+  System has the Python 2 development artifacts.
+``Python2_INCLUDE_DIRS``
+  The Python 2 include directories.
+``Python2_LIBRARIES``
+  The Python 2 libraries.
+``Python2_LIBRARY_DIRS``
+  The Python 2 library directories.
+``Python2_RUNTIME_LIBRARY_DIRS``
+  The Python 2 runtime library directories.
+``Python2_VERSION``
+  Python 2 version.
+``Python2_VERSION_MAJOR``
+  Python 2 major version.
+``Python2_VERSION_MINOR``
+  Python 2 minor version.
+``Python2_VERSION_PATCH``
+  Python 2 patch version.
+
+Hints
+^^^^^
+
+``Python2_ROOT_DIR``
+  Define the root directory of a Python 2 installation.
+
+``Python2_USE_STATIC_LIBS``
+  * If not defined, search for shared libraries and static libraries in that
+    order.
+  * If set to TRUE, search **only** for static libraries.
+  * If set to FALSE, search **only** for shared libraries.
+
+Commands
+^^^^^^^^
+
+This module defines the command ``Python2_add_library`` which have the same
+semantic as :command:`add_library` but take care of Python module naming rules
+(only applied if library is of type ``MODULE``) and add dependency to target
+``Python2::Python``::
+
+  Python2_add_library (my_module MODULE src1.cpp)
+
+If library type is not specified, ``MODULE`` is assumed.
+#]=======================================================================]
+
+
+set (_PYTHON_PREFIX Python2)
+
+set (_Python2_REQUIRED_VERSION_MAJOR 2)
+
+include (${CMAKE_CURRENT_LIST_DIR}/FindPython/Support.cmake)
+
+if (COMMAND __Python2_add_library)
+  macro (Python2_add_library)
+    __Python2_add_library (Python2 ${ARGV})
+  endmacro()
+endif()
+
+unset (_PYTHON_PREFIX)