[llvm] [python] Bump Python minimum version to 3.8 (PR #78828)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-testing-tools

Author: Craig Hesling (linux4life798)

<details>
<summary>Changes</summary>

As per the RFC https://discourse.llvm.org/t/rfc-upgrading-llvms-minimum-required-python-version/67571,
raise the minimum Python version to ensure that the Python syntax doesn't
become overly obsolete, to enable new Python feature usage, and ensure the
maintainability of CI.

One of the primary use cases for this higher Python version is to enable python type
annotations that are more aligned with current Python best practices. This is not only
important for our own internal Python for testing, but for the Python bindings that
are exposed to users.

---
Full diff: https://github.com/llvm/llvm-project/pull/78828.diff


4 Files Affected:

- (modified) llvm/CMakeLists.txt (+2-2) 
- (modified) llvm/docs/GettingStarted.rst (+3-2) 
- (modified) llvm/docs/GettingStartedVS.rst (+1-1) 
- (modified) llvm/docs/TestingGuide.rst (+1-1) 


``````````diff
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 1d230004e6c34ec..c7c21971039eec7 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -880,8 +880,8 @@ set(LLVM_PROFDATA_FILE "" CACHE FILEPATH
   "Profiling data file to use when compiling in order to improve runtime performance.")
 
 if(LLVM_INCLUDE_TESTS)
-  # Lit test suite requires at least python 3.6
-  set(LLVM_MINIMUM_PYTHON_VERSION 3.6)
+  # All LLVM Python files should be compatible down to this minimum version.
+  set(LLVM_MINIMUM_PYTHON_VERSION 3.8)
 else()
   # FIXME: it is unknown if this is the actual minimum bound
   set(LLVM_MINIMUM_PYTHON_VERSION 3.0)
diff --git a/llvm/docs/GettingStarted.rst b/llvm/docs/GettingStarted.rst
index da9cc8aea6d32d8..87ae956e3351a0c 100644
--- a/llvm/docs/GettingStarted.rst
+++ b/llvm/docs/GettingStarted.rst
@@ -286,7 +286,7 @@ uses the package and provides other details.
 Package                                                     Version      Notes
 =========================================================== ============ ==========================================
 `CMake <http://cmake.org/>`__                               >=3.20.0     Makefile/workspace generator
-`python <http://www.python.org/>`_                          >=3.6        Automated test suite\ :sup:`1`
+`python <http://www.python.org/>`_                          >=3.8        Automated test suite\ :sup:`1`
 `zlib <http://zlib.net>`_                                   >=1.2.3.4    Compression library\ :sup:`2`
 `GNU Make <http://savannah.gnu.org/projects/make>`_         3.79, 3.79.1 Makefile/build processor\ :sup:`3`
 =========================================================== ============ ==========================================
@@ -294,7 +294,8 @@ Package                                                     Version      Notes
 .. note::
 
    #. Only needed if you want to run the automated test suite in the
-      ``llvm/test`` directory.
+      ``llvm/test`` directory, or if you plan to utilize any auxiliary Python
+      libraries or utilities.
    #. Optional, adds compression / uncompression capabilities to selected LLVM
       tools.
    #. Optional, you can use any other build tool supported by CMake.
diff --git a/llvm/docs/GettingStartedVS.rst b/llvm/docs/GettingStartedVS.rst
index a1eb88dccc9e5c7..4b15272635fbeb9 100644
--- a/llvm/docs/GettingStartedVS.rst
+++ b/llvm/docs/GettingStartedVS.rst
@@ -55,7 +55,7 @@ Visual Studio 2019 so separate installation is not required. If you do install
 CMake separately, Visual Studio 2022 will require CMake Version 3.21 or later.
 
 If you would like to run the LLVM tests you will need `Python
-<http://www.python.org/>`_. Version 3.6 and newer are known to work. You can
+<http://www.python.org/>`_. Version 3.8 and newer are known to work. You can
 install Python with Visual Studio 2019, from the Microsoft store or from
 the `Python web site <http://www.python.org/>`_. We recommend the latter since it
 allows you to adjust installation options.
diff --git a/llvm/docs/TestingGuide.rst b/llvm/docs/TestingGuide.rst
index a692e301fa2c41f..98e6bd31b668791 100644
--- a/llvm/docs/TestingGuide.rst
+++ b/llvm/docs/TestingGuide.rst
@@ -23,7 +23,7 @@ Requirements
 ============
 
 In order to use the LLVM testing infrastructure, you will need all of the
-software required to build LLVM, as well as `Python <http://python.org>`_ 3.6 or
+software required to build LLVM, as well as `Python <http://python.org>`_ 3.8 or
 later.
 
 LLVM Testing Infrastructure Organization

``````````

</details>


https://github.com/llvm/llvm-project/pull/78828