[llvm] 0a6c74e - [python] Bump Python minimum version to 3.8 (#78828)

[via llvm-commits]

Author: Craig Hesling
Date: 2024-02-19T21:16:45-08:00
New Revision: 0a6c74e21cc6750c843310ab35b47763cddaaf32

URL: https://github.com/llvm/llvm-project/commit/0a6c74e21cc6750c843310ab35b47763cddaaf32
DIFF: https://github.com/llvm/llvm-project/commit/0a6c74e21cc6750c843310ab35b47763cddaaf32.diff

LOG: [python] Bump Python minimum version to 3.8 (#78828)

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 to improve 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.

Added: 
    

Modified: 
    llvm/CMakeLists.txt
    llvm/docs/GettingStarted.rst
    llvm/docs/GettingStartedVS.rst
    llvm/docs/ReleaseNotes.rst
    llvm/docs/TestingGuide.rst

Removed: 
    


################################################################################
diff  --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 98cef005f07e09..6612f1364facd3 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -877,8 +877,8 @@ 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 687d1f29b5a1fe..a38fd2ae45f4d7 100644
--- a/llvm/docs/GettingStarted.rst
+++ b/llvm/docs/GettingStarted.rst
@@ -288,7 +288,7 @@ 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`
 =========================================================== ============ ==========================================
@@ -296,7 +296,8 @@ 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 Python libraries,
+      utilities, or bindings.
    #. 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 a1eb88dccc9e5c..4b15272635fbeb 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/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 5be00d9d5a5899..1125ed3b3cedbf 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -47,6 +47,11 @@ Non-comprehensive list of changes in this release
 Update on required toolchains to build LLVM
 -------------------------------------------
 
+* The minimum Python version has been raised from 3.6 to 3.8 across all of LLVM.
+  This enables the use of many new Python features, aligning more closely with
+  modern Python best practices, and improves CI maintainability
+  See `#78828 <https://github.com/llvm/llvm-project/pull/78828>`_ for more info.
+
 Changes to the LLVM IR
 ----------------------
 

diff  --git a/llvm/docs/TestingGuide.rst b/llvm/docs/TestingGuide.rst
index e32e4d1e535abb..3e3a722f141874 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