[Python-checkins] bpo-44935: enable posix_spawn() on Solaris (GH-27795)

[gpshead]

https://github.com/python/cpython/commit/b1930bf75f276cd7ca08c4455298128d89adf7d1
commit: b1930bf75f276cd7ca08c4455298128d89adf7d1
branch: main
author: Jakub Kulík <Kulikjak at gmail.com>
committer: gpshead <greg at krypto.org>
date: 2021-08-17T11:09:48-07:00
summary:

bpo-44935: enable posix_spawn() on Solaris (GH-27795)

Enable posix_spawn() on Solaris

files:
A Misc/NEWS.d/next/Library/2021-08-17-16-01-44.bpo-44935.roUl0G.rst
M Lib/subprocess.py

diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index 7a9ab5a4ed0ec..dd1174ee59ad3 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -660,8 +660,9 @@ def _use_posix_spawn():
         # os.posix_spawn() is not available
         return False
 
-    if sys.platform == 'darwin':
-        # posix_spawn() is a syscall on macOS and properly reports errors
+    if sys.platform in ('darwin', 'sunos5'):
+        # posix_spawn() is a syscall on both macOS and Solaris,
+        # and properly reports errors
         return True
 
     # Check libc name and runtime libc version
diff --git a/Misc/NEWS.d/next/Library/2021-08-17-16-01-44.bpo-44935.roUl0G.rst b/Misc/NEWS.d/next/Library/2021-08-17-16-01-44.bpo-44935.roUl0G.rst
new file mode 100644
index 0000000000000..3d41c3be1403d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-08-17-16-01-44.bpo-44935.roUl0G.rst
@@ -0,0 +1,2 @@
+:mod:`subprocess` on Solaris now also uses :func:`os.posix_spawn()` for
+better performance.