Subject: bug#38043: Acknowledgement (Incorrect Python byte-compiling for Python 3 and PyPy3)

From: Michał Górny <[email-masked]>
Date: Sun, 03 Nov 2019 12:34:26 +0100

I'm attaching a reference patch that fixes the issue for me.  However,
I'm sorry but I don't have the time to work on adding a test for it.

-- 
Best regards,
Michał Górny

From fc02398fbb5f1a5030a7205d22790b0288ec5a2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <[email-masked]>
Date: Sun, 3 Nov 2019 11:51:19 +0100
Subject: [PATCH] py-compile: Support -OO for py3.5+, and -O&-OO for pypy3

Add an additional compilation block to produce -OO optimized modules
for Python 3.5+.  Enable both -O and -OO for PyPy3.5+.  Remove
the second argument to imp.cache_from_source() in both -O and -OO blocks
as they do not seem necessary and break -OO byte-compilation.

Fixes automake bug #38043
---
 lib/py-compile | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/lib/py-compile b/lib/py-compile
index 1a3f4d644..44be97fc4 100755
--- a/lib/py-compile
+++ b/lib/py-compile
@@ -140,7 +140,7 @@ $PYTHON -O -c "
 import sys, os, py_compile, imp
 
 # pypy does not use .pyo optimization
-if hasattr(sys, 'pypy_translation_info'):
+if hasattr(sys, 'pypy_translation_info') and sys.hexversion < 0x03050000:
     sys.exit(0)
 
 files = '''$files'''
@@ -154,7 +154,30 @@ for file in files.split():
     sys.stdout.write(file)
     sys.stdout.flush()
     if hasattr(imp, 'get_tag'):
-        py_compile.compile(filepath, imp.cache_from_source(filepath, False), path)
+        py_compile.compile(filepath, imp.cache_from_source(filepath), path)
+    else:
+        py_compile.compile(filepath, filepath + 'o', path)
+sys.stdout.write('\n')" 2>/dev/null || :
+
+$PYTHON -OO -c "
+import sys, os, py_compile, imp
+
+# python<3.5 does not have split files for -O and -OO
+if sys.hexversion < 0x03050000:
+    sys.exit(0)
+
+files = '''$files'''
+sys.stdout.write('Byte-compiling python modules (-OO versions) ...\n')
+for file in files.split():
+    $pathtrans
+    $filetrans
+    if not os.path.exists(filepath) or not (len(filepath) >= 3
+                                            and filepath[-3:] == '.py'):
+	    continue
+    sys.stdout.write(file)
+    sys.stdout.flush()
+    if hasattr(imp, 'get_tag'):
+        py_compile.compile(filepath, imp.cache_from_source(filepath), path)
     else:
         py_compile.compile(filepath, filepath + 'o', path)
 sys.stdout.write('\n')" 2>/dev/null || :
-- 
2.23.0