Index: Misc/NEWS
===================================================================
--- Misc/NEWS	(révision 81326)
+++ Misc/NEWS	(copie de travail)
@@ -366,6 +366,10 @@
 Library
 -------
 
+- Issue #8663: distutils.log emulates backslashreplace error handler. Fix
+  compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
+  stdout is not a TTY).
+
 - Issue #8513: os.get_exec_path() supports b'PATH' key and bytes value.
   subprocess.Popen() and os._execvpe() support bytes program name. Add
   os.supports_bytes_environ flag: True if the native OS type of the environment
Index: Lib/distutils/tests/test_log.py
===================================================================
--- Lib/distutils/tests/test_log.py	(révision 0)
+++ Lib/distutils/tests/test_log.py	(révision 0)
@@ -0,0 +1,37 @@
+"""Tests for distutils.log"""
+
+import sys
+import unittest
+from tempfile import NamedTemporaryFile
+
+from distutils import log
+
+class TestLog(unittest.TestCase):
+    def test_non_ascii(self):
+        # Issue #8663: test that non-ASCII text is escaped with
+        # backslashreplace error handler (stream use ASCII encoding and strict
+        # error handler)
+        old_stdout = sys.stdout
+        old_stderr = sys.stderr
+        try:
+            log.set_threshold(log.DEBUG)
+            with NamedTemporaryFile(mode="w+", encoding='ascii') as stdout, \
+                 NamedTemporaryFile(mode="w+", encoding='ascii') as stderr:
+                sys.stdout = stdout
+                sys.stderr = stderr
+                log.debug("debug:\xe9")
+                log.fatal("fatal:\xe9")
+                stdout.seek(0)
+                self.assertEquals(stdout.read().rstrip(), "debug:\\xe9")
+                stderr.seek(0)
+                self.assertEquals(stderr.read().rstrip(), "fatal:\\xe9")
+        finally:
+            sys.stdout = old_stdout
+            sys.stderr = old_stderr
+
+def test_suite():
+    return unittest.makeSuite(TestLog)
+
+if __name__ == "__main__":
+    unittest.main(defaultTest="test_suite")
+
Index: Lib/distutils/log.py
===================================================================
--- Lib/distutils/log.py	(révision 81326)
+++ Lib/distutils/log.py	(copie de travail)
@@ -27,6 +27,10 @@
                 stream = sys.stderr
             else:
                 stream = sys.stdout
+            if stream.errors == 'strict':
+                # emulate backslashreplace error handler
+                encoding = stream.encoding
+                msg = msg.encode(encoding, "backslashreplace").decode(encoding)
             stream.write('%s\n' % msg)
             stream.flush()