[Qemu-devel] [PATCH] Deprecate Python 2 support

[Eduardo Habkost <ehabkost@redhat.com>]

Python 2 will reach end of life in January 1 2020.  Declare it as
deprecated.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 configure            | 8 ++++++++
 qemu-deprecated.texi | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/configure b/configure
index 5b183c2e39..50385061ed 100755
--- a/configure
+++ b/configure
@@ -6461,6 +6461,14 @@ if test "$supported_os" = "no"; then
     echo "us upstream at qemu-devel@nongnu.org."
 fi
 
+# Note that if the Python conditional here evaluates True we will exit
+# with status 1 which is a shell 'false' value.
+if ! $python -c 'import sys; sys.exit(sys.version_info < (3,0))'; then
+  echo
+  echo "WARNING: Python 2 support is deprecated" >&2
+  echo "WARNING: Python 3 will be required for building future versions of QEMU" >&2
+fi
+
 config_host_mak="config-host.mak"
 
 echo "# Automatically generated by configure - do not modify" >config-all-disas.mak
diff --git a/qemu-deprecated.texi b/qemu-deprecated.texi
index 842e71b11d..2f2d9a3e95 100644
--- a/qemu-deprecated.texi
+++ b/qemu-deprecated.texi
@@ -206,3 +206,11 @@ Note that if you are exposing the export via /dev/nbd0, it is easier
 to just export the entire image and then mount only /dev/nbd0p1 than
 it is to reinvoke @command{qemu-nbd -c /dev/nbd0} limited to just a
 subset of the image.
+
+@section Build system
+
+@subsection Python 2 support (since 4.1.0)
+
+In the future, QEMU will require Python 3 to be available at
+build time.  Support for Python 2 in scripts shipped with QEMU
+is deprecated.
-- 
2.18.0.rc1.1.g3f1ff2140