diff -pruN 0.7.0-10/debian/changelog 0.7.0-10ubuntu1/debian/changelog
--- 0.7.0-10/debian/changelog	2023-01-29 12:01:36.000000000 +0000
+++ 0.7.0-10ubuntu1/debian/changelog	2023-01-30 08:29:31.000000000 +0000
@@ -1,9 +1,22 @@
+jpeg-xl (0.7.0-10ubuntu1) lunar; urgency=low
+
+  * Merge from Debian unstable. Remaining changes:
+    - Export O2 on ppc64el to fix a build failure
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Mon, 30 Jan 2023 09:29:31 +0100
+
 jpeg-xl (0.7.0-10) unstable; urgency=medium
 
   * d/patches: Improve cjxl/djxl manpages. Closes: #1023641
 
  -- Mathieu Malaterre <malat@debian.org>  Sun, 29 Jan 2023 13:01:36 +0100
 
+jpeg-xl (0.7.0-9ubuntu1) lunar; urgency=medium
+
+  * Export O2 on ppc64el to fix a build failure
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Wed, 18 Jan 2023 00:27:11 +0100
+
 jpeg-xl (0.7.0-9) unstable; urgency=medium
 
   * d/tests: Adapt test to latest change
diff -pruN 0.7.0-10/debian/rules 0.7.0-10ubuntu1/debian/rules
--- 0.7.0-10/debian/rules	2023-01-29 11:59:42.000000000 +0000
+++ 0.7.0-10ubuntu1/debian/rules	2023-01-29 15:21:11.000000000 +0000
@@ -23,6 +23,10 @@ ifneq (,$(filter $(DEB_HOST_ARCH), armhf
   DEB_CXXFLAGS_MAINT_APPEND += -fno-tree-vectorize
 endif
 
+ifeq (ppc64el, $(DEB_HOST_ARCH))
+  DEB_CXXFLAGS_MAINT_APPEND += -O2
+endif
+
 ifneq (,$(filter $(DEB_HOST_ARCH), arm64 armel armhf ppc64el))
   # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
   DEB_CXXFLAGS_MAINT_APPEND += -Wno-psabi