diff -Nru libzstd-1.5.5+dfsg/debian/changelog libzstd-1.5.5+dfsg/debian/changelog
--- libzstd-1.5.5+dfsg/debian/changelog	2023-05-21 19:03:50.000000000 +0000
+++ libzstd-1.5.5+dfsg/debian/changelog	2023-05-21 20:19:46.000000000 +0000
@@ -1,3 +1,9 @@
+libzstd (1.5.5+dfsg-0ubuntu1~22.04.sav1) jammy; urgency=medium
+
+  * d/rules: Disable LTO due causing FTBFS ("-Werror=maybe-uninitialized")
+
+ -- Rob Savoury <savoury@savos.tech>  Sun, 21 May 2023 13:19:46 -0700
+
 libzstd (1.5.5+dfsg-0ubuntu1~22.04.sav0) jammy; urgency=medium
 
   * Backport to Jammy
diff -Nru libzstd-1.5.5+dfsg/debian/libzstd1.symbols libzstd-1.5.5+dfsg/debian/libzstd1.symbols
--- libzstd-1.5.5+dfsg/debian/libzstd1.symbols	2023-05-21 19:03:50.000000000 +0000
+++ libzstd-1.5.5+dfsg/debian/libzstd1.symbols	2023-05-21 20:19:46.000000000 +0000
@@ -12,8 +12,6 @@
  ZDICT_trainFromBuffer_cover@Base 1.3.2
  ZDICT_trainFromBuffer_fastCover@Base 1.3.8
  ZDICT_trainFromBuffer_legacy@Base 1.3.2
- ZSTD_CCtxParam_getParameter@Base 1.3.5
- ZSTD_CCtxParam_setParameter@Base 1.3.2
  ZSTD_CCtxParams_getParameter@Base 1.4.0
  ZSTD_CCtxParams_init@Base 1.3.4
  ZSTD_CCtxParams_init_advanced@Base 1.3.4
diff -Nru libzstd-1.5.5+dfsg/debian/rules libzstd-1.5.5+dfsg/debian/rules
--- libzstd-1.5.5+dfsg/debian/rules	2023-02-09 23:42:03.000000000 +0000
+++ libzstd-1.5.5+dfsg/debian/rules	2023-05-21 20:19:46.000000000 +0000
@@ -7,7 +7,9 @@
 export DH_VERBOSE=1
 
 arch ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
-export DEB_BUILD_MAINT_OPTIONS=hardening=+all
+DEB_BUILD_MAINT_OPTIONS=hardening=+all
+DEB_BUILD_MAINT_OPTIONS+=optimize=-lto
+export DEB_BUILD_MAINT_OPTIONS
 
 # Upstream's makefiles will respect PREFIX, and this means we avoid a patch
 export PREFIX=/usr