diff --git a/0017-gcc-12-omnibus.patch b/0017-gcc-12-omnibus.patch
new file mode 100644
index 0000000..8aef69f
--- /dev/null
+++ b/0017-gcc-12-omnibus.patch
@@ -0,0 +1,83 @@
+--- ceph-16.2.7/src/include/buffer.h.orig	2022-01-17 12:17:19.193356237 -0500
++++ ceph-16.2.7/src/include/buffer.h	2022-01-17 12:17:58.599639592 -0500
+@@ -38,6 +38,7 @@
+ # include <sys/mman.h>
+ #endif
+ 
++#include <memory>
+ #include <iosfwd>
+ #include <iomanip>
+ #include <list>
+--- ceph-16.2.7/src/common/LogEntry.cc.orig	2022-01-17 13:52:10.799134159 -0500
++++ ceph-16.2.7/src/common/LogEntry.cc	2022-01-17 13:52:47.244469274 -0500
+@@ -183,7 +183,7 @@
+       return "crit";
+     default:
+       ceph_abort();
+-      return 0;
++      return "";
+   }
+ }
+ 
+--- ceph-16.2.7/src/common/dout.h.orig	2022-01-18 08:58:11.805226954 -0500
++++ ceph-16.2.7/src/common/dout.h	2022-01-19 08:06:23.987388663 -0500
+@@ -99,11 +99,15 @@
+ template<typename T>
+ struct dynamic_marker_t {
+   T value;
+-  operator T() const { return value; }
++  // constexpr ctor isn't needed as it's an aggregate type
++  constexpr operator T() const { return value; }
+ };
+ 
+ template<typename T>
+-dynamic_marker_t<T> need_dynamic(T&& t) {
++constexpr dynamic_marker_t<T> need_dynamic(T&& t) {
++  // deprecated in C++17 but that's fine for testing
++  static_assert(std::is_literal_type_v<T>);
++  static_assert(std::is_literal_type_v<dynamic_marker_t<T>>);
+   return dynamic_marker_t<T>{ std::forward<T>(t) };
+ }
+ 
+--- ceph-16.2.7/src/test/librados/tier_cxx.cc.orig	2022-01-19 09:30:47.209459506 -0500
++++ ceph-16.2.7/src/test/librados/tier_cxx.cc	2022-01-19 10:02:47.783240298 -0500
+@@ -114,7 +114,7 @@
+ #include "rgw/rgw_common.h"
+ 
+ void check_fp_oid_refcount(librados::IoCtx& ioctx, std::string foid, uint64_t count,
+-			   std::string fp_algo = NULL)
++			   std::string fp_algo = "")
+ {
+   bufferlist t;
+   int size = foid.length();
+@@ -142,7 +142,7 @@
+   ASSERT_LE(count, refs.count());
+ }
+ 
+-string get_fp_oid(string oid, std::string fp_algo = NULL)
++string get_fp_oid(string oid, std::string fp_algo = "")
+ {
+   if (fp_algo == "sha1") {
+     unsigned char fingerprint[CEPH_CRYPTO_SHA1_DIGESTSIZE + 1];
+--- ceph-16.2.7/src/test/test_trans.cc.orig	2022-01-19 13:24:33.460008897 -0500
++++ ceph-16.2.7/src/test/test_trans.cc	2022-01-19 13:24:58.211554005 -0500
+@@ -51,7 +51,7 @@
+   cout << "#dev " << filename << std::endl;
+   cout << "#mb " << mb << std::endl;
+ 
+-  ObjectStore *fs = new FileStore(cct.get(), filename, NULL);
++  ObjectStore *fs = new FileStore(cct.get(), filename, "");
+   if (fs->mount() < 0) {
+     cout << "mount failed" << std::endl;
+     return -1;
+--- ceph-16.2.7/src/s3select/include/s3select_functions.h.orig	2022-01-19 15:06:45.312783565 -0500
++++ ceph-16.2.7/src/s3select/include/s3select_functions.h	2022-01-19 15:08:17.270087590 -0500
+@@ -142,7 +142,7 @@
+ 
+   virtual std::string  print(int ident)
+   {
+-    return std::string(0);
++    return std::string("");
+   }
+ 
+   void push_argument(base_statement* arg)
diff --git a/ceph.spec b/ceph.spec
index e7ca90e..8d6ebcf 100644
--- a/ceph.spec
+++ b/ceph.spec
@@ -128,7 +128,7 @@
 #################################################################################
 Name:		ceph
 Version:	16.2.7
-Release:	3%{?dist}
+Release:	4%{?dist}
 %if 0%{?fedora} || 0%{?rhel}
 Epoch:		2
 %endif
@@ -152,6 +152,7 @@ Patch0008:	0008-cmake-modules-Finduring.cmake.patch
 Patch0014:	0014-rgw-Replace-boost-string_ref-view-with-std-string_vi.patch
 Patch0015:	0015-src-kv-rocksdb_cache.patch
 Patch0016:	0016-src-tracing-patch
+Patch0017:	0017-gcc-12-omnibus.patch
 # Source1:	cmake-modules-BuildBoost.cmake.noautopatch
 # ceph 14.0.1 does not support 32-bit architectures, bugs #1727788, #1727787
 ExcludeArch:	i686 armv7hl
@@ -2516,6 +2517,9 @@ exit 0
 %config %{_sysconfdir}/prometheus/ceph/ceph_default_alerts.yml
 
 %changelog
+* Thu Jan 20 2022 Kaleb S. KEITHLEY <kkeithle[at]redhat.com> - 2:16.2.7-4
+- 16.2.7, rebuild with gcc-12
+
 * Mon Jan 10 2022 Kaleb S. KEITHLEY <kkeithle[at]redhat.com> - 2:16.2.7-3
 - 16.2.7, rebuild with fmt-8.1.1