Add a check for minimum supported Abseil version.

PiperOrigin-RevId: 532235063

src/google/protobuf/port_def.inc

@@ -209,6 +209,21 @@ static_assert(PROTOBUF_MSC_VER_MIN(1910), "Protobuf only supports MSVC 2017 and
 #endif
 static_assert(PROTOBUF_CPLUSPLUS_MIN(201402L), "Protobuf only supports C++14 and newer.");
 
+// Check minimum Abseil version.
+#if defined(ABSL_LTS_RELEASE_VERSION) && defined(ABSL_LTS_RELEASE_PATCH_LEVEL)
+#define PROTOBUF_ABSL_MIN(x, y)      \
+  (ABSL_LTS_RELEASE_VERSION > (x) || \
+   (ABSL_LTS_RELEASE_VERSION == (x) && ABSL_LTS_RELEASE_PATCH_LEVEL >= (y)))
+#else
+// If we can't find an Abseil version, it's either not installed at all (which
+// should trigger cmake errors), using a non-LTS release, or just isn't used in
+// this file.
+#define PROTOBUF_ABSL_MIN(x, y) 1
+#endif
+
+static_assert(PROTOBUF_ABSL_MIN(20230125, 3),
+              "Protobuf only supports Abseil version 20230125.3 and newer.");
+
 // Future versions of protobuf will include breaking changes to some APIs.
 // This macro can be set to enable these API changes ahead of time, so that
 // user code can be updated before upgrading versions of protobuf.

src/google/protobuf/port_undef.inc

@@ -48,6 +48,7 @@
 #undef PROTOBUF_CLANG_MIN
 #undef PROTOBUF_MSC_VER_MIN
 #undef PROTOBUF_CPLUSPLUS_MIN
+#undef PROTOBUF_ABSL_MIN
 #undef PROTOBUF_ALWAYS_INLINE
 #undef PROTOBUF_ALWAYS_INLINE_CALL
 #undef PROTOBUF_NDEBUG_INLINE