Add a pragma to disable a maybe-uninitialized warning for GCC12+

PiperOrigin-RevId: 592301543
Change-Id: I97e4df805c7313896228430a50a7f991127f3e30

absl/container/BUILD.bazel

@@ -126,6 +126,7 @@ cc_library(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [
         ":compressed_tuple",
+        "//absl/base:config",
         "//absl/base:core_headers",
         "//absl/memory",
         "//absl/meta:type_traits",

absl/container/CMakeLists.txt

@@ -177,6 +177,7 @@ absl_cc_library(
     ${ABSL_DEFAULT_COPTS}
   DEPS
     absl::compressed_tuple
+    absl::config
     absl::core_headers
     absl::memory
     absl::span

absl/container/internal/inlined_vector.h

@@ -26,6 +26,7 @@
 #include <utility>
 
 #include "absl/base/attributes.h"
+#include "absl/base/config.h"
 #include "absl/base/macros.h"
 #include "absl/container/internal/compressed_tuple.h"
 #include "absl/memory/memory.h"
@@ -384,7 +385,17 @@ class Storage {
 
   bool GetIsAllocated() const { return GetSizeAndIsAllocated() & 1; }
 
-  Pointer<A> GetAllocatedData() { return data_.allocated.allocated_data; }
+  Pointer<A> GetAllocatedData() {
+    // GCC 12 has a false-positive -Wmaybe-uninitialized warning here.
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+    return data_.allocated.allocated_data;
+#if ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(12, 0)
+#pragma GCC diagnostic pop
+#endif
+  }
 
   ConstPointer<A> GetAllocatedData() const {
     return data_.allocated.allocated_data;