8326109: GCC 13 reports maybe-uninitialized warnings for jni.cpp with dtrace enabled

Reviewed-by: phh

Author: gnu-andrew

make/hotspot/lib/JvmOverrideFiles.gmk

@@ -40,6 +40,10 @@ ifeq ($(TOOLCHAIN_TYPE), gcc)
     # Need extra inlining to collapse all marking code into the hot marking loop
     BUILD_LIBJVM_shenandoahConcurrentMark.cpp_CXXFLAGS := --param inline-unit-growth=1000
   endif
+  ifeq ($(call check-jvm-feature, dtrace), true)
+    # DTRACE_PROBE macros trigger a maybe-uninitialized warning on 'ret'
+    BUILD_LIBJVM_jni.cpp_CXXFLAGS := -Wno-maybe-uninitialized
+  endif
 endif
 
 LIBJVM_FDLIBM_COPY_OPT_FLAG := $(CXX_O_FLAG_NONE)