Bump flatbuffers to v24.3.25 version (#6968)

third_party/flatbuffers/grpc/samples/greeter/Makefile

@@ -0,0 +1,14 @@
+CXXFLAGS ?= -I../../../include
+LDFLAGS ?=
+
+.PHONY: all
+all: server client
+
+greeter_generated: greeter.fbs
+	flatc --grpc --cpp $<
+
+server: greeter_generated server.cpp greeter.grpc.fb.cc greeter.grpc.fb.h
+	g++ -std=c++11 -O2 $(CXXFLAGS) $(LDFLAGS) -lgpr -lgrpc -lgrpc++ server.cpp greeter.grpc.fb.cc -o $@
+
+client: greeter_generated client.cpp greeter.grpc.fb.cc greeter.grpc.fb.h
+	g++ -std=c++11 -O2 $(CXXFLAGS) $(LDFLAGS) -lgpr -lgrpc -lgrpc++ client.cpp greeter.grpc.fb.cc -o $@

third_party/flatbuffers/grpc/samples/greeter/client.cpp

@@ -1,7 +1,7 @@
 #include "greeter.grpc.fb.h"
 #include "greeter_generated.h"
 
-#include <grpc++/grpc++.h>
+#include <grpcpp/grpcpp.h>
 
 #include <iostream>
 #include <memory>

third_party/flatbuffers/grpc/samples/greeter/server.cpp

@@ -1,7 +1,7 @@
 #include "greeter.grpc.fb.h"
 #include "greeter_generated.h"
 
-#include <grpc++/grpc++.h>
+#include <grpcpp/grpcpp.h>
 
 #include <iostream>
 #include <memory>
@@ -12,7 +12,8 @@ class GreeterServiceImpl final : public Greeter::Service {
       grpc::ServerContext *context,
       const flatbuffers::grpc::Message<HelloRequest> *request_msg,
       flatbuffers::grpc::Message<HelloReply> *response_msg) override {
-    // flatbuffers::grpc::MessageBuilder mb_;
+    flatbuffers::grpc::MessageBuilder mb_;
+
     // We call GetRoot to "parse" the message. Verification is already
     // performed by default. See the notes below for more details.
     const HelloRequest *request = request_msg->GetRoot();