backport examples from main

examples/cpp/weighted_tardiness_sat.cc

@@ -13,12 +13,15 @@
 
 #include <algorithm>
 #include <cstdint>
+#include <cstdlib>
 #include <numeric>
 #include <string>
 #include <vector>
 
+#include "absl/base/log_severity.h"
 #include "absl/flags/flag.h"
 #include "absl/log/check.h"
+#include "absl/log/globals.h"
 #include "absl/strings/numbers.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
@@ -252,7 +255,7 @@ void ParseAndSolve() {
 }  // namespace operations_research
 
 int main(int argc, char** argv) {
-  absl::SetFlag(&FLAGS_stderrthreshold, 0);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   InitGoogle(argv[0], &argc, &argv, true);
   if (absl::GetFlag(FLAGS_input).empty()) {
     LOG(FATAL) << "Please supply a data file with --input=";