Make RocksDB compile without gflags

Summary: We want to make sure people without gflags can compile RocksDB.

Test Plan: remove gflags, make all

Reviewers: sdong, rven, yhchiang, ljin

Reviewed By: ljin

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D29469

util/benchharness.cc

@@ -17,25 +17,13 @@
 #include <utility>
 #include <vector>
 
-#include <gflags/gflags.h>
-
-using std::function;
-using std::get;
-using std::make_pair;
-using std::max;
-using std::min;
-using std::pair;
-using std::sort;
-using std::string;
-using std::tuple;
-using std::vector;
-
 #ifndef GFLAGS
 bool FLAGS_benchmark = false;
 uint64_t FLAGS_bm_min_usec = 100;
-int64_t FLAGS_bm_min_iter = 1;
+int64_t FLAGS_bm_min_iters = 1;
 int32_t FLAGS_bm_max_secs = 1;
 #else
+#include <gflags/gflags.h>
 DEFINE_bool(benchmark, false, "Run benchmarks.");
 
 DEFINE_uint64(bm_min_usec, 100,
@@ -48,6 +36,17 @@ DEFINE_int32(bm_max_secs, 1,
              "Maximum # of seconds we'll spend on each benchmark.");
 #endif  // GFLAGS
 
+using std::function;
+using std::get;
+using std::make_pair;
+using std::max;
+using std::min;
+using std::pair;
+using std::sort;
+using std::string;
+using std::tuple;
+using std::vector;
+
 namespace rocksdb {
 namespace benchmark {
 

util/options_test.cc

@@ -13,7 +13,6 @@
 
 #include <unordered_map>
 #include <inttypes.h>
-#include <gflags/gflags.h>
 
 #include "rocksdb/options.h"
 #include "rocksdb/table.h"
@@ -23,8 +22,13 @@
 #include "rocksdb/utilities/leveldb_options.h"
 #include "rocksdb/utilities/convenience.h"
 
+#ifndef GFLAGS
+bool FLAGS_enable_print = false;
+#else
+#include <gflags/gflags.h>
 using GFLAGS::ParseCommandLineFlags;
 DEFINE_bool(enable_print, false, "Print options generated to console.");
+#endif  // GFLAGS
 
 namespace rocksdb {
 
@@ -357,6 +361,8 @@ TEST(OptionsTest, ConvertOptionsTest) {
 }  // namespace rocksdb
 
 int main(int argc, char** argv) {
+#ifdef GFLAGS
   ParseCommandLineFlags(&argc, &argv, true);
+#endif  // GFLAGS
   return rocksdb::test::RunAllTests();
 }