Define more pieces of portability/GFlags

Summary: Add more compatibility for missing gflags

Reviewed By: yfeldblum

Differential Revision: D3202560

fb-gh-sync-id: d25e4abfe8ceee9fb329c9ba12d259d1d03d4974
fbshipit-source-id: d25e4abfe8ceee9fb329c9ba12d259d1d03d4974

folly/Benchmark.h

@@ -19,6 +19,7 @@
 #include <folly/Portability.h>
 #include <folly/Preprocessor.h> // for FB_ANONYMOUS_VARIABLE
 #include <folly/ScopeGuard.h>
+#include <folly/portability/GFlags.h>
 #include <folly/portability/Time.h>
 
 #include <cassert>
@@ -26,7 +27,6 @@
 #include <boost/function_types/function_arity.hpp>
 #include <functional>
 #include <glog/logging.h>
-#include <gflags/gflags.h>
 #include <limits>
 #include <type_traits>
 

folly/futures/test/Benchmark.cpp

@@ -14,13 +14,12 @@
  * limitations under the License.
  */
 
-#include <gflags/gflags.h>
-
-#include <folly/Baton.h>
 #include <folly/Benchmark.h>
+#include <folly/Baton.h>
 #include <folly/futures/Future.h>
-#include <folly/futures/Promise.h>
 #include <folly/futures/InlineExecutor.h>
+#include <folly/futures/Promise.h>
+#include <folly/portability/GFlags.h>
 
 #include <semaphore.h>
 #include <vector>

folly/portability/GFlags.h

@@ -21,5 +21,25 @@
 #if FOLLY_HAVE_LIBGFLAGS
 #include <gflags/gflags.h>
 #else
-#define DEFINE_int32(_name, _default, _description) int FLAGS_##_name = _default
+#define FOLLY_DECLARE_FLAG(_type, _name) extern _type FLAGS_##_name
+#define DECLARE_bool(_name) FOLLY_DECLARE_FLAG(bool, _name)
+#define DECLARE_double(_name) FOLLY_DECLARE_FLAG(double, _name)
+#define DECLARE_int32(_name) FOLLY_DECLARE_FLAG(int, _name)
+#define DECLARE_int64(_name) FOLLY_DECLARE_FLAG(long long, _name)
+#define DECLARE_uint64(_name) FOLLY_DECLARE_FLAG(unsigned long long, _name)
+#define DECLARE_string(_name) FOLLY_DECLARE_FLAG(std::string, _name)
+
+#define FOLLY_DEFINE_FLAG(_type, _name, _default) _type FLAGS_##_name = _default
+#define DEFINE_bool(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(bool, _name, _default)
+#define DEFINE_double(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(double, _name, _default)
+#define DEFINE_int32(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(int, _name, _default)
+#define DEFINE_int64(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(long long, _name, _default)
+#define DEFINE_uint64(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(unsigned long long, _name, _default)
+#define DEFINE_string(_name, _default, _description) \
+  FOLLY_DEFINE_FLAG(std::string, _name, _default)
 #endif