From 43ce4f61352d6fcd5af4ed9ea22226052ed2f111 Mon Sep 17 00:00:00 2001
From: Gabriele Gristina <gabriele.gristina@gmail.com>
Date: Tue, 26 Dec 2017 14:09:30 +0100
Subject: [PATCH] Add checks for clock_gettime() support in Makefile

---
 include/timer.h | 2 +-
 src/Makefile    | 6 ++++++
 src/timer.c     | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/timer.h b/include/timer.h
index 7129303e8..63a23db30 100644
--- a/include/timer.h
+++ b/include/timer.h
@@ -6,7 +6,7 @@
 #ifndef _TIMER_H
 #define _TIMER_H
 
-#if defined(__APPLE__)
+#if defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
 #include <sys/time.h>
 #include <mach/clock.h>
 #include <mach/mach.h>
diff --git a/src/Makefile b/src/Makefile
index 5a2ff193c..ae491b6f5 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -92,6 +92,7 @@ ifeq ($(UNAME),Darwin)
 CC                      := clang
 # the sed -i option of macOS requires a parameter for the backup file (we just use "")
 SED_IN_PLACE            := -i ""
+PROD_VERS               := $(shell sw_vers -productVersion | cut -d. -f2)
 endif
 
 ifeq ($(UNAME),FreeBSD)
@@ -215,6 +216,11 @@ endif # FreeBSD
 ifeq ($(UNAME),Darwin)
 export MACOSX_DEPLOYMENT_TARGET=10.9
 CFLAGS_NATIVE           := $(CFLAGS)
+
+ifeq ($(shell test $(PROD_VERS) -le 11; echo $$?), 0)
+CFLAGS_NATIVE           += -DMISSING_CLOCK_GETTIME
+endif
+
 LFLAGS_NATIVE           := $(LFLAGS)
 LFLAGS_NATIVE           += -framework OpenCL
 LFLAGS_NATIVE           += -lpthread
diff --git a/src/timer.c b/src/timer.c
index ad1ccbf86..4cda1f092 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -33,7 +33,7 @@ inline double hc_timer_get (hc_timer_t a)
 
 inline void hc_timer_set (hc_timer_t* a)
 {
-  #if defined (__APPLE__)
+  #if defined(__APPLE__) && defined(MISSING_CLOCK_GETTIME)
   // taken from proxmark3/client/util_posix
   static uint64_t clock_start_time = 0;
   static mach_timebase_info_data_t timebase_info = {0, 0};