Add checks for clock_gettime() support in Makefile

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>

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

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};