diff --git a/src/gos/gfx_linux.c b/src/gos/gfx_linux.c
index 59b7f9c8..fc716ec9 100644
--- a/src/gos/gfx_linux.c
+++ b/src/gos/gfx_linux.c
@@ -9,10 +9,20 @@
 
 #if GFX_USE_OS_LINUX
 
+// Linux seems to have deprecated pthread_yield() and now says to use sched_yield()
+#define		USE_SCHED_NOT_PTHREAD_YIELD		TRUE
+
 #include <stdio.h>
 #include <unistd.h>
 #include <errno.h>
+#include <sys/time.h>
 #include <time.h>
+#if USE_SCHED_NOT_PTHREAD_YIELD
+	#include <sched.h>
+	#define linuxyield()	sched_yield()
+#else
+	#define linuxyield()	pthread_yield()
+#endif
 
 static gfxMutex		SystemMutex;
 
@@ -35,6 +45,10 @@ void gfxSystemUnlock(void) {
 	gfxMutexExit(&SystemMutex);
 }
 
+void gfxYield(void) {
+	linuxyield();
+}
+
 void gfxHalt(const char *msg) {
 	if (msg)
 		fprintf(stderr, "%s\n", msg);
@@ -46,7 +60,7 @@ void gfxSleepMilliseconds(delaytime_t ms) {
 
 	switch(ms) {
 		case TIME_IMMEDIATE:
-			pthread_yield();
+			linuxyield();
 			return;
 
 		case TIME_INFINITE:
@@ -67,7 +81,7 @@ void gfxSleepMicroseconds(delaytime_t ms) {
 
 	switch(ms) {
 		case TIME_IMMEDIATE:
-			pthread_yield();
+			linuxyield();
 			return;
 
 		case TIME_INFINITE:
@@ -93,6 +107,9 @@ systemticks_t gfxSystemTicks(void) {
 
 gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
 	gfxThreadHandle		th;
+	(void)				stackarea;
+	(void)				stacksz;
+	(void)				prio;
 
 	// Implementing priority with pthreads is a rats nest that is also pthreads implementation dependent.
 	// Only some pthreads schedulers support it, some implementations use the operating system process priority mechanisms.
@@ -151,7 +168,7 @@ bool_t gfxSemWait(gfxSem *pSem, delaytime_t ms) {
 				struct timeval now;
 				struct timespec	tm;
 
-				gettimeofday(&now);
+				gettimeofday(&now, 0);
 				tm.tv_sec = now.tv_sec + ms / 1000;
 				tm.tv_nsec = (now.tv_usec + ms % 1000) * 1000;
 				while (!pSem->cnt) {
diff --git a/src/gos/gfx_linux.h b/src/gos/gfx_linux.h
index 9ead9c0e..bd31184e 100644
--- a/src/gos/gfx_linux.h
+++ b/src/gos/gfx_linux.h
@@ -34,7 +34,6 @@ typedef pthread_mutex_t		gfxMutex;
 #define gfxRealloc(p,osz,nsz)			realloc(p, nsz)
 #define gfxFree(ptr)					free(ptr)
 #define gfxMillisecondsToTicks(ms)		(ms)
-#define gfxYield()						pthread_yield()
 #define gfxThreadMe()					pthread_self()
 #define gfxThreadClose(th)				(void)th
 #define gfxMutexInit(pmtx)				pthread_mutex_init(pmtx, 0)
@@ -67,6 +66,7 @@ typedef struct gfxSem {
 extern "C" {
 #endif
 
+void gfxYield(void);
 void gfxHalt(const char *msg);
 void gfxSleepMilliseconds(delaytime_t ms);
 void gfxSleepMicroseconds(delaytime_t ms);
diff --git a/src/gos/gfx_osx.c b/src/gos/gfx_osx.c
index 50b06530..f2e58f77 100644
--- a/src/gos/gfx_osx.c
+++ b/src/gos/gfx_osx.c
@@ -30,7 +30,7 @@ void get_ticks(mach_timespec_t *mts){
 	clock_get_time(cclock, mts);
 	mach_port_deallocate(mach_task_self(), cclock);
 
-	
+
 }
 
 void _gosInit(void)
@@ -89,16 +89,19 @@ void gfxSleepMicroseconds(delaytime_t ms) {
 systemticks_t gfxSystemTicks(void) {
 	//struct timespec	ts;
 	//clock_gettime(CLOCK_MONOTONIC, &ts);
-	
+
 	mach_timespec_t ts;
 	get_ticks(&ts);
-	
-	
+
+
 	return ts.tv_sec * 1000UL + ts.tv_nsec / 1000UL;
 }
 
 gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param) {
 	gfxThreadHandle		th;
+	(void)				stackarea;
+	(void)				stacksz;
+	(void)				prio;
 
 	// Implementing priority with pthreads is a rats nest that is also pthreads implementation dependent.
 	//	Only some pthreads schedulers support it, some implementations use the operating system process priority mechanisms.