diff --git a/src/cguittfont/irrUString.h b/src/cguittfont/irrUString.h
index c175c792a..eb7abe5a1 100644
--- a/src/cguittfont/irrUString.h
+++ b/src/cguittfont/irrUString.h
@@ -45,7 +45,7 @@
 #define __BYTE_ORDER 0
 #define __LITTLE_ENDIAN 0
 #define __BIG_ENDIAN 1
-#elif __MACH__
+#elif defined(__MACH__) && defined(__APPLE__)
 #include <machine/endian.h>
 #elif defined(__FreeBSD__)
 #include <sys/endian.h>
diff --git a/src/jthread/jevent.h b/src/jthread/jevent.h
index f97e09ca0..9ea7ebde8 100644
--- a/src/jthread/jevent.h
+++ b/src/jthread/jevent.h
@@ -30,7 +30,7 @@
 
 #ifdef _WIN32
 #include <windows.h>
-#elif __MACH__
+#elif defined(__MACH__) && defined(__APPLE__)
 #include <mach/mach.h>
 #include <mach/task.h>
 #include <mach/semaphore.h>
@@ -43,7 +43,7 @@
 class Event {
 #ifdef _WIN32
 	HANDLE hEvent;
-#elif __MACH__
+#elif defined(__MACH__) && defined(__APPLE__)
 	semaphore_t sem;
 #else
 	sem_t sem;
diff --git a/src/jthread/jsemaphore.h b/src/jthread/jsemaphore.h
index 4ab006aea..32e9bc2f2 100644
--- a/src/jthread/jsemaphore.h
+++ b/src/jthread/jsemaphore.h
@@ -24,7 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <windows.h>
 #include <assert.h>
 #define MAX_SEMAPHORE_COUNT 1024
-#elif __MACH__
+#elif defined(__MACH__) && defined(__APPLE__)
 #include <pthread.h>
 #include <mach/mach.h>
 #include <mach/task.h>
@@ -52,7 +52,7 @@ public:
 private:
 #if defined(WIN32)
 	HANDLE m_hSemaphore;
-#elif __MACH__
+#elif defined(__MACH__) && defined(__APPLE__)
 	semaphore_t m_semaphore;
 	int semcount;
 #else
diff --git a/src/jthread/pthread/jevent.cpp b/src/jthread/pthread/jevent.cpp
index 6a45a37d2..e1d40f4c1 100644
--- a/src/jthread/pthread/jevent.cpp
+++ b/src/jthread/pthread/jevent.cpp
@@ -29,7 +29,7 @@
 
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 #undef sem_t
 #define sem_t semaphore_t
 #undef sem_init
diff --git a/src/jthread/pthread/jsemaphore.cpp b/src/jthread/pthread/jsemaphore.cpp
index 16e001e92..15281ba64 100644
--- a/src/jthread/pthread/jsemaphore.cpp
+++ b/src/jthread/pthread/jsemaphore.cpp
@@ -20,13 +20,13 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <errno.h>
 #include <sys/time.h>
 #include "jthread/jsemaphore.h"
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 #include <unistd.h>
 #endif
 
 #define UNUSED(expr) do { (void)(expr); } while (0)
 
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 #undef sem_t
 #undef sem_init
 #undef sem_wait
@@ -44,7 +44,7 @@ JSemaphore::JSemaphore() {
 	int sem_init_retval = sem_init(&m_semaphore,0,0);
 	assert(sem_init_retval == 0);
 	UNUSED(sem_init_retval);
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	semcount = 0;
 #endif
 }
@@ -73,7 +73,7 @@ void JSemaphore::Post() {
 	int sem_post_retval = sem_post(&m_semaphore);
 	assert(sem_post_retval == 0);
 	UNUSED(sem_post_retval);
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	pthread_mutex_lock(&semcount_mutex);
 	semcount++;
 	pthread_mutex_unlock(&semcount_mutex);
@@ -84,7 +84,7 @@ void JSemaphore::Wait() {
 	int sem_wait_retval = sem_wait(&m_semaphore);
 	assert(sem_wait_retval == 0);
 	UNUSED(sem_wait_retval);
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	pthread_mutex_lock(&semcount_mutex);
 	semcount--;
 	pthread_mutex_unlock(&semcount_mutex);
@@ -92,7 +92,7 @@ void JSemaphore::Wait() {
 }
 
 bool JSemaphore::Wait(unsigned int time_ms) {
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	mach_timespec_t waittime;
 	waittime.tv_sec = time_ms / 1000;
 	waittime.tv_nsec = 1000000 * (time_ms % 1000);
@@ -106,14 +106,14 @@ bool JSemaphore::Wait(unsigned int time_ms) {
 		return false;
 	}
 
-#ifndef __MACH__
+#if !(defined(__MACH__) && defined(__APPLE__))
 	waittime.tv_nsec = ((time_ms % 1000) * 1000 * 1000) + (now.tv_usec * 1000);
 	waittime.tv_sec  = (time_ms / 1000) + (waittime.tv_nsec / (1000*1000*1000)) + now.tv_sec;
 	waittime.tv_nsec %= 1000*1000*1000;
 #endif
 
 	errno = 0;
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	int sem_wait_retval = semaphore_timedwait(m_semaphore, waittime);
 	if (sem_wait_retval == KERN_OPERATION_TIMED_OUT) {
 		errno = ETIMEDOUT;
@@ -128,7 +128,7 @@ bool JSemaphore::Wait(unsigned int time_ms) {
 
 	if (sem_wait_retval == 0)
 	{
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 		pthread_mutex_lock(&semcount_mutex);
 		semcount--;
 		pthread_mutex_unlock(&semcount_mutex);
@@ -144,7 +144,7 @@ bool JSemaphore::Wait(unsigned int time_ms) {
 
 int JSemaphore::GetValue() {
 	int retval = 0;
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 	pthread_mutex_lock(&semcount_mutex);
 	retval = semcount;
 	pthread_mutex_unlock(&semcount_mutex);
diff --git a/src/porting.h b/src/porting.h
index 8387453e8..3d2677564 100644
--- a/src/porting.h
+++ b/src/porting.h
@@ -60,7 +60,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	#include <unistd.h>
 	#include <stdint.h> //for uintptr_t
 
-	#if (defined(linux) || defined(__linux)) && !defined(_GNU_SOURCE)
+#if (defined(linux) || defined(__linux) || defined(__GNU__)) && !defined(_GNU_SOURCE)
 		#define _GNU_SOURCE
 	#endif
 
@@ -228,7 +228,7 @@ void initIrrlicht(irr::IrrlichtDevice * );
 #else // Posix
 #include <sys/time.h>
 #include <time.h>
-#ifdef __MACH__
+#if defined(__MACH__) && defined(__APPLE__)
 #include <mach/clock.h>
 #include <mach/mach.h>
 #endif
@@ -258,7 +258,7 @@ void initIrrlicht(irr::IrrlichtDevice * );
 	{
 		struct timespec ts;
 		// from http://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x
-#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
+#if defined(__MACH__) && defined(__APPLE__) // OS X does not have clock_gettime, use clock_get_time
 		clock_serv_t cclock;
 		mach_timespec_t mts;
 		host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
@@ -358,7 +358,7 @@ inline u32 getDeltaMs(u32 old_time_ms, u32 new_time_ms)
 	inline void setThreadName(const char *name) {
 		pthread_setname_np(name);
 	}
-#elif defined(_WIN32)
+#elif defined(_WIN32) || defined(__GNU__)
 	inline void setThreadName(const char* name) {}
 #else
 	#warning "Unrecognized platform, thread names will not be available."