fix build with bionic c

examples/OpenGLWindow/X11OpenGLWindow.cpp

@@ -566,7 +566,7 @@ void X11OpenGLWindow::enableOpenGL()
 	//Access pthreads as a workaround for a bug in Linux/Ubuntu
 	//See https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-319/+bug/1248642
 
-#if !defined(__NetBSD__)
+#if !defined(__NetBSD__) && !defined(__ANDROID__)
 	int i = pthread_getconcurrency();
 	printf("pthread_getconcurrency()=%d\n", i);
 #endif

examples/SharedMemory/PosixSharedMemory.cpp

@@ -8,6 +8,11 @@
 #define TEST_SHARED_MEMORY
 #endif  //_WIN32
 
+//Shmem not available on target api < 26
+#if defined(__ANDROID_API__) && (__ANDROID_API__ < 26)
+#undef TEST_SHARED_MEMORY
+#endif  //__ANDROID__
+
 #include <stddef.h>
 
 #ifdef TEST_SHARED_MEMORY