--- boost1.41-1.41.0.orig/libs/thread/src/pthread/thread.cpp
+++ boost1.41-1.41.0/libs/thread/src/pthread/thread.cpp
@@ -13,7 +13,7 @@
 #include <boost/thread/locks.hpp>
 #include <boost/thread/once.hpp>
 #include <boost/thread/tss.hpp>
-#ifdef __linux__
+#ifdef __GLIBC__
 #include <sys/sysinfo.h>
 #elif defined(__APPLE__) || defined(__FreeBSD__)
 #include <sys/types.h>
@@ -380,7 +380,7 @@
     {
 #if defined(PTW32_VERSION) || defined(__hpux)
         return pthread_num_processors_np();
-#elif defined(_GNU_SOURCE)
+#elif defined(__GLIBC__)
         return get_nprocs();
 #elif defined(__APPLE__) || defined(__FreeBSD__)
         int count;