1 files changed, 32 insertions, 4 deletions
diff --git a/host/include/uhd/utils/byteswap.hpp b/host/include/uhd/utils/byteswap.hpp
index 779b48ec9..dd5dcbc09 100644
--- a/host/include/uhd/utils/byteswap.hpp
+++ b/host/include/uhd/utils/byteswap.hpp
@@ -57,11 +57,10 @@ namespace uhd{
         return _byteswap_uint64(x);
     }
 
-#elif defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 3
-    #include <byteswap.h>
+#elif defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 2
 
     UHD_INLINE boost::uint16_t uhd::byteswap(boost::uint16_t x){
-        return bswap_16(x); //no __builtin_bswap16
+        return (x>>8) | (x<<8); //DNE return __builtin_bswap16(x);
     }
 
     UHD_INLINE boost::uint32_t uhd::byteswap(boost::uint32_t x){
@@ -72,7 +71,22 @@ namespace uhd{
         return __builtin_bswap64(x);
     }
 
-#else
+#elif defined(__FreeBSD__) || defined(__MACOSX__) || defined(__APPLE__)
+    #include <libkern/OSByteOrder.h>
+
+    UHD_INLINE boost::uint16_t uhd::byteswap(boost::uint16_t x){
+        return OSSwapInt16(x);
+    }
+
+    UHD_INLINE boost::uint32_t uhd::byteswap(boost::uint32_t x){
+        return OSSwapInt32(x);
+    }
+
+    UHD_INLINE boost::uint64_t uhd::byteswap(boost::uint64_t x){
+        return OSSwapInt64(x);
+    }
+
+#elif defined(linux) || defined(__linux)
     #include <byteswap.h>
 
     UHD_INLINE boost::uint16_t uhd::byteswap(boost::uint16_t x){
@@ -87,6 +101,20 @@ namespace uhd{
         return bswap_64(x);
     }
 
+#else //http://www.koders.com/c/fidB93B34CD44F0ECF724F1A4EAE3854BA2FE692F59.aspx
+
+    UHD_INLINE boost::uint16_t uhd::byteswap(boost::uint16_t x){
+        return (x>>8) | (x<<8);
+    }
+
+    UHD_INLINE boost::uint32_t uhd::byteswap(boost::uint32_t x){
+        return (boost::uint32_t(uhd::byteswap(boost::uint16_t(x&0xfffful)))<<16) | (uhd::byteswap(boost::uint16_t(x>>16)));
+    }
+
+    UHD_INLINE boost::uint64_t uhd::byteswap(boost::uint64_t x){
+        return (boost::uint64_t(uhd::byteswap(boost::uint32_t(x&0xffffffffull)))<<32) | (uhd::byteswap(boost::uint32_t(x>>32)));
+    }
+
 #endif
 
 #endif /* INCLUDED_UHD_UTILS_BYTESWAP_HPP */