Re: [Discuss-gnuradio] Compilation error in 0.6 / CVS

[Stephane Fillod]

> I get an error while trying to build the current (or the 0.6 release) sources
> on a debian 3 / gcc 2.95.4 / kernel 2.4.19 system.

This is a problem with gcc version that does not accept volatile asm in
templates.

Problem is fairly old, as reported in 
        http://gcc.gnu.org/ml/gcc-bugs/1998-09/msg00504.html

Here is a fix that does workaround the problem (tested with gcc 2.95.4).
A nicer fix would require the inclusion of config.h, but since
GrTCPSink.h is an exported header, this is not possible.

73
Stephane


--- gnuradio-cvs-0.6/src/gnu/lib/grio/GrTCPSink.h       2002-05-19 
08:41:42.000000000 +0200
+++ gnuradio/src/gnu/lib/grio/GrTCPSink.h       2002-12-18 21:40:00.000000000 
+0100
@@ -34,6 +34,25 @@
 
 using std::vector;
 
+
+/*
+ * versions prior to gcc-3.x croak on volatile asm in templates,
+ * hence the following workaround
+ */
+static inline unsigned long int _replace_htonl (unsigned long int hostlong)
+{
+       return htonl(hostlong);
+}
+static inline unsigned short int _replace_htons (unsigned short int hostshort)
+{
+       return htons(hostshort);
+}
+#undef htonl
+#undef htons
+#define htonl _replace_htonl
+#define htons _replace_htons
+
+
 template <class iType>
 class GrTCPSink : public VrSink<iType>
 {
@@ -180,5 +199,9 @@
   close (listen_socket);
 }
 
+#undef htonl
+#undef htons
+#define htonl htonl
+#define htons htons
 
 #endif // _GRTCPSINK_H_