Hello, I did go for option 3 as I'm not considering portability (yet). It compiled with no problems now. Thank you very much for your help.
On Sun, Nov 28, 2010 at 10:39, Roger Light <[email protected]> wrote: > Hi Diogo, > > > /root/mosquitto-0.9/src/persist.c:472: undefined reference to `be64toh' > > /root/mosquitto-0.9/src/persist.c:306: undefined reference to `htobe64' > > The be64toh() and htobe64() functions are in glibc from version 2.9. > If you have an earlier version or nslu2 uses one of the other C > libraries (which is quite likely), then those functions aren't > available. > > The functions are used when writing out the persistent database, which > stores subscriptions and retained messages for when the broker > restarts. This is generally regarded as a good and useful thing. > > You've got three choices. > > 1. Uncomment the line "#define WITH_32BIT_DBID" in config.h and > recompile. This means: > > Compile with 32-bit integer database IDs instead of 64-bit integers. > May be useful in embedded systems or where be64toh()/htobe64() aren't > available. There is the potential for bad things to happen after the > IDs wrap around. This is especially likely if there are old retained > messages. Note that at a sustained rate of 10,000 messages/s, the > database ID would overflow every 5 days. It is also worth noting that > a broker compiled with 64-bit DB IDs will not load a persistent > database file saved from a 32-bit DB ID broker and vice versa. > > 2. Remove persistent database support completely by commenting out the > line "#define WITH_PERSISTENCE" in config.h, then recompile. This will > keep using 64-bit database IDs, but won't be writing them to disk at > any time so won't need the missing functions. > > 3. Don't worry about the portability of the persistent database file. > If the file isn't going to move to a different computer, it doesn't > matter if the data is potentially stored with mixed endian.To do this, > add the following to config.h and recompile. > > #define be64toh(x) (x) > #define htobe64(x) (x) > > I'd probably go for option 3. > > It might be worth your while looking at some of the other options in > config.h - unless you've been using mosquitto before you won't have > any of the old sqlite dbs that need upgrading. You can comment out > WITH_SQLITE_UPGRADE and remove "-lsqlite3" from config.mk to save on a > bit of memory. > > Cheers, > > Roger > > _______________________________________________ > Mailing list: https://launchpad.net/~mqtt-users > Post to : [email protected] > Unsubscribe : https://launchpad.net/~mqtt-users > More help : https://help.launchpad.net/ListHelp > -- Diogo Mamede
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