We have a php application that makes a heavy use of RRDTool both in Web scripts and CLI scripts.
Since we upgraded to debian wheezy on which php 5.4 is the default, our rrdtool functions return just void at each call, with absolutely no error.
These function seem to be really called, as changing the name to a fake one rises an error, but the result is empty (even for rrd_version())
PHP 5.4 is compiled with rrd support, rrdtool and librrd4 are installed. The commmand line ̀ rrdtoolworks well. We tried to installphp5-rrdtool`, we tried the same stack on another machine which worked well and we can't find any similar experience on internet.
strace shows no external call to rrd files (so it doesn't even start to read the file we provide), LD_DEBUG=all shows plenty of symbols from librrd4 (so the library seems to be really linked)
We do think it's a problem bound to our very system, a conflict or something like that, but we can't figure out how to debug it. Do you have some idea on how to debug this painful problem [ah, and I forgot to say it's a production-only problem, with thousands of graphs not served since yesterday to our clients :-(]
