I am AWFULLY sorry; this was all my fault. ... I tried to compile the file 
from the command line and got the same errors. I tried  gcc -E to do just the 
preprocessing, and the declaration was there OK. I checked the code, and 
there it was, glaring:

	struct timeval system_time;
	...
	gettimeofday(&timeval, 0);
	...

&timeval????? SHAME on me!  I'll try to get smarter ...

Thanks again.

Nacho de los Ríos Tormo
Procedimientos Integrados S.L.
Sevillanos, 67
28609 Sevilla la Nueva, Madrid
SPAIN