Installation problem

Hi
i am trying to install Nagios 3.0.3 on Opensuse 11.0 and the ./configure returns the foolowing messages in the config.log:


configure:3149: checking pthreads.h usability
configure:3161: gcc -c -g -O2 conftest.c >&5
conftest.c:68:22: error: pthreads.h: No such file or directory
configure:3167: $? = 1
configure: failed program was:
| /* confdefs.h. */
|
| #define PACKAGE_NAME “”
| #define PACKAGE_TARNAME “”
| #define PACKAGE_VERSION “”
| #define PACKAGE_STRING “”
| #define PACKAGE_BUGREPORT “”
| #define STDC_HEADERS 1

the "make is not dreated

Does somebody have an idea?