Nagios plugin errors

Hi! I get the following errors compiling nagios plugins 1.4.8 on my machine. Can anyone tell me what it means?

make[1]: Entering directory /home/admin.dk/nagios_2.9_install/nagios-plugins-1.4.8/plugins' /bin/sh ../libtool --tag=CC --mode=link gcc -g -O2 -L. -L/usr/local/ssl/lib -o check_http check_http.o sslutils.o netutils.o utils.o ../lib/libnagiosplug.a ../gl/libgnu.a -lnsl -lresolv -lssl -lcrypto gcc -g -O2 -o check_http check_http.o sslutils.o netutils.o utils.o -L/home/admin.dk/nagios_2.9_install/nagios-plugins-1.4.8/plugins -L/usr/local/ssl/lib ../lib/libnagiosplug.a ../gl/libgnu.a -lnsl -lresolv -lssl -lcrypto /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x4e): In functiondlfcn_load’:
: undefined reference to dlopen' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0xbb): In functiondlfcn_load’:
: undefined reference to dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0xf4): In functiondlfcn_load’:
: undefined reference to dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x16d): In functiondlfcn_unload’:
: undefined reference to dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x22c): In functiondlfcn_bind_var’:
: undefined reference to dlsym' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x2a8): In functiondlfcn_bind_var’:
: undefined reference to dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x324): In functiondlfcn_bind_func’:
: undefined reference to dlsym' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o)(.text+0x37c): In functiondlfcn_bind_func’:
: undefined reference to dlerror' collect2: ld returned 1 exit status make[1]: *** [check_http] Error 1 make[1]: Leaving directory/home/admin.dk/nagios_2.9_install/nagios-plugins-1.4.8/plugins’
make: *** [install-recursive] Error 1

Thanks.

I’ve got similar errors while compiling NRPE plugin having 0.9.8e version of OpenSSL installed. The problem disappeared after downgrade OpenSSL into 0.9.7m version.

Thanks for the reply, I’ll get SSL installed and give it a shot.