Someone have had good luck compilig h323 into YDL? first thinked was a bug in code but "twisted" said it is " wierd - isn't that the recursive pthread lib? If so, do you have the kernel development headers/libs installed?" I've instaled kernel source, what more can i do? any help would be very wellcome, i've googled everywhere but can't find nothing about it. make install new error gcc -pipe -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -g -Iinclude -I../include -D_REENTRANT -D_GNU_SOURCE -O6 -fsigned-char -DZAPTEL_OPTIMIZATIONS -DASTERISK_VERSION=\"CVS-NHEAD-01/17/05-19:15:56\" -DASTERISK_VERSION_NUM=999999 -DINSTALL_PREFIX=\"\" -DASTETCDIR=\"/etc/asterisk\" -DASTLIBDIR=\"/usr/lib/asterisk\" -DASTVARLIBDIR=\"/var/lib/asterisk\" -DASTVARRUNDIR=\"/var/run\" -DASTSPOOLDIR=\"/var/spool/asterisk\" -DASTLOGDIR=\"/var/log/asterisk\" -DASTCONFPATH=\"/etc/asterisk/asterisk.conf\" -DASTMODDIR=\"/usr/lib/asterisk/modules\" -DASTAGIDIR=\"/var/lib/asterisk/agi-bin\" -DBUSYDETECT_MARTIN -Wno-missing-prototypes -Wno-missing-declarations -DZAPATA_PRI -DIAX_TRUNKING -DCRYPTO -fPIC -c -o chan_h323.o chan_h323.c gcc -shared -Xlinker -x -o chan_h323.so chan_h323.o h323/libchanh323.a -ldl -L/usr/src/pwlib/lib -lpt_linux_x86_r -L/usr/src/openh323/lib -lh323_linux_x86_r -L/usr/lib -lcrypto -lssl -lexpat /usr/bin/ld: cannot find -lpt_linux_x86_r collect2: ld returned 1 exit status make[1]: *** [chan_h323.so] Error 1 make[1]: Leaving directory `/mnt/60gbide2/usr/src/asterisk/channels' make: *** [subdirs] Error 1 [root@asterisk asterisk]# Adri? Vidal