[root@radio apps]# make
cc -fPIC   -c -o app_nv_faxdetect.o app_nv_faxdetect.c
In file included from app_nv_faxdetect.c:26:
/usr/include/asterisk/file.h:27:2: #error You must include stdio.h before file.h!
In file included from /usr/include/asterisk/linkedlists.h:23,
                 from /usr/include/asterisk/chanvars.h:26,
                 from /usr/include/asterisk/channel.h:111,
                 from /usr/include/asterisk/file.h:30,
                 from app_nv_faxdetect.c:26:
/usr/include/asterisk/lock.h: In function `ast_mutex_init':
/usr/include/asterisk/lock.h:525: error: `PTHREAD_MUTEX_RECURSIVE' undeclared (first use in this function)
/usr/include/asterisk/lock.h:525: error: (Each undeclared identifier is reported only once
/usr/include/asterisk/lock.h:525: error: for each function it appears in.)
In file included from app_nv_faxdetect.c:26:
/usr/include/asterisk/file.h: At top level:
/usr/include/asterisk/file.h:56: error: syntax error before '*' token
/usr/include/asterisk/file.h:57: error: syntax error before '*' token
make: *** [app_nv_faxdetect.o] Error 1