/zaptel.conf\"   -c -o ztcfg.o ztcfg.c
In file included from /usr/include/errno.h:36,
                 from ztcfg.c:39:
/usr/include/bits/errno.h:25:26: linux/errno.h: No such file or directory
In file included from tonezone.h:27,
                 from ztcfg.c:41:
zaptel.h:62:25: linux/ioctl.h: No such file or directory
ztcfg.c: In function `main':
ztcfg.c:789: error: `EINVAL' undeclared (first use in this function)
ztcfg.c:789: error: (Each undeclared identifier is reported only once
ztcfg.c:789: error: for each function it appears in.)
make: *** [ztcfg.o] Error 1