Ошибочный htk-инструмент установки

Когда я пытаюсь скомпилировать и установить HTK, он производит следующую ошибку:

HTK is now ready to be built.

Type "make all" to build the HTK libraries
and tools.

Then "make install" to install them.

The tools will be installed in /usr/local/bin

Build notes: Language Modelling tools will be
built. HDecode will not be built. You can build
it manually later by running 'make hdecode
install-hdecode'

**************************************************
user@EESBLRP105:~/htk$  make all

(cd HTKLib && make HTKLib.a) \
      || case "" in *k*) fail=yes;; *) exit 1;; esac;
make[1]: Entering directory `/home/user/htk/HTKLib'
gcc  -m32 -ansi -D_SVID_SOURCE -DOSS_AUDIO -D'ARCH="x86_64"' -Wall -Wno-switch -g -O2 -I. -DPHNALG   -c -o HGraf.o HGraf.c
In file included from /usr/include/stdio.h:27:0,
                 from HShell.h:40,
                 from HGraf.c:54:
/usr/include/features.h:374:25: fatal error: sys/cdefs.h: No such file or directory
 #  include <sys/cdefs.h>
                         ^
compilation terminated.
make[1]: *** [HGraf.o] Error 1
make[1]: Leaving directory `/home/user/htk/HTKLib'
make: *** [HTKLib/HTKLib.a] Error 1