sitecsp@acl-pg-06:~/HTK/htk$ make all

(cd HTKLib && make HTKLib.a) \

 || case "" in *k*) fail=yes;; *) exit 1;; esac;

make[1]: Entering directory `/home/sitecsp/HTK/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/sitecsp/HTK/htk/HTKLib'

make: *** [HTKLib/HTKLib.a] Error 1