hello! i have slack 10.1 and i am trying to compile httrack 3.33 and i get this
error:

In file included from htsweb.c:64:
htsmd5.c: In function `md5sum32':
htsmd5.c:90: warning: unused variable `md5digest_'
htsweb.c: At top level:
htsstrings.h:61: warning: `StringBuffN_' defined but not used
htsstrings.h:90: warning: `StringAcquire' defined but not used
htsstrings.h:116: warning: `unescapehttp' defined but not used
htsserver.h:97: warning: `htslang_load' declared `static' but never defined
htsserver.h:98: warning: `conv_printf' declared `static' but never defined
htsserver.h:99: warning: `LANG_DELETE' declared `static' but never defined
htsserver.h:100: warning: `LANG_INIT' declared `static' but never defined
htsserver.h:101: warning: `LANG_T' declared `static' but never defined
htsserver.h:102: warning: `QLANG_T' declared `static' but never defined
htsserver.h:103: warning: `LANGSEL' declared `static' but never defined
htsserver.h:104: warning: `LANGINTKEY' declared `static' but never defined
htsserver.h:105: warning: `LANG_SEARCH' declared `static' but never defined
htsserver.h:106: warning: `LANG_LIST' declared `static' but never defined
htsserver.h:121: warning: `gethomedir' defined but not used
htsserver.h:128: warning: `linput_cpp' defined but not used
htsserver.h:148: warning: `concat' defined but not used
htsserver.h:159: warning: `fexist' defined but not used
htslib.h:238: warning: `linputsoc_t' declared `static' but never defined
htsserver.h:215: warning: `unescapeini' defined but not used
htslib.h:405: warning: `strcmpnocase' defined but not used
htslib.h:446: warning: `is_hypertext_mime' defined but not used
htslib.h:459: warning: `may_be_hypertext_mime' defined but not used
htslib.h:472: warning: `compare_mime' defined but not used
htscore.h:199: warning: `cache_writable' defined but not used
htscore.h:203: warning: `cache_readable' defined but not used
/bin/sh ../libtool --mode=link gcc  -g -O2  -L/usr/lib -o htsserver 
htsserver.o htsweb.o -lpthread  -lhttrack -lz
gcc -g -O2 -o htsserver htsserver.o htsweb.o  -L/usr/lib
/usr/lib/libhttrack.so -lpthread -ldl -lz
htsserver.o(.text+0x6094): In function `smallserver':
/packages/compiled/httrack-3.33.16/src/htsserver.c:906: undefined reference to
`hts_getcategories'
htsserver.o(.text+0x60a0):/packages/compiled/httrack-3.33.16/src/htsserver.c:907:
undefined reference to `hts_getcategories'
htsweb.o(.text+0x2bd8): In function `main':
/packages/compiled/httrack-3.33.16/src/htsweb.c:203: undefined reference to
`htsthread_wait'
htsweb.o(.text+0x2dc5): In function `webhttrack_main':
/packages/compiled/httrack-3.33.16/src/htsweb.c:271: undefined reference to
`hts_newthread'
htsweb.o(.text+0x2f3b): In function `webhttrack_runmain':
/packages/compiled/httrack-3.33.16/src/htsweb.c:301: undefined reference to
`htsthread_wait_n'
collect2: ld returned 1 exit status
make[2]: *** [htsserver] Error 1
make[2]: Leaving directory `/packages/compiled/httrack-3.33.16/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/packages/compiled/httrack-3.33.16'
make: *** [all] Error 2

any help with this? thanks