[dns-operations] Compiling ncap on Debian/Linux (Was: "NS .", the attack of the month?

Eduardo A. Suárez esuarez at fcaglp.fcaglp.unlp.edu.ar
Mon Jan 26 18:07:34 UTC 2009


disable building of shared libraries with

./configure --enable-shared=no --disable-shared

I compiled ncap on Debian Lenny x86_64.


Quoting Stephane Bortzmeyer <bortzmeyer at nic.fr>:

> On Sat, Jan 24, 2009 at 10:04:33PM -0500,
>  Robert Edmonds <edmonds at gtisc.gatech.edu> wrote
>  a message of 303 lines which said:
>> ncaptool as of 1.5.0 (see changes attached) supports this directly, e.g.
> Nice, thanks, but ncap does not compile on Debian :
> % make
> make  all-am
> make[1]: Entering directory `/home/stephane/tmp/ncap-1.5.0'
> /bin/sh ./libtool --tag=CC   --mode=link gcc -Wall -Werror -Wunused   
> -Wshadow -Wcast-qual -Wpointer-arith -Wwrite-strings   
> -Wnested-externs -Wmissing-noreturn -Wmissing-prototypes   
> -Wbad-function-cast -Wbad-function-cast -Wformat-nonliteral -Wextra   
> -Wswitch-enum -g -O2  -version-info 43:0:0 /usr/lib/libresolv.a  -o   
> libncap.la -rpath /usr/local/lib ncap_create.lo ncap_dns.lo   
> ncap_icmp.lo ipreasm.lo  -lpcap -ldl -lrt
> *** Warning: Linking the shared library libncap.la against the
> *** static library /usr/lib/libresolv.a is not portable!
> gcc -shared  .libs/ncap_create.o .libs/ncap_dns.o .libs/ncap_icmp.o   
> .libs/ipreasm.o  /usr/lib/libresolv.a -lpcap -ldl -lrt  -Wl,-soname   
> -Wl,libncap.so.43 -o .libs/libncap.so.43.0.0
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/../../../../x86_64-pc-linux-gnu/bin/ld: /usr/lib/libresolv.a(ns_parse.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with   
> -fPIC
> /usr/lib/libresolv.a: could not read symbols: Bad value
> collect2: ld returned 1 exit status
> make[1]: *** [libncap.la] Error 1
> make[1]: Leaving directory `/home/stephane/tmp/ncap-1.5.0'
> make: *** [all] Error 2
> The distribution directory at ISC contains a HOWTO.ncaptool.linux.txt
> which is apparently outdated (it refers to a non-existing
> Makefile.debian).
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Eduardo A. Suarez
Facultad de Ciencias Astronomicas y Geofisicas
Universidad Nacional de La Plata
Tel: (0221)-4236593 int. 158(35)/Cel: (0221)-15-4557542/Casa: (0221)-4526589
"In a world where data is the coin of the realm, and transmissions are guarded
by no better sentinels than man-made codes and corruptible devices, there is
no such thing as a secret." - This Alien Shore

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