nnd 0.2.4 [http://nnd-linux.internetdsl.pl/nnd/iso/]
kernel 2.4.35-2nnd
iptables 1.3.4

make
make -C src
make[1]: Wejście do katalogu `/root/nc/src'
g++ -Wall -Wextra -ansi -pedantic -I../include -c aux.cc
aux.cc: In function ‘int aux::split_ip(std::string, std::string&, std::string&)’:
aux.cc:236:35: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
g++ -Wall -Wextra -ansi -pedantic -I../include -c class.cc
class.cc: In member function ‘int NsClass::store(std::string)’:
class.cc:95:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
g++ -Wall -Wextra -ansi -pedantic -I../include -c niceshaper.cc
g++ -Wall -Wextra -ansi -pedantic -I../include -c conv.cc
g++ -Wall -Wextra -ansi -pedantic -I../include -c filter.cc
g++ -Wall -Wextra -ansi -pedantic -I../include -c instance.cc
instance.cc: In constructor ‘Instance::Instance(bool&)’:
instance.cc:33:13: error: ‘pipe’ was not declared in this scope
instance.cc:36:21: error: ‘fork’ was not declared in this scope
instance.cc:38:22: error: ‘close’ was not declared in this scope
instance.cc:49:22: error: ‘getpid’ was not declared in this scope
instance.cc:50:22: error: ‘close’ was not declared in this scope
instance.cc: In destructor ‘Instance::~Instance()’:
instance.cc:63:20: error: ‘close’ was not declared in this scope
make[1]: *** [instance.o] Błąd 1
make[1]: Opuszczenie katalogu `/root/nc/src'
make: *** [all] Błąd 2

to gcc w wersji 4.7 jest powodem tego problemu , tutaj trochę więcej info:
https://bugs.launchpad.net/widelands/+bug/976551

jako rozwiązanie tymczasowe proponuję dodanie do pliku src/main.h za liniami:

KOD: ZAZNACZ CAŁY
#include <string>
#include <vector>


linii:
KOD: ZAZNACZ CAŁY
#include <unistd.h>

W NND jest znacznie wcześniejsze gcc i niestety ta rada nie pomogła.