[ns] Error by installing NS-2.1b7a (allinone)

[Hoang Dang Hai <Hai.Hoang@prakinf.tu-ilmenau.de>]

Hi all,

could YOU show me what is the reason of following error messages
by installing ns-allinone-2.1b7a?

Thank you very much in advance!
dears,
hoang@prakinf.tu-ilmenau.de (technical university of ilmenau)

{
...
In file included from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/time.h:90,
                 from /usr/include/sys/time.h:405,
                 from /usr/include/sys/select.h:17,
                 from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/sys/types.h:278,
                 from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/pwd.h:15,
                 from xgraph.c:30:
/usr/include/sys/siginfo.h:74: parse error before `pthread_attr_t'
/usr/include/sys/siginfo.h:74: warning: no semicolon at end of struct or
union
/usr/include/sys/siginfo.h:76: parse error before `}'
make: *** [xgraph.o] Error 1

...

gcc  -I../include -L../lib  -DFBSD   -c itm.c 
In file included from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/time.h:90,
                 from /usr/include/sys/time.h:405,
                 from /usr/include/sys/select.h:17,
                 from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/sys/types.h:278,
                 from itm.c:41:
/usr/include/sys/siginfo.h:74: parse error before `pthread_attr_t'
/usr/include/sys/siginfo.h:74: warning: no semicolon at end of struct or
union
/usr/include/sys/siginfo.h:76: parse error before `}'
make: *** [itm.o] Error 1
gcc  -I../include -L../lib    -c sgb2comns.c 
In file included from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/time.h:90,
                 from /usr/include/sys/time.h:405,
                 from /usr/include/sys/select.h:17,
                 from
/usr/local/gnu/lib/gcc-lib/sparc-sun-solaris2.5.1/2.7.2.2/include/sys/types.h:278,
                 from /usr/include/strings.h:11,
                 from sgb2comns.c:38:
/usr/include/sys/siginfo.h:74: parse error before `pthread_attr_t'
/usr/include/sys/siginfo.h:74: warning: no semicolon at end of struct or
union
/usr/include/sys/siginfo.h:76: parse error before `}'
make: *** [sgb2comns.o] Error 1

}