compiling packages

Hi ,
I'm having trouble compiling anything under pkgsrc.  I've read the README
and run ./bootstrap.sh and that went OK.   When I tried to build hplip I
get an error

n file included from c-stack.c:49:0:
./signal.h:766:8: error: redefinition of 'struct sigaction'
 struct sigaction
        ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:125:8: note: originally defined here
 struct sigaction {
        ^
In file included from c-stack.c:49:0:
./signal.h:781:0: warning: "sa_handler" redefined [enabled by default]
 #   define sa_handler _sa_func._sa_handler
 ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:137:0: note: this is the location of the previous
definition
 #define sa_handler _sa_u._sa_handler
 ^
In file included from c-stack.c:49:0:
./signal.h:782:0: warning: "sa_sigaction" redefined [enabled by default]
 #   define sa_sigaction _sa_func._sa_sigaction
 ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:140:0: note: this is the location of the previous
definition
 #define sa_sigaction _sa_u._sa_sigaction
 ^
In file included from c-stack.c:49:0:
./signal.h:784:0: warning: "SA_RESETHAND" redefined [enabled by default]
 #   define SA_RESETHAND 1
 ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:149:0: note: this is the location of the previous
definition
 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
 ^
In file included from c-stack.c:49:0:
./signal.h:785:0: warning: "SA_NODEFER" redefined [enabled by default]
 #   define SA_NODEFER 2
 ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:150:0: note: this is the location of the previous
definition
 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
 ^
In file included from c-stack.c:49:0:
./signal.h:786:0: warning: "SA_RESTART" redefined [enabled by default]
 #   define SA_RESTART 4
 ^
In file included from ///usr/include/signal.h:45:0,
                 from ./signal.h:52,
                 from c-stack.c:49:
/usr/include/sys/signal.h:148:0: note: this is the location of the previous
definition
 #define SA_RESTART 0x0002 /* restart system call on signal return */
 ^
In file included from ./string.h:68:0,
                 from gettext.h:184,
                 from c-stack.c:44:
./signal.h:791:19: error: conflicting types for 'sigaction'
 _GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
                   ^
./unistd.h:246:24: note: in definition of macro '_GL_FUNCDECL_SYS'
   _GL_EXTERN_C rettype func parameters_and_attributes
                        ^
In file included from ./signal.h:52:0,
                 from c-stack.c:49:
///usr/include/signal.h:78:5: note: previous declaration of 'sigaction' was
here
 int sigaction(int, const struct sigaction * __restrict,
     ^

I got similar when I tried to compile xfig.

Any ideas?

Glenn.