vsnprintf chokes "make check" on HPUX

On HP-UX 10.20, with either HP's aCC compiler or with the GNU gcc
compiler, the dejagnu.h file's use of vsnprintf chokes the compiler
during the "make check" phase of building (dejagnu 1.4.4).

aCC -AA +DAportable (version A.01.27) complains like this:

Error 403: "../../dejagnu.h", line 68 # Undeclared variable 'vsnprintf'.
    Perhaps 'vsprintf' as in "int vsprintf(char *,const char *,double
*)"
    ["/usr/include/stdio.h", line 422] was intended.
            vsnprintf( buffer, _BUFFER_SIZE_, fmt, ap );
            ^^^^^^^^^
Error 403: "../../dejagnu.h", line 82 # Undeclared variable 'vsnprintf'.
    Perhaps 'vsprintf' as in "int vsprintf(char *,const char *,double
*)"
    ["/usr/include/stdio.h", line 422] was intended.
            vsnprintf( buffer, _BUFFER_SIZE_, fmt, ap );
            ^^^^^^^^^
Error 403: "../../dejagnu.h", line 96 # Undeclared variable 'vsnprintf'.
    Perhaps 'vsprintf' as in "int vsprintf(char *,const char *,double
*)"
    ["/usr/include/stdio.h", line 422] was intended.
            vsnprintf( buffer, _BUFFER_SIZE_, fmt, ap );
            ^^^^^^^^^
Error 403: "../../dejagnu.h", line 110 # Undeclared variable
'vsnprintf'.
    Perhaps 'vsprintf' as in "int vsprintf(char *,const char *,double
*)"
    ["/usr/include/stdio.h", line 422] was intended.
            vsnprintf( buffer, _BUFFER_SIZE_, fmt, ap );
            ^^^^^^^^^
Error 403: "../../dejagnu.h", line 123 # Undeclared variable
'vsnprintf'.
    Perhaps 'vsprintf' as in "int vsprintf(char *,const char *,double
*)"
    ["/usr/include/stdio.h", line 422] was intended.
            vsnprintf( buffer, _BUFFER_SIZE_, fmt, ap );
            ^^^^^^^^^
Error 182: "unit.cc", line 56 # "int main(int,char **)" cannot access
    protected member "std::basic_streambuf<char,std::char_traits<char> >
    *std::basic_streambuf<char,std::char_traits<char> >::setbuf(char
*,int)".
        cout.rdbuf()->setbuf(bbuuff, 5120);
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
make[4]: *** [unit.o] Error 2

Complaints from gcc (version 3.3.2) look like this:

In file included from unit.cc:9:
../../dejagnu.h: In function `void pass(const char*, ...)':
../../dejagnu.h:68: error: `vsnprintf' undeclared (first use this
function)
../../dejagnu.h:68: error: (Each undeclared identifier is reported only
once
   for each function it appears in.)
../../dejagnu.h: In function `void fail(const char*, ...)':
../../dejagnu.h:82: error: `vsnprintf' undeclared (first use this
function)
../../dejagnu.h: In function `void untested(const char*, ...)':
../../dejagnu.h:96: error: `vsnprintf' undeclared (first use this
function)
../../dejagnu.h: In function `void unresolved(const char*, ...)':
../../dejagnu.h:110: error: `vsnprintf' undeclared (first use this
function)
../../dejagnu.h: In function `void note(const char*, ...)':
../../dejagnu.h:123: error: `vsnprintf' undeclared (first use this
function)
make[4]: *** [unit.o] Error 1

The config logs for both configurations are attached.  Thanks for any
feedback or assistance you can provide!  Regards,

--Chris--

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