Compiling 21.3 on IRIX6.5

[John Barry <j.s.barry@larc.nasa.gov>]

Emacs-21.3 was configured with no options (except --prefix).
Compiled with recent versions of gcc, using gmake . It chokes
when compiling movemail.c in the following way:

gmake[1]: Entering directory `/data2/local/emacs-21.3.obj/lib-src'
gcc -c -DHAVE_CONFIG_H -I. -I../src
-I/data2/local/emacs-21.3.src/lib-src
-I/data2/local/emacs-21.3.src/lib-src/../src  -g -O2 -Demacs
/data2/local/emacs-21.3.src/lib-src/movemail.c
In file included from /data2/local/emacs-21.3.src/src/s/usg5-4.h:98,
                 from /data2/local/emacs-21.3.src/src/s/irix5-0.h:1,
                 from /data2/local/emacs-21.3.src/src/s/irix6-5.h:3,
                 from ../src/config.h:371,
                 from /data2/local/emacs-21.3.src/lib-src/movemail.c:59:

/usr/include/sys/stropts.h:237: parse error before "t_uscalar_t"
/usr/include/sys/stropts.h:261: parse error before "t_uscalar_t"
/usr/include/sys/stropts.h:267: parse error before '}' token
gmake[1]: *** [movemail.o] Error 1
gmake[1]: Leaving directory `/data2/local/emacs-21.3.obj/lib-src'
gmake: *** [lib-src] Error 2

This the same problem that showed up with the latest version of
gawk. The parser seems not to know about t_uscalar_t as a data type.
It is defined in sys/types.h. Manually adding #include <sys/types.h>
before #include <sys/stropts> in file usg5-4.h proved fruitless. These
are the first versions of emacs and gawk where this problem has occured.

                                    Thanks for any help,
                                        John Barry