SunOS 4.1.4 "configure: WARNING" for sys/audit.h and sys/dir.h

Openssh: openssh-SNAP-20060626 and openssh-4.3p2
System: SunOS 4.1.4
Compiler: gcc 2.8.1

CONFIGURE PROBLEM:
The warnings included below occur because of missing include files for each
compilation test.

Specifically:
sys/audit.h needs sys/types.h and sys/label.h
sys/dir.h needs sys/types.h


PARTIAL FIX:

Most of the machinery for the sys/types.h dependency is already present.
One possibility is to add the line "AC_DEFINE(HAVE_SYS_TYPES_H)" to
"configure.ac" as follows for openssh-SNAP-20060626/configure.ac:

429 *-*-sunos4*)
430 CPPFLAGS="$CPPFLAGS -DSUNOS4"
431 AC_CHECK_FUNCS(getpwanam)
432 AC_DEFINE(PAM_SUN_CODEBASE)
+ add this + AC_DEFINE(HAVE_SYS_TYPES_H)
433 conf_utmp_location=/etc/utmp
434 conf_wtmp_location=/var/adm/wtmp
435 conf_lastlog_location=/var/adm/lastlog
436 AC_DEFINE(USE_PIPES)
437 ;;

However, the sys/label.h dependency would take a bit more and I'm
in no hurry to trip over sys/audit.h and sys/labels.h anyway...
Hey - I know SunOS4.1.4 is busted - but it still works for me :)

CONFIGURE WARNINGS:

checking sys/audit.h usability... no
checking sys/audit.h presence... yes
configure: WARNING: sys/audit.h: present but cannot be compiled
configure: WARNING: sys/audit.h: check for missing prerequisite headers?
configure: WARNING: sys/audit.h: see the Autoconf documentation
configure: WARNING: sys/audit.h: section "Present But Cannot Be Compiled"
configure: WARNING: sys/audit.h: proceeding with the preprocessor's result
configure: WARNING: sys/audit.h: in the future, the compiler will take precedence
configure: WARNING: ## ------------------------------------------- ##
configure: WARNING: ## Report this to openssh-unix-dev@mindrot.org ##
configure: WARNING: ## ------------------------------------------- ##
checking for sys/audit.h... yes
....
checking sys/dir.h usability... no
checking sys/dir.h presence... yes
configure: WARNING: sys/dir.h: present but cannot be compiled
configure: WARNING: sys/dir.h: check for missing prerequisite headers?
configure: WARNING: sys/dir.h: see the Autoconf documentation
configure: WARNING: sys/dir.h: section "Present But Cannot Be Compiled"
configure: WARNING: sys/dir.h: proceeding with the preprocessor's result
configure: WARNING: sys/dir.h: in the future, the compiler will take precedence
configure: WARNING: ## ------------------------------------------- ##
configure: WARNING: ## Report this to openssh-unix-dev@mindrot.org ##
configure: WARNING: ## ------------------------------------------- ##
checking for sys/dir.h... yes



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