Support Kerberos on platforms where libcom_err depends on OpenSSL, as

reportedly is true on OpenBSD.  Also support OpenBSD's spelling of
-Wl,--as-needed.  Per Simon Bertrang.

configure

@@ -8252,7 +8252,8 @@ return com_err ();
   return 0;
 }
 _ACEOF
-for ac_lib in '' krb5 'krb5 -lcrypto -ldes -lasn1 -lroken' com_err; do
+for ac_lib in '' krb5 'krb5 -lcrypto -ldes -lasn1 -lroken'
+                              com_err 'com_err -lssl -lcrypto'; do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
@@ -27133,9 +27134,10 @@ echo "$as_me: WARNING: *** skipping thread test on Win32" >&2;}
 fi
 fi
 
-# If compiler will take -Wl,--as-needed then add that to LDFLAGS.
-# This is much easier than trying to filter LIBS to the minimum for each
-# executable.  (Note that shared library links won't use this switch, though.)
+# If compiler will take -Wl,--as-needed (or various platform-specific
+# spellings thereof) then add that to LDFLAGS.  This is much easier than
+# trying to filter LIBS to the minimum for each executable.
+# (Note that shared library links won't use this switch, though.)
 # On (at least) some Red-Hat-derived systems, this switch breaks linking to
 # libreadline; therefore we postpone testing it until we know what library
 # dependencies readline has.  The test code will try to link with $LIBS.
@@ -27144,11 +27146,12 @@ if test "$with_readline" = yes; then
 else
   link_test_func=exit
 fi
-if test "$PORTNAME" != "darwin"; then
-  { echo "$as_me:$LINENO: checking if $CC supports -Wl,--as-needed" >&5
-echo $ECHO_N "checking if $CC supports -Wl,--as-needed... $ECHO_C" >&6; }
+
+if test "$PORTNAME" = "darwin"; then
+  { echo "$as_me:$LINENO: checking if $CC supports -Wl,-dead_strip_dylibs" >&5
+echo $ECHO_N "checking if $CC supports -Wl,-dead_strip_dylibs... $ECHO_C" >&6; }
 pgac_save_LDFLAGS=$LDFLAGS
-LDFLAGS="$pgac_save_LDFLAGS -Wl,--as-needed"
+LDFLAGS="$pgac_save_LDFLAGS -Wl,-dead_strip_dylibs"
 if test "$cross_compiling" = yes; then
   LDFLAGS="$pgac_save_LDFLAGS"
                { echo "$as_me:$LINENO: result: assuming no" >&5
@@ -27206,12 +27209,73 @@ fi
 
 
 
+elif test "$PORTNAME" = "openbsd"; then
+  { echo "$as_me:$LINENO: checking if $CC supports -Wl,-Bdynamic" >&5
+echo $ECHO_N "checking if $CC supports -Wl,-Bdynamic... $ECHO_C" >&6; }
+pgac_save_LDFLAGS=$LDFLAGS
+LDFLAGS="$pgac_save_LDFLAGS -Wl,-Bdynamic"
+if test "$cross_compiling" = yes; then
+  LDFLAGS="$pgac_save_LDFLAGS"
+               { echo "$as_me:$LINENO: result: assuming no" >&5
+echo "${ECHO_T}assuming no" >&6; }
 else
-  # On Darwin it's spelled -Wl,-dead_strip_dylibs, but don't try that elsewhere
-  { echo "$as_me:$LINENO: checking if $CC supports -Wl,-dead_strip_dylibs" >&5
-echo $ECHO_N "checking if $CC supports -Wl,-dead_strip_dylibs... $ECHO_C" >&6; }
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+extern void $link_test_func (); void (*fptr) () = $link_test_func;
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+LDFLAGS="$pgac_save_LDFLAGS"
+               { echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+
+else
+  { echo "$as_me:$LINENO: checking if $CC supports -Wl,--as-needed" >&5
+echo $ECHO_N "checking if $CC supports -Wl,--as-needed... $ECHO_C" >&6; }
 pgac_save_LDFLAGS=$LDFLAGS
-LDFLAGS="$pgac_save_LDFLAGS -Wl,-dead_strip_dylibs"
+LDFLAGS="$pgac_save_LDFLAGS -Wl,--as-needed"
 if test "$cross_compiling" = yes; then
   LDFLAGS="$pgac_save_LDFLAGS"
                { echo "$as_me:$LINENO: result: assuming no" >&5

configure.in

 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.597 2009/05/19 22:32:41 petere Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.598 2009/06/10 21:24:10 tgl Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -913,7 +913,8 @@ fi
 
 if test "$with_krb5" = yes ; then
   if test "$PORTNAME" != "win32"; then
-     AC_SEARCH_LIBS(com_err, [krb5 'krb5 -lcrypto -ldes -lasn1 -lroken' com_err], [],
+     AC_SEARCH_LIBS(com_err, [krb5 'krb5 -lcrypto -ldes -lasn1 -lroken'
+                              com_err 'com_err -lssl -lcrypto'], [],
                     [AC_MSG_ERROR([could not find function 'com_err' required for Kerberos 5])])
      AC_SEARCH_LIBS(krb5_sendauth, [krb5 'krb5 -lcrypto -ldes -lasn1 -lroken'], [],
                     [AC_MSG_ERROR([could not find function 'krb5_sendauth' required for Kerberos 5])])
@@ -1777,9 +1778,10 @@ AC_MSG_WARN([*** skipping thread test on Win32])
 fi
 fi
 
-# If compiler will take -Wl,--as-needed then add that to LDFLAGS.
-# This is much easier than trying to filter LIBS to the minimum for each
-# executable.  (Note that shared library links won't use this switch, though.)
+# If compiler will take -Wl,--as-needed (or various platform-specific
+# spellings thereof) then add that to LDFLAGS.  This is much easier than
+# trying to filter LIBS to the minimum for each executable.
+# (Note that shared library links won't use this switch, though.)
 # On (at least) some Red-Hat-derived systems, this switch breaks linking to
 # libreadline; therefore we postpone testing it until we know what library
 # dependencies readline has.  The test code will try to link with $LIBS.
@@ -1788,11 +1790,13 @@ if test "$with_readline" = yes; then
 else
   link_test_func=exit
 fi
-if test "$PORTNAME" != "darwin"; then
-  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,--as-needed], $link_test_func)
-else
-  # On Darwin it's spelled -Wl,-dead_strip_dylibs, but don't try that elsewhere
+
+if test "$PORTNAME" = "darwin"; then
   PGAC_PROG_CC_LDFLAGS_OPT([-Wl,-dead_strip_dylibs], $link_test_func)
+elif test "$PORTNAME" = "openbsd"; then
+  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,-Bdynamic], $link_test_func)
+else
+  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,--as-needed], $link_test_func)
 fi