Issue #20306: The pw_gecos and pw_passwd fields are not required by POSIX.
If they aren't present, set them to an empty string.
diff --git a/configure b/configure
index ee8a8fc..a961f39 100755
--- a/configure
+++ b/configure
@@ -12918,6 +12918,33 @@
fi
+ac_fn_c_check_member "$LINENO" "struct passwd" "pw_gecos" "ac_cv_member_struct_passwd_pw_gecos" "
+ #include <sys/types.h>
+ #include <pwd.h>
+
+"
+if test "x$ac_cv_member_struct_passwd_pw_gecos" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_PASSWD_PW_GECOS 1
+_ACEOF
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct passwd" "pw_passwd" "ac_cv_member_struct_passwd_pw_passwd" "
+ #include <sys/types.h>
+ #include <pwd.h>
+
+"
+if test "x$ac_cv_member_struct_passwd_pw_passwd" = xyes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_PASSWD_PW_PASSWD 1
+_ACEOF
+
+
+fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for time.h that defines altzone" >&5
$as_echo_n "checking for time.h that defines altzone... " >&6; }