1 files changed, 24 insertions, 0 deletions
diff --git a/ext/etc/extconf.rb b/ext/etc/extconf.rb
index 884de93ec8..4cf04a3ec3 100644
--- a/ext/etc/extconf.rb
+++ b/ext/etc/extconf.rb
@@ -1,7 +1,31 @@
+require 'mkmf'
+
+def etc_grep_header(field)
+  f = open("conftest.c", "w")
+  f.print <<EOF
+#include <pwd.h>
+EOF
+  f.close
+  begin
+    if xsystem("#{CPP} | egrep #{field}")
+      $defs.push(format("-D%s", field.upcase))
+    end
+  ensure
+    system "rm -f conftest.c"
+  end
+end
+
 have_library("sun", "getpwnam")	# NIS (== YP) interface for IRIX 4
 a = have_func("getlogin")
 b = have_func("getpwent")
 c = have_func("getgrent")
 if  a or b or c
+  etc_grep_header("pw_gecos")
+  etc_grep_header("pw_change")
+  etc_grep_header("pw_quota")
+  etc_grep_header("pw_age")
+  etc_grep_header("pw_class")
+  etc_grep_header("pw_comment")
+  etc_grep_header("pw_expire")
   create_makefile("etc")
 end