diff --git a/configure.in b/configure.in
index 15e350a87dbef9bd978ca296259da0b373d8fb05..97acf325ae55d0091ce65e026722fc8248656b3d 100644
--- a/configure.in
+++ b/configure.in
@@ -450,16 +450,6 @@ AC_TYPE_TIMEZONE
 dnl do we have altzone?
 AC_ALTZONE
 
-#
-dnl do we have the GNU libc?
-AC_GNU_LIBC
-
-#
-dnl define uint, ulong and ullong if not already defined
-AC_CHECK_TYPE(uint,unsigned int)
-AC_CHECK_TYPE(ulong,unsigned long)
-AC_CHECK_TYPE(ullong,unsigned long long)
-
 #
 dnl ** check for specific library functions that we are interested in
 #