The patch is a subset of

    commit b028d3fd33b004ac61583927884a64577e2d64c3
    Author: Bart Oldeman <bartoldeman@users.sourceforge.net>
    Date:   Sun Dec 23 22:08:11 2012 -0500

to fix glibc detection for
Bug: https://bugs.gentoo.org/597880
diff --git a/configure.ac b/configure.ac
index 70bc154..b8da5e2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -644,19 +640,9 @@ if test "$GCC" = "yes" ; then
   fi
 
   AC_MSG_CHECKING(for glibc...)
-  set `printf '%b\n' '#include <features.h>\nXXAaZZ __GLIBC__ XXBbZZ __GLIBC_MINOR__'|${CC-cc} -E -|awk '/XXAaZZ/ {print $2 " " $4}'`
-  major=$1; minor=$2
-  if test "$major" = "__GLIBC__"; then
-    AC_MSG_ERROR([Sorry, you need glibc-2.1.3 or newer.])
-  else
-    if test "$minor" = "__GLIBC_MINOR__"; then
-      minor=0;
-    fi
-    GLIBC_VERSION_CODE=$((($major * 1000) + $minor))
-    AC_MSG_RESULT([yes, version code $GLIBC_VERSION_CODE])
-    if test $GLIBC_VERSION_CODE -lt 2001; then
-      AC_MSG_ERROR([Sorry, you need glibc-2.1.3 or newer.])
-    fi
+  set `printf '%b\n' '#include <features.h>\nXXAaZZ __GLIBC__'|${CC-cc} -E -|awk '/XXAaZZ/ {print $2}'`
+  if test "$1" = "__GLIBC__"; then
+    AC_MSG_ERROR([Sorry, you need glibc.])
   fi
 fi