diff -r c3e0c65b7b93 -r 3976adc582fb config/companion_libs/mpfr.in
--- a/config/companion_libs/mpfr.in	Sat Apr 30 14:38:44 2011 +0200
+++ b/config/companion_libs/mpfr.in	Sun Oct 16 14:38:52 2011 +0200
@@ -6,6 +6,11 @@
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config MPFR_V_3_1_0
+    bool
+    prompt "3.1.0 (EXPERIMENTAL)"
+    depends on EXPERIMENTAL
+
 config MPFR_V_3_0_1
     bool
     prompt "3.0.1 (EXPERIMENTAL)"
@@ -43,6 +48,7 @@
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "3.1.0" if MPFR_V_3_1_0
     default "3.0.1" if MPFR_V_3_0_1
     default "3.0.0" if MPFR_V_3_0_0
     default "2.4.2" if MPFR_V_2_4_2