Switch to autoconf 2.66.
diff --git a/ChangeLog b/ChangeLog
index 8991d54..f1f0428 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-03  Bruno Haible  <bruno@clisp.org>
+
+	* Makefile.devel (AUTOCONF, AUTOHEADER): Switch to version 2.66.
+	* preload/Makefile.devel (AUTOCONF): Likewise.
+
 2010-06-04  Bruno Haible  <bruno@clisp.org>
 
 	Addendum to 2009-10-18 commit.
diff --git a/Makefile.devel b/Makefile.devel
index 419858f..70096a3 100644
--- a/Makefile.devel
+++ b/Makefile.devel
@@ -4,8 +4,8 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.65
-AUTOHEADER = autoheader-2.65
+AUTOCONF = autoconf-2.66
+AUTOHEADER = autoheader-2.66
 AUTOMAKE = automake-1.11
 ACLOCAL = aclocal-1.11
 GPERF = gperf
diff --git a/libcharset/ChangeLog b/libcharset/ChangeLog
index f168fb2..408bc76 100644
--- a/libcharset/ChangeLog
+++ b/libcharset/ChangeLog
@@ -1,3 +1,7 @@
+2010-07-03  Bruno Haible  <bruno@clisp.org>
+
+	* Makefile.devel (AUTOCONF, AUTOHEADER): Switch to version 2.66.
+
 2010-06-04  Bruno Haible  <bruno@clisp.org>
 
 	Addendum to 2009-10-18 commit.
diff --git a/libcharset/Makefile.devel b/libcharset/Makefile.devel
index b3a852d..002ffd6 100644
--- a/libcharset/Makefile.devel
+++ b/libcharset/Makefile.devel
@@ -3,8 +3,8 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.65
-AUTOHEADER = autoheader-2.65
+AUTOCONF = autoconf-2.66
+AUTOHEADER = autoheader-2.66
 ACLOCAL = aclocal-1.11
 CP = cp
 RM = rm -f
diff --git a/preload/Makefile.devel b/preload/Makefile.devel
index a623460..e4c7591 100644
--- a/preload/Makefile.devel
+++ b/preload/Makefile.devel
@@ -3,7 +3,7 @@
 
 SHELL = /bin/sh
 MAKE = make
-AUTOCONF = autoconf-2.65
+AUTOCONF = autoconf-2.66
 ACLOCAL = aclocal-1.11
 CP = cp
 RM = rm -f