Use gnulib module 'strerror'.
diff --git a/ChangeLog b/ChangeLog
index aea1bde..4748bf0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2008-09-14  Bruno Haible  <bruno@clisp.org>
+
+	* Makefile.devel (GNULIB_MODULES): Add strerror.
+
 2008-09-07  Bruno Haible  <bruno@clisp.org>
 
 	Make behaviour when encountering invalid input after a shift sequence
diff --git a/Makefile.devel b/Makefile.devel
index deef3ab..d23220b 100644
--- a/Makefile.devel
+++ b/Makefile.devel
@@ -74,6 +74,7 @@
   memmove \
   progname \
   relocatable-prog \
+  strerror \
   unistd \
   uniwidth/width \
   unlocked-io \