diff -r fab0b8a61dcb -r 5a49f274ab2d gl/m4/gnulib-cache.m4
--- a/gl/m4/gnulib-cache.m4	Wed Aug 20 18:57:52 2014 +0100
+++ b/gl/m4/gnulib-cache.m4	Tue Jun 05 11:07:53 2018 +0100
@@ -27,7 +27,7 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=. --no-conditional-dependencies --libtool --macro-prefix=gl fnmatch fnmatch-posix fsync mkdir mkdtemp
+#   gnulib-tool --import --dir=. --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=tests --aux-dir=. --no-conditional-dependencies --libtool --macro-prefix=gl fnmatch fnmatch-posix fsync getopt-gnu mkdir mkdtemp
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([])
@@ -35,6 +35,7 @@
   fnmatch
   fnmatch-posix
   fsync
+  getopt-gnu
   mkdir
   mkdtemp
 ])