Merge from gnulib (Bug#26398)

This incorporates:
2017-04-08 getopt: prefer - to _ in new file names
2017-04-08 getopt: port recent getopt changes to macOS
* .gitignore: Add lib/getopt-cdefs.h.
* lib/getopt-cdefs.in.h: Rename from lib/getopt_cdefs.in.h.
* lib/getopt-core.h: Rename from lib/getopt_core.h.
* lib/getopt-ext.h: Rename from lib/getopt_ext.h.
* lib/getopt-pfx-core.h: Rename from lib/getopt_pfx_core.h.
* lib/getopt-pfx-ext.h: Rename from lib/getopt_pfx_ext.h.
* lib/getopt.in.h, lib/unistd.in.h, m4/getopt.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.

2 files changed, 7 insertions, 7 deletions

diff --git a/m4/getopt.m4 b/m4/getopt.m4
index d90076922b2..ac3b38e385e 100644
--- a/m4/getopt.m4
+++ b/m4/getopt.m4
@@ -1,4 +1,4 @@
-# getopt.m4 serial 45
+# getopt.m4 serial 46
 dnl Copyright (C) 2002-2006, 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -364,7 +364,7 @@ AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
     [Define to rpl_ if the getopt replacement functions and variables
      should be used.])
   GETOPT_H=getopt.h
-  GETOPT_CDEFS_H=getopt_cdefs.h
+  GETOPT_CDEFS_H=getopt-cdefs.h
   AC_SUBST([GETOPT_H])
   AC_SUBST([GETOPT_CDEFS_H])
 ])
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index 5aea057c5d5..bfac944ea05 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -899,15 +899,15 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/getdtablesize.c
   lib/getgroups.c
   lib/getloadavg.c
+  lib/getopt-cdefs.in.h
+  lib/getopt-core.h
+  lib/getopt-ext.h
+  lib/getopt-pfx-core.h
+  lib/getopt-pfx-ext.h
   lib/getopt.c
   lib/getopt.in.h
   lib/getopt1.c
-  lib/getopt_cdefs.in.h
-  lib/getopt_core.h
-  lib/getopt_ext.h
   lib/getopt_int.h
-  lib/getopt_pfx_core.h
-  lib/getopt_pfx_ext.h
   lib/gettext.h
   lib/gettime.c
   lib/gettimeofday.c