Do not use Gnulib’s m4/wint_t.m4.

* admin/merge-gnulib: Remove m4/wint_t.m4 when merging.
Fix typo so that warn-on-use.m4 is removed too.
* configure.ac (gt_TYPE_WINT_T): New macro, replacing Gnulib’s.
* m4/wint_t.m4: Remove.

3 files changed, 5 insertions, 63 deletions

diff --git a/admin/merge-gnulib b/admin/merge-gnulib
index 69db30cc41e..20a3240ea89 100755
--- a/admin/merge-gnulib
+++ b/admin/merge-gnulib
@@ -96,7 +96,7 @@ test -x "$gnulib_srcdir"/gnulib-tool || {
 "$gnulib_srcdir"/gnulib-tool --dir="$src" $GNULIB_TOOL_FLAGS $GNULIB_MODULES &&
 rm -- "$src"lib/gl_openssl.h "$src"m4/fcntl-o.m4 \
       "$src"m4/gl-openssl.m4 \
-      "$src"m4/gnulib-cache.m4"$src" m4/warn-on-use.m4 &&
+      "$src"m4/gnulib-cache.m4 "$src"m4/warn-on-use.m4 "$src"m4/wint_t.m4 &&
 cp -- "$gnulib_srcdir"/build-aux/texinfo.tex "$src"doc/misc &&
 cp -- "$gnulib_srcdir"/build-aux/move-if-change "$src"build-aux &&
 { test -z "$src" || cd "$src"; } &&
diff --git a/configure.ac b/configure.ac
index 642cf7b37a9..ce386f6c6c8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -792,6 +792,10 @@ ac_func_list=$funcs
 AC_CHECK_FUNCS_ONCE([putenv])
 AC_DEFUN([gl_FUNC_PUTENV],
   [test "$ac_cv_func_putenv" = yes || REPLACE_PUTENV=1])
+# Emacs does not use the wchar or wctype-h modules.
+AC_DEFUN([gt_TYPE_WINT_T],
+  [GNULIB_OVERRIDES_WINT_T=0
+   AC_SUBST([GNULIB_OVERRIDES_WINT_T])])
 
 # Initialize gnulib right after choosing the compiler.
 dnl Amongst other things, this sets AR and ARFLAGS.
diff --git a/m4/wint_t.m4 b/m4/wint_t.m4
deleted file mode 100644
index 65e25a4c38a..00000000000
--- a/m4/wint_t.m4
+++ /dev/null
@@ -1,62 +0,0 @@
-# wint_t.m4 serial 6
-dnl Copyright (C) 2003, 2007-2017 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Bruno Haible.
-dnl Test whether <wchar.h> has the 'wint_t' type and whether gnulib's
-dnl <wchar.h> or <wctype.h> would, if present, override 'wint_t'.
-dnl Prerequisite: AC_PROG_CC
-
-AC_DEFUN([gt_TYPE_WINT_T],
-[
-  AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t],
-    [AC_COMPILE_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
-   <wchar.h>.
-   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
-   before <wchar.h>.  */
-#include <stddef.h>
-#include <stdio.h>
-#include <time.h>
-#include <wchar.h>
-            wint_t foo = (wchar_t)'\0';]],
-          [[]])],
-       [gt_cv_c_wint_t=yes],
-       [gt_cv_c_wint_t=no])])
-  if test $gt_cv_c_wint_t = yes; then
-    AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.])
-
-    dnl Determine whether gnulib's <wchar.h> or <wctype.h> would, if present,
-    dnl override 'wint_t'.
-    AC_CACHE_CHECK([whether wint_t is too small],
-      [gl_cv_type_wint_t_too_small],
-      [AC_COMPILE_IFELSE(
-           [AC_LANG_PROGRAM([[
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
-   <wchar.h>.
-   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
-   included before <wchar.h>.  */
-#if !(defined __GLIBC__ && !defined __UCLIBC__)
-# include <stddef.h>
-# include <stdio.h>
-# include <time.h>
-#endif
-#include <wchar.h>
-              int verify[sizeof (wint_t) < sizeof (int) ? -1 : 1];
-              ]])],
-           [gl_cv_type_wint_t_too_small=no],
-           [gl_cv_type_wint_t_too_small=yes])])
-    if test $gl_cv_type_wint_t_too_small = yes; then
-      GNULIB_OVERRIDES_WINT_T=1
-    else
-      GNULIB_OVERRIDES_WINT_T=0
-    fi
-  else
-    GNULIB_OVERRIDES_WINT_T=0
-  fi
-  AC_SUBST([GNULIB_OVERRIDES_WINT_T])
-])