>From 7cfff1726cc06ea29bb39788f27ccfd5088e7310 Mon Sep 17 00:00:00 2001
From: Bruno Haible <address@hidden>
Date: Thu, 13 Jul 2017 19:49:38 +0200
Subject: [PATCH 4/4] Revisit cross-compilation guesses.

* m4/wctype_h.m4 (gl_WCTYPE_H): Add comment.
---
 ChangeLog      | 5 +++++
 m4/wctype_h.m4 | 5 +++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ca4730b..20cb4a0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2017-07-13  Bruno Haible  <address@hidden>
 
+	Revisit cross-compilation guesses.
+	* m4/wctype_h.m4 (gl_WCTYPE_H): Add comment.
+
+2017-07-13  Bruno Haible  <address@hidden>
+
 	Improve cross-compilation guesses for native Windows.
 	* m4/btowc.m4 (gl_FUNC_BTOWC): Add cross-compilation guess for native
 	Windows.
diff --git a/m4/wctype_h.m4 b/m4/wctype_h.m4
index 0c8c305..596f26b 100644
--- a/m4/wctype_h.m4
+++ b/m4/wctype_h.m4
@@ -1,4 +1,4 @@
-# wctype_h.m4 serial 20
+# wctype_h.m4 serial 21
 
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
 
@@ -53,7 +53,8 @@ AC_DEFUN([gl_WCTYPE_H],
                int main () { return iswprint ('x') == 0; }
             ]])],
             [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
-            [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
+            [dnl Guess no on Linux libc5, yes otherwise.
+             AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
                           #if __GNU_LIBRARY__ == 1
                           Linux libc5 i18n is broken.
                           #endif]], [])],
-- 
2.7.4