maint.mk: adjust variable name to be consistent with other gl_ vars

[pspp] / m4 / wctype_h.m4

diff --git a/m4/wctype_h.m4 b/m4/wctype_h.m4
index be74ec27000738c79fe9dcf49e887aa98eeab7bf..575f680be23112c6b04c2bbf88187fae26a0f2f2 100644 (file)
--- a/m4/wctype_h.m4
+++ b/m4/wctype_h.m4
@@ -1,8 +1,8 @@
-# wctype_h.m4 serial 4
+# wctype_h.m4 serial 10
 
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
 
-dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
+dnl Copyright (C) 2006-2011 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.
@@ -20,6 +20,22 @@ AC_DEFUN([gl_WCTYPE_H],
     HAVE_ISWCNTRL=0
   fi
   AC_SUBST([HAVE_ISWCNTRL])
+  AC_CHECK_FUNCS_ONCE([iswblank])
+  AC_CHECK_DECLS_ONCE([iswblank])
+  if test $ac_cv_func_iswblank = yes; then
+    HAVE_ISWBLANK=1
+    REPLACE_ISWBLANK=0
+  else
+    HAVE_ISWBLANK=0
+    if test $ac_cv_have_decl_iswblank = yes; then
+      REPLACE_ISWBLANK=1
+    else
+      REPLACE_ISWBLANK=0
+    fi
+  fi
+  AC_SUBST([HAVE_ISWBLANK])
+  AC_SUBST([REPLACE_ISWBLANK])
+
   AC_CHECK_HEADERS_ONCE([wctype.h])
   AC_REQUIRE([AC_C_INLINE])
 
@@ -31,20 +47,25 @@ AC_DEFUN([gl_WCTYPE_H],
   fi
   AC_SUBST([HAVE_WINT_T])
 
-  WCTYPE_H=wctype.h
   if test $ac_cv_header_wctype_h = yes; then
     if test $ac_cv_func_iswcntrl = yes; then
       dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
       dnl The other functions are likely broken in the same way.
       AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
         [
-          AC_RUN_IFELSE([AC_LANG_SOURCE([[
-                            #include <stddef.h>
-                            #include <stdio.h>
-                            #include <time.h>
-                            #include <wchar.h>
-                            #include <wctype.h>
-                            int main () { return iswprint ('x') == 0; }]])],
+          AC_RUN_IFELSE(
+            [AC_LANG_SOURCE([[
+               /* 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>
+               #include <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>
                           #if __GNU_LIBRARY__ == 1
@@ -53,27 +74,13 @@ AC_DEFUN([gl_WCTYPE_H],
               [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
             ])
         ])
-      if test $gl_cv_func_iswcntrl_works = yes; then
-        case "$host_os" in
-          mingw*)
-            dnl On mingw, towlower and towupper return random high 16 bits.
-            ;;
-          *)
-            dnl iswcntrl works. towlower and towupper work as well.
-            WCTYPE_H=
-            ;;
-        esac
-      fi
     fi
-    dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,
-    dnl for the benefit of builds from non-distclean directories.
     gl_CHECK_NEXT_HEADERS([wctype.h])
     HAVE_WCTYPE_H=1
   else
     HAVE_WCTYPE_H=0
   fi
   AC_SUBST([HAVE_WCTYPE_H])
-  AC_SUBST([WCTYPE_H])
 
   if test "$gl_cv_func_iswcntrl_works" = no; then
     REPLACE_ISWCNTRL=1
@@ -81,4 +88,14 @@ AC_DEFUN([gl_WCTYPE_H],
     REPLACE_ISWCNTRL=0
   fi
   AC_SUBST([REPLACE_ISWCNTRL])
+
+  if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
+    dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
+    :
+  else
+    if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
+      dnl Redefine only iswblank.
+      AC_LIBOBJ([iswblank])
+    fi
+  fi
 ])