NEWS.stable: update and finalise

[gnulib.git] / m4 / wctype_h.m4

diff --git a/m4/wctype_h.m4 b/m4/wctype_h.m4
index d2b37ce..ef9fb04 100644 (file)
--- a/m4/wctype_h.m4
+++ b/m4/wctype_h.m4
@@ -1,4 +1,4 @@
-# wctype_h.m4 serial 12
+# wctype_h.m4 serial 14
 
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
 
@@ -11,6 +11,7 @@ dnl Written by Paul Eggert.
 
 AC_DEFUN([gl_WCTYPE_H],
 [
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST])
   AC_CHECK_FUNCS_ONCE([iswcntrl])
@@ -20,21 +21,6 @@ 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_REQUIRE([AC_C_INLINE])
 
@@ -91,10 +77,98 @@ AC_DEFUN([gl_WCTYPE_H],
   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
+
+  dnl We assume that the wctype() and iswctype() functions exist if and only
+  dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that
+  dnl exists.
+  dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>.
+  AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_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>
+            #if HAVE_WCTYPE_H
+            # include <wctype.h>
+            #endif
+            wctype_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctype_t=yes],
+       [gl_cv_type_wctype_t=no])
+    ])
+  if test $gl_cv_type_wctype_t = no; then
+    HAVE_WCTYPE_T=0
+  fi
+
+  dnl We assume that the wctrans() and towctrans() functions exist if and only
+  dnl if the type wctrans_t is defined in <wctype.h>.
+  AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_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>
+            #include <wctype.h>
+            wctrans_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctrans_t=yes],
+       [gl_cv_type_wctrans_t=no])
+    ])
+  if test $gl_cv_type_wctrans_t = no; then
+    HAVE_WCTRANS_T=0
+  fi
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[
+/* 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>
+# include <wchar.h>
+#endif
+#include <wctype.h>
+    ]],
+    [wctype iswctype wctrans towctrans
+    ])
+])
+
+AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+AC_DEFUN([gl_WCTYPE_H_DEFAULTS],
+[
+  GNULIB_ISWBLANK=0;    AC_SUBST([GNULIB_ISWBLANK])
+  GNULIB_WCTYPE=0;      AC_SUBST([GNULIB_WCTYPE])
+  GNULIB_ISWCTYPE=0;    AC_SUBST([GNULIB_ISWCTYPE])
+  GNULIB_WCTRANS=0;     AC_SUBST([GNULIB_WCTRANS])
+  GNULIB_TOWCTRANS=0;   AC_SUBST([GNULIB_TOWCTRANS])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE_ISWBLANK=1;      AC_SUBST([HAVE_ISWBLANK])
+  HAVE_WCTYPE_T=1;      AC_SUBST([HAVE_WCTYPE_T])
+  HAVE_WCTRANS_T=1;     AC_SUBST([HAVE_WCTRANS_T])
+  REPLACE_ISWBLANK=0;   AC_SUBST([REPLACE_ISWBLANK])
 ])