target_supports.exp (check_effective_target_4byte_wchar_t): New proc.

	* lib/target_supports.exp (check_effective_target_4byte_wchar_t):
	New proc.
	* gcc.dg/utf16-4.c: Use it.
	* gcc.dg/utf32-4.c: Use it.
	* g++.dg/ext/utf16-4.C: Use it.
	* gcc.dg/ext/utf32-4.C: Use it.

From-SVN: r134971

gcc/testsuite/ChangeLog

+2008-05-06  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	* lib/target_supports.exp (check_effective_target_4byte_wchar_t):
+	New proc.
+	* gcc.dg/utf16-4.c: Use it.
+	* gcc.dg/utf32-4.c: Use it.
+	* g++.dg/ext/utf16-4.C: Use it.
+	* gcc.dg/ext/utf32-4.C: Use it.
+
 2008-05-05  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* gfortran.dg/dev_null.f90. Remove and replace with...

gcc/testsuite/g++.dg/ext/utf16-4.C

@@ -13,6 +13,6 @@ const static char16_t	c5 = U'\u2029';
 const static char16_t	c6 = U'\U00064321';	/* { dg-warning "implicitly truncated" } */
 const static char16_t	c7 = L'a';
 const static char16_t	c8 = L'\u2029';
-const static char16_t	c9 = L'\U00064321';	/* { dg-warning "implicitly truncated" } */
-
+const static char16_t	c9 = L'\U00064321';	/* { dg-warning "implicitly truncated" "" { target { 4byte_wchar_t } } 16 } */
+						/* { dg-warning "constant too long" "" { target { ! 4byte_wchar_t } } 16 } */
 int main () {}

gcc/testsuite/g++.dg/ext/utf32-4.C

@@ -13,6 +13,6 @@ const static char32_t	c5 = u'\u2029';
 const static char32_t	c6 = u'\U00064321';	/* { dg-warning "constant too long" } */
 const static char32_t	c7 = L'a';
 const static char32_t	c8 = L'\u2029';
-const static char32_t	c9 = L'\U00064321';
+const static char32_t	c9 = L'\U00064321';     /* { dg-warning "constant too long" { target { ! 4byte_wchar_t } } } */  
 
 int main () {}

gcc/testsuite/gcc.dg/utf16-4.c

@@ -15,6 +15,7 @@ char16_t	c5 = U'\u2029';
 char16_t	c6 = U'\U00064321';	/* { dg-warning "implicitly truncated" } */
 char16_t	c7 = L'a';
 char16_t	c8 = L'\u2029';
-char16_t	c9 = L'\U00064321';	/* { dg-warning "implicitly truncated" } */
+char16_t 	c9 = L'\U00064321';	/* { dg-warning "implicitly truncated" "" { target { 4byte_wchar_t } } 18 } */
+					/* { dg-warning "constant too long" "" { target { ! 4byte_wchar_t } } 18 } */
 
 int main () {}

gcc/testsuite/gcc.dg/utf32-4.c

@@ -15,6 +15,6 @@ char32_t	c5 = u'\u2029';
 char32_t	c6 = u'\U00064321';	/* { dg-warning "constant too long" } */
 char32_t	c7 = L'a';
 char32_t	c8 = L'\u2029';
-char32_t	c9 = L'\U00064321';
+char32_t	c9 = L'\U00064321';     /* { dg-warning "constant too long" { target { ! 4byte_wchar_t } } } */  
 
 int main () {}

gcc/testsuite/lib/target-supports.exp

@@ -2352,3 +2352,11 @@ proc check_effective_target_c99_runtime { } {
 	    $contents [add_options_for_c99_runtime ""]
     }]
 }
+
+# Return 1 if  target wchar_t is at least 4 bytes.
+
+proc check_effective_target_4byte_wchar_t { } {
+    return [check_no_compiler_messages 4byte_wchar_t object {
+	int dummy[sizeof (wchar_t) >= 4 ? 1 : -1];
+    }]
+}