re PR c++/79791 (-Werror=write-strings ignored with -Wpedantic)

	PR c++/79791
	* typeck.c (string_conv_p): In C++11, always call pedwarn with
	OPT_Wwrite_strings.

	* g++.dg/warn/Wwrite-strings-1.C: New test.
	* g++.dg/warn/Wwrite-strings-2.C: New test.
	* g++.dg/warn/Wwrite-strings-3.C: New test.
	* g++.dg/warn/Wwrite-strings-4.C: New test.
	* g++.dg/warn/Wwrite-strings-5.C: New test.
	* g++.dg/warn/Wwrite-strings-6.C: New test.
	* g++.dg/warn/Wwrite-strings-7.C: New test.
	* g++.dg/warn/Wwrite-strings-8.C: New test.
	* g++.dg/warn/Wwrite-strings-9.C: New test.
	* g++.dg/warn/Wwrite-strings-10.C: New test.
	* g++.dg/warn/Wwrite-strings-11.C: New test.
	* g++.dg/warn/Wwrite-strings-12.C: New test.

From-SVN: r245864

gcc/cp/ChangeLog

+2017-03-03  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79791
+	* typeck.c (string_conv_p): In C++11, always call pedwarn with
+	OPT_Wwrite_strings.
+
 2017-03-02  Jason Merrill  <jason@redhat.com>
 
 	Update overload resolution with deduction guides.

gcc/cp/typeck.c

@@ -2175,8 +2175,7 @@ string_conv_p (const_tree totype, const_tree exp, int warn)
   if (warn)
     {
       if (cxx_dialect >= cxx11)
-	pedwarn (input_location,
-		 pedantic ? OPT_Wpedantic : OPT_Wwrite_strings,
+	pedwarn (input_location, OPT_Wwrite_strings,
 		 "ISO C++ forbids converting a string constant to %qT",
 		 totype);
       else

gcc/testsuite/ChangeLog

+2017-03-03  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/79791
+	* g++.dg/warn/Wwrite-strings-1.C: New test.
+	* g++.dg/warn/Wwrite-strings-2.C: New test.
+	* g++.dg/warn/Wwrite-strings-3.C: New test.
+	* g++.dg/warn/Wwrite-strings-4.C: New test.
+	* g++.dg/warn/Wwrite-strings-5.C: New test.
+	* g++.dg/warn/Wwrite-strings-6.C: New test.
+	* g++.dg/warn/Wwrite-strings-7.C: New test.
+	* g++.dg/warn/Wwrite-strings-8.C: New test.
+	* g++.dg/warn/Wwrite-strings-9.C: New test.
+	* g++.dg/warn/Wwrite-strings-10.C: New test.
+	* g++.dg/warn/Wwrite-strings-11.C: New test.
+	* g++.dg/warn/Wwrite-strings-12.C: New test.
+
 2017-03-03  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/79818

gcc/testsuite/g++.dg/warn/Wwrite-strings-1.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+char *s = "foo"; // { dg-warning "ISO C\\+\\+ forbids converting a string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-10.C

+// PR c++/79791
+// { dg-do compile { target { ! c++11 } } }
+// { dg-options "" }
+
+char *s = "foo"; // { dg-warning "deprecated conversion from string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-11.C

+// PR c++/79791
+// { dg-do compile { target { ! c++11 } } }
+// { dg-options "-pedantic-errors" }
+
+char *s = "foo"; // { dg-warning "deprecated conversion from string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-12.C

+// PR c++/79791
+// { dg-do compile { target { ! c++11 } } }
+// { dg-options "-Werror=write-strings" }
+// { dg-message "some warnings being treated as errors" "" { target *-*-* } 0 }
+
+char *s = "foo"; // { dg-error "deprecated conversion from string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-2.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-pedantic-errors" }
+
+char *s = "foo"; // { dg-error "ISO C\\+\\+ forbids converting a string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-3.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-pedantic-errors -Wno-write-strings" }
+
+char *s = "foo";

gcc/testsuite/g++.dg/warn/Wwrite-strings-4.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Werror=write-strings" }
+// { dg-message "some warnings being treated as errors" "" { target *-*-* } 0 }
+
+char *s = "foo"; // { dg-error "ISO C\\+\\+ forbids converting a string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-5.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Werror=write-strings -Wpedantic" }
+// { dg-message "some warnings being treated as errors" "" { target *-*-* } 0 }
+
+char *s = "foo"; // { dg-error "ISO C\\+\\+ forbids converting a string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-6.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Werror=write-strings -Wno-pedantic" }
+// { dg-message "some warnings being treated as errors" "" { target *-*-* } 0 }
+
+char *s = "foo"; // { dg-error "ISO C\\+\\+ forbids converting a string constant" }

gcc/testsuite/g++.dg/warn/Wwrite-strings-7.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wno-write-strings" }
+
+char *s = "foo";

gcc/testsuite/g++.dg/warn/Wwrite-strings-8.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wpedantic -Wno-write-strings" }
+
+char *s = "foo";

gcc/testsuite/g++.dg/warn/Wwrite-strings-9.C

+// PR c++/79791
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wno-error=write-strings -pedantic-errors" }
+
+char *s = "foo"; // { dg-warning "ISO C\\+\\+ forbids converting a string constant" }