[C++ Patch] Fix three locations

[Paolo Carlini]

Hi,

three additional fixes along the usual lines. In the grokdeclarator 
changes I'm not touching the actual printing of the name, but another 
option would be using %qD and decl here too, thus, for cases like 
parse/crash43.C, where everything lives inside a namespace, we would 
print 'N::i'. instead of simply 'i'. Tested x86_64-linux, plus I checked 
by hand with a cross-compiler the dllimport bit.

Thanks, Paolo.

////////////////////////

-------------- next part --------------
/cp
2019-01-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (start_decl): Improve error location.
	(grokdeclarator): Likewise, improve two locations.

/testsuite
2019-01-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/diagnostic/extern-initialized.C: New.
	* g++.dg/ext/dllimport-initialized.C: Likewise.
-------------- next part --------------
Index: cp/decl.c
===================================================================
--- cp/decl.c	(revision 267756)
+++ cp/decl.c	(working copy)
@@ -5096,7 +5096,8 @@ start_decl (const cp_declarator *declarator,
      a definition.  */
   if (initialized && DECL_DLLIMPORT_P (decl))
     {
-      error ("definition of %q#D is marked %<dllimport%>", decl);
+      error_at (DECL_SOURCE_LOCATION (decl),
+		"definition of %q#D is marked %<dllimport%>", decl);
       DECL_DLLIMPORT_P (decl) = 0;
     }
 
@@ -12791,11 +12792,13 @@ grokdeclarator (const cp_declarator *declarator,
 	    /* It's common practice (and completely valid) to have a const
 	       be initialized and declared extern.  */
 	    if (!(type_quals & TYPE_QUAL_CONST))
-	      warning (0, "%qs initialized and declared %<extern%>", name);
+	      warning_at (DECL_SOURCE_LOCATION (decl), 0,
+			  "%qs initialized and declared %<extern%>", name);
 	  }
 	else
 	  {
-	    error ("%qs has both %<extern%> and initializer", name);
+	    error_at (DECL_SOURCE_LOCATION (decl),
+		      "%qs has both %<extern%> and initializer", name);
 	    return error_mark_node;
 	  }
       }
Index: testsuite/g++.dg/diagnostic/extern-initialized.C
===================================================================
--- testsuite/g++.dg/diagnostic/extern-initialized.C	(nonexistent)
+++ testsuite/g++.dg/diagnostic/extern-initialized.C	(working copy)
@@ -0,0 +1,6 @@
+extern int i __attribute__((unused)) = 0;  // { dg-warning "12:.i. initialized and declared .extern." }
+
+void foo()
+{
+  extern int i __attribute__((unused)) = 0;  // { dg-error "14:.i. has both .extern. and initializer" }
+}
Index: testsuite/g++.dg/ext/dllimport-initialized.C
===================================================================
--- testsuite/g++.dg/ext/dllimport-initialized.C	(nonexistent)
+++ testsuite/g++.dg/ext/dllimport-initialized.C	(working copy)
@@ -0,0 +1,3 @@
+// { dg-do compile { target i?86-*-cygwin* i?86-*-mingw* x86_64-*-mingw* } }
+
+__attribute__((dllimport)) int i __attribute__((unused)) = 0;  // { dg-error "32:definition of .int i. is marked .dllimport." }