lex.c (_cpp_lex_direct): Use CPP_DL_NOTE instead of CPP_DL_PEDWARN...

	* lex.c (_cpp_lex_direct): Use CPP_DL_NOTE instead of CPP_DL_PEDWARN,
	CPP_DL_WARNING or CPP_DL_ERROR for note that diagnostics for C++ style
	comments is reported only once per file and guard those calls on the
	preceding cpp_error returning true.

	* gcc.dg/cpp/pr61854-c90.c (foo): Expect a note, rather than error.
	* gcc.dg/cpp/pr61854-c94.c (foo): Likewise.
	* gcc.dg/cpp/pr61854-4.c (foo): Likewise.
	* gcc.dg/cpp/pr61854-8.c: New test.

From-SVN: r262832

gcc/testsuite/ChangeLog

+2018-07-17  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.dg/cpp/pr61854-c90.c (foo): Expect a note, rather than error.
+	* gcc.dg/cpp/pr61854-c94.c (foo): Likewise.
+	* gcc.dg/cpp/pr61854-4.c (foo): Likewise.
+	* gcc.dg/cpp/pr61854-8.c: New test.
+
 2018-07-17  David Edelsohn <dje.gcc@gmail.com>
 
 	* gcc.target/powerpc/pr85456.c: Require longdouble128.

gcc/testsuite/gcc.dg/cpp/pr61854-4.c

@@ -12,5 +12,5 @@ foo (void)
   // But error here.
 #endif
   /* { dg-error "C\\+\\+ style comments are not allowed in ISO C90" "comments"  { target *-*-*} 12 } */
-  /* { dg-error "reported only once" ""  { target *-*-*} 12 } */
+  /* { dg-message "note: \[^\n\r]*reported only once" ""  { target *-*-*} 12 } */
 }

gcc/testsuite/gcc.dg/cpp/pr61854-8.c

+/* PR c/61854 */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu89 -pedantic -w" } */
+
+int
+main (void)
+{
+  // Comment.
+  /* { dg-bogus "C\\+\\+ style comments are not allowed in ISO C90" "comments"  { target *-*-*} .-1 } */
+  /* { dg-bogus "note: \[^\n\r]*reported only once" ""  { target *-*-*} .-2 } */
+  return 0;
+}

gcc/testsuite/gcc.dg/cpp/pr61854-c90.c

@@ -7,7 +7,7 @@ foo (void)
 {
   // 1st
   /* { dg-error "C\\+\\+ style comments are not allowed in ISO C90" "comments"  { target *-*-*} .-1 } */
-  /* { dg-error "reported only once" ""  { target *-*-*} .-2 } */
+  /* { dg-message "note: \[^\n\r]*reported only once" ""  { target *-*-*} .-2 } */
   // 2nd
   // 3rd
 }

gcc/testsuite/gcc.dg/cpp/pr61854-c94.c

@@ -7,7 +7,7 @@ foo (void)
 {
   // 1st
   /* { dg-error "C\\+\\+ style comments are not allowed in ISO C90" "comments"  { target *-*-*} .-1 } */
-  /* { dg-error "reported only once" ""  { target *-*-*} .-2 } */
+  /* { dg-message "note: \[^\n\r]*reported only once" ""  { target *-*-*} .-2 } */
   // 2nd
   // 3rd
 }

libcpp/ChangeLog

+2018-07-17  Jason Franklin  <j_fra@fastmail.us>
+	    Jakub Jelinek  <jakub@redhat.com>
+
+	* lex.c (_cpp_lex_direct): Use CPP_DL_NOTE instead of CPP_DL_PEDWARN,
+	CPP_DL_WARNING or CPP_DL_ERROR for note that diagnostics for C++ style
+	comments is reported only once per file and guard those calls on the
+	preceding cpp_error returning true.
+
 2018-07-03  Nathan Sidwell  <nathan@acm.org>
 
 	Reorg line_map data structures for better packing.

libcpp/lex.c

@@ -2872,10 +2872,10 @@ _cpp_lex_direct (cpp_reader *pfile)
 		   && CPP_PEDANTIC (pfile)
 		   && ! buffer->warned_cplusplus_comments)
 	    {
-	      cpp_error (pfile, CPP_DL_PEDWARN,
-			 "C++ style comments are not allowed in ISO C90");
-	      cpp_error (pfile, CPP_DL_PEDWARN,
-			 "(this will be reported only once per input file)");
+	      if (cpp_error (pfile, CPP_DL_PEDWARN,
+			     "C++ style comments are not allowed in ISO C90"))
+		cpp_error (pfile, CPP_DL_NOTE,
+			   "(this will be reported only once per input file)");
 	      buffer->warned_cplusplus_comments = 1;
 	    }
 	  /* Or if specifically desired via -Wc90-c99-compat.  */
@@ -2883,10 +2883,10 @@ _cpp_lex_direct (cpp_reader *pfile)
 		   && ! CPP_OPTION (pfile, cplusplus)
 		   && ! buffer->warned_cplusplus_comments)
 	    {
-	      cpp_error (pfile, CPP_DL_WARNING,
-			 "C++ style comments are incompatible with C90");
-	      cpp_error (pfile, CPP_DL_WARNING,
-			 "(this will be reported only once per input file)");
+	      if (cpp_error (pfile, CPP_DL_WARNING,
+			     "C++ style comments are incompatible with C90"))
+		cpp_error (pfile, CPP_DL_NOTE,
+			   "(this will be reported only once per input file)");
 	      buffer->warned_cplusplus_comments = 1;
 	    }
 	  /* In C89/C94, C++ style comments are forbidden.  */
@@ -2906,11 +2906,12 @@ _cpp_lex_direct (cpp_reader *pfile)
 		}
 	      else if (! buffer->warned_cplusplus_comments)
 		{
-		  cpp_error (pfile, CPP_DL_ERROR,
-			     "C++ style comments are not allowed in ISO C90");
-		  cpp_error (pfile, CPP_DL_ERROR,
-			     "(this will be reported only once per input "
-			     "file)");
+		  if (cpp_error (pfile, CPP_DL_ERROR,
+				 "C++ style comments are not allowed in "
+				 "ISO C90"))
+		    cpp_error (pfile, CPP_DL_NOTE,
+			       "(this will be reported only once per input "
+			       "file)");
 		  buffer->warned_cplusplus_comments = 1;
 		}
 	    }