errors: don't display "warnings treated as errors"

This line doesn't add any meaningful information anymore, the appended
[-Werror=CATEGORY] is enough.  It is actually more insightful, as it
allows to distinguish warnings treated as errors from those that
aren't.  This line is also removed by gcc 4.8.

* src/complain.c (set_warnings_issued): The only action left was
checking if the error bit corresponding to the warning issued was set,
and that function was only called once. Therefore, remove it, and do
its job directly in the caller...
(complains): here.
* src/complains.h: Adjust.
* tests/input.at: Adjust.
* NEWS: Document this change.

Signed-off-by: Akim Demaille <akim@lrde.epita.fr>

diff --git a/NEWS b/NEWS
index 1d4e0fa138537c0a17861ab6067f9adb549dda79..ee1b0957bfeb02aa0339574a5bcdace6e85bddbc 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -39,25 +39,24 @@ GNU Bison NEWS
   Yacc-like behavior (e.g., always generate y.tab.c), but to report
   incompatibilities as warnings: "-y -Wno-error=yacc".
 
-*** Warning categories are now displayed and prefix changes
+*** The display of warnings is now richer
 
-  For instance:
+  The option that controls a given warning is now displayed:
 
-  foo.y:4.6: warning: type clash on default action: <foo> != <bar> [-Wother]
+    foo.y:4.6: warning: type clash on default action: <foo> != <bar> [-Wother]
 
-  In the case of warnings treated as errors, the suffix is displayed, in a
-  manner similar to gcc, as [-Werror=CATEGORY]. Also, the prefix is changed
-  from "warning: " to "error: ".
+  In the case of warnings treated as errors, the prefix is changed from
+  "warning: " to "error: ", and the suffix is displayed, in a manner similar
+  to gcc, as [-Werror=CATEGORY].
 
-  For instance, considering the above change, an output for -Werror=other
-  would have been:
+  For instance, where the previous version of Bison would report (and exit
+  with failure):
 
     bison: warnings being treated as errors
-    input.y:1.1: warning: stray ',' treated as white space [-Wother]
+    input.y:1.1: warning: stray ',' treated as white space
 
-  But it is actually:
+  it now reports:
 
-    bison: warnings being treated as errors
     input.y:1.1: error: stray ',' treated as white space [-Werror=other]
 
 *** Deprecated constructs

diff --git a/src/complain.c b/src/complain.c
index d4098f7f42102aca61de27da4ffe01b7c80cc054..53bb5cb654a017394f3de4155905c35480a901f4 100644 (file)
--- a/src/complain.c
+++ b/src/complain.c
@@ -134,9 +134,8 @@ complains (const location *loc, warnings flags, const char *message,
     {
       const char* prefix =
         flags & (errors_flag | complaint) ? _("error") : _("warning");
-      if (flags & complaint)
+      if (flags & (complaint | errors_flag))
         complaint_issued = true;
-      set_warning_issued (flags);
       error_message (loc, flags,
                      indent_ptr && *indent_ptr ? NULL : prefix,
                      message, args);
@@ -171,20 +170,3 @@ void complain_at_indent (location loc, warnings flags, unsigned *indent,
   complains (&loc, flags, message, args);
   va_end (args);
 }
-
-
-/*--------------------------------.
-| Report a warning, and proceed.  |
-`--------------------------------*/
-
-void
-set_warning_issued (warnings warning)
-{
-  static bool warning_issued = false;
-  if (!warning_issued && (warning & warnings_flag & errors_flag))
-    {
-      fprintf (stderr, "%s: warnings being treated as errors\n", program_name);
-      complaint_issued = true;
-    }
-  warning_issued = true;
-}

diff --git a/src/complain.h b/src/complain.h
index 840e7369cf53ad25a75d75f5a475d3e4490d1893..1d47391429162a2800aba7481fbe447752f062ca 100644 (file)
--- a/src/complain.h
+++ b/src/complain.h
@@ -21,6 +21,9 @@
 
 # include "location.h"
 
+/* Sub-messages indent. */
+#define SUB_INDENT (4)
+
 /*-------------.
 | --warnings.  |
 `-------------*/
@@ -54,16 +57,6 @@ extern warnings errors_flag;
 /** Display a "[-Wyacc]" like message on stderr.  */
 void warnings_print_categories (warnings warn_flags);
 
-/* Sub-messages indent. */
-#define SUB_INDENT (4)
-
-/** Record that a warning is about to be issued, and treat it as an
-    error if <tt>warnings_flag & Werror</tt>.  This is exported
-    only for the sake of Yacc-compatible conflict reports in conflicts.c.
-    All other warnings should be implemented in complain.c and should use
-    the normal warning format.  */
-void set_warning_issued (warnings warning);
-
 /** Make a complaint, but don't specify any location.  */
 void complain (warnings flags, char const *message, ...)
   __attribute__ ((__format__ (__printf__, 2, 3)));

diff --git a/tests/input.at b/tests/input.at
index c14989404ecbc17a02509fec2a04d27cd9ff4b75..188ed166e823ac8beadd5a6d4dfcbef5600696a2 100644 (file)
--- a/tests/input.at
+++ b/tests/input.at
@@ -1460,8 +1460,7 @@ AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
 # -Werror is not disabled by -Wnone or equivalent.
 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
-[[bison: warnings being treated as errors
-input.y:2.1-7: error: POSIX Yacc forbids dashes in symbol names: foo-bar [-Werror=yacc]
+[[input.y:2.1-7: error: POSIX Yacc forbids dashes in symbol names: foo-bar [-Werror=yacc]
 ]])
 [mv stderr experr]
 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])