Re: [Patch, testsuite] Add missing -gdwarf-2 flag in debug/dwarf2 testcase

[Senthil Kumar Selvaraj <senthil_kumar dot selvaraj at atmel dot com>]

On Fri, Apr 05, 2013 at 12:02:49AM +0530, Senthil Kumar Selvaraj wrote:
> On Thu, Apr 04, 2013 at 01:41:30PM -0400, Jason Merrill wrote:
> > On 04/04/2013 11:48 AM, Senthil Kumar Selvaraj wrote:
> > >+Common Var(dwarf_version, 4) Negative(gdwarf-)
> > 
> > I don't think you need to mention the variable on this line; it's
> > already there and statically initialized for gdwarf-.
> > 
> Yeah, you're right. I was originally attempting to use "value"
> directly, and that of course, didn't work as it was set to 1.
> Sorry, I should have been more careful.
> 
> > >I wasn't able to get this done in a clean way. To make the gdwarf option
> > >handling code detect this error, the only I found was to make it
> > >JoinedOrMissing, and then raise the error if there was an argument
> > >provided.
> > 
> > That sounds clean enough to me.
> > 
> 
> Ok, I thought it was odd to specify that gdwarf has an optional
> argument in the opt file, only to reject it outright when processing it.
> Will send another patch tomorrow.

I added detection and error emission if version is specified with
gdwarf. Does this look ok?

Regards
Senthil


diff --git gcc/common.opt gcc/common.opt
index e02e7ed..e3645c3 100644
--- gcc/common.opt
+++ gcc/common.opt
@@ -2308,9 +2308,13 @@ Common JoinedOrMissing
 Generate debug information in default format
 
 gcoff
-Common JoinedOrMissing Negative(gdwarf-)
+Common JoinedOrMissing Negative(gdwarf)
 Generate debug information in COFF format
 
+gdwarf
+Common JoinedOrMissing UInteger Negative(gdwarf-)
+Generate debug information in the default DWARF version format
+
 gdwarf-
 Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
 Generate debug information in DWARF v2 (or later) format
diff --git gcc/opts.c gcc/opts.c
index 45b12fe..4bfee42 100644
--- gcc/opts.c
+++ gcc/opts.c
@@ -1699,6 +1699,17 @@ common_handle_option (struct gcc_options *opts,
       set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
       break;
 
+    case OPT_gdwarf:
+      if (arg && strlen(arg) != 0)
+        {
+          error_at (loc, "dwarf version is not allowed. "
+                  "Try -gdwarf-%d or -g%d instead.", value, value);
+          break;
+        }
+      else
+        {
+          value = opts->x_dwarf_version;
+        }
     case OPT_gdwarf_:
       if (value < 2 || value > 4)
 	error_at (loc, "dwarf version %d is not supported", value);