On Thu, Feb 14, 2013 at 12:17 AM, John David Anglin wrote:
> On 2013-02-13 3:33 PM, David Edelsohn wrote:
>>
>> Perhaps Dave can explain what would have to be done to move this
>> > platform to DWARF2...?
>> >
>
> I had looked at this a bit in the past. I don't think it's that difficult
> to add DWARF2 support
> to GCC on hppa. Although we don't support named sections, we can create
> named subspaces
> for the dwarf info. More of an issue in my mind is the changes needed to
> gdb to recognize
> this support.
>
> I agree with David that it might be better to give up pch.
That'd be a really a good start.
How about something like the attached patch for trunk?
Tested on powerpc64-linux pch.exp with -gstabs.
Ciao!
Steven
c-family/
* c-opts.c (c_common_handle_option): Warn that pre-compiled headers
with debug formats other than DWARF are deprecated.
testsuite/
* lib/dg-pch.exp: Compile the PCH with extra flag -Wno-deprecated.
c-family/
* c-opts.c (c_common_handle_option): Warn that pre-compiled headers
with debug formats other than DWARF are deprecated.
testsuite/
* lib/dg-pch.exp: Compile the PCH with extra flag -Wno-deprecated.
Index: c-family/c-opts.c
===================================================================
--- c-family/c-opts.c (revision 196032)
+++ c-family/c-opts.c (working copy)
@@ -268,6 +268,10 @@ c_common_handle_option (size_t scode, const char *
break;
case OPT__output_pch_:
+ if (write_symbols != NO_DEBUG && write_symbols != DWARF2_DEBUG)
+ warning (OPT_Wdeprecated,
+ "the \"%s\" debug format cannot be used with pre-compiled
headers",
+ debug_type_names[write_symbols]);
pch_file = arg;
break;
Index: testsuite/lib/dg-pch.exp
===================================================================
--- testsuite/lib/dg-pch.exp (revision 196032)
+++ testsuite/lib/dg-pch.exp (working copy)
@@ -39,8 +39,12 @@ proc dg-flags-pch { subdir test otherflags options
set dg-do-what-default precompile
catch { file_on_host delete "$bname$suffix" }
gcc_copy_files "[file rootname $test]${suffix}s" "$bname$suffix"
- dg-test -keep-output "./$bname$suffix" "$otherflags $flags" ""
+ # Suppress -Wdeprecated to allow PCH tests to work with non-DWARF2
+ # debug formats. Support for such combinations has been deprecated
+ # for GCC 4.8.
+ dg-test -keep-output "./$bname$suffix" "$otherflags $flags
-Wno-deprecated" ""
+
# For the rest, the default is to compile to .s.
set dg-do-what-default compile
