On Tue, 2020-09-29 at 15:56 +0200, Mark Wielaard wrote:
> On Thu, 2020-09-10 at 13:16 +0200, Jakub Jelinek wrote:
> > On Wed, Sep 09, 2020 at 09:57:54PM +0200, Mark Wielaard wrote:
> > > --- a/gcc/doc/invoke.texi
> > > +++ b/gcc/doc/invoke.texi
> > > @@ -9057,13 +9057,14 @@ possible.
> > > @opindex gdwarf
> > > Produce debugging information in DWARF format (if that is supported).
> > > The value of @var{version} may be either 2, 3, 4 or 5; the default
> > > version
> > > -for most targets is 4. DWARF Version 5 is only experimental.
> > > +for most targets is 5 (with the exception of vxworks and darwin which
> > > +default to version 2).
> >
> > I think in documentation we should spell these VxWorks and Darwin/Mac OS X
>
> OK. As attached.
>
> Are we ready to flip the default to 5?
Ping. It would be good to get this in now so that we can fix issues (if
any) with the DWARF5 support in the general bugfixing stage 3.
Thanks,
Mark
From c04727b6209ad4d52d1b9ba86873961bda0e1724 Mon Sep 17 00:00:00 2001
From: Mark Wielaard <m...@klomp.org>
Date: Tue, 29 Sep 2020 15:52:44 +0200
Subject: [PATCH] Default to DWARF5
gcc/ChangeLog:
* common.opt (gdwarf-): Init(5).
* doc/invoke.texi (-gdwarf): Document default to 5.
---
gcc/common.opt | 2 +-
gcc/doc/invoke.texi | 7 ++++---
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/gcc/common.opt b/gcc/common.opt
index 9552cebe0d6c..dd92ef1027c6 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -3164,7 +3164,7 @@ Common Driver JoinedOrMissing Negative(gdwarf-)
Generate debug information in default version of DWARF format.
gdwarf-
-Common Driver Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
+Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs)
Generate debug information in DWARF v2 (or later) format.
ggdb
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b3a2c7ce51d8..f31d6a46fff8 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9410,14 +9410,15 @@ possible.
@itemx -gdwarf-@var{version}
@opindex gdwarf
Produce debugging information in DWARF format (if that is supported).
-The value of @var{version} may be either 2, 3, 4 or 5; the default version
-for most targets is 4. DWARF Version 5 is only experimental.
+The value of @var{version} may be either 2, 3, 4 or 5; the default
+version for most targets is 5 (with the exception of VxWorks and
+Darwin/Mac OS X which default to version 2).
Note that with DWARF Version 2, some ports require and always
use some non-conflicting DWARF 3 extensions in the unwind tables.
Version 4 may require GDB 7.0 and @option{-fvar-tracking-assignments}
-for maximum benefit.
+for maximum benefit. Version 5 requires GDB 8.0 or higher.
GCC no longer supports DWARF Version 1, which is substantially
different than Version 2 and later. For historical reasons, some
--
2.18.4
