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* [PATCH] Add -gcodeview option
@ 2022-10-24  0:28 Mark Harmstone
  2022-10-24 11:08 ` Martin Storsjö
  0 siblings, 1 reply; 5+ messages in thread
From: Mark Harmstone @ 2022-10-24  0:28 UTC (permalink / raw)
  To: gcc-patches, martin; +Cc: Mark Harmstone

Both current lld and the next version of ld have an option -pdb, which
creates a PDB file which Microsoft's debuggers can use. This patch adds
a -gcodeview option, which passes this to the linker.

I do intend to expand this so it also creates the .debug$S and .debug$T
sections which would make this useful - I submitted patches for this a
while back, but they need to be rewritten to parse the DWARF DIEs rather
than using debug_hooks.

Clang also has -gcodeview, but AFAICS only uses it for .debug$S and
.debug$T, and doesn't use it for linker options (though IMO it probably

 gcc/common.opt      | 4 ++++
 gcc/doc/invoke.texi | 7 +++++++
 gcc/          | 4 ++++
 gcc/         | 3 +++
 4 files changed, 18 insertions(+)

diff --git a/gcc/common.opt b/gcc/common.opt
index 8a0dafc522d..77103f961d8 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -3253,6 +3253,10 @@ gas-locview-support
 Common Driver Var(dwarf2out_as_locview_support)
 Assume assembler support for view in (DWARF2+) .loc directives.
+Common Driver JoinedOrMissing
+Generate debug information in CodeView format.
 Common Driver WarnRemoved
 Does nothing.  Preserved for backward compatibility.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index ff6c338bedb..2d29fd2611d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -483,6 +483,7 @@ Objective-C and Objective-C++ Dialects}.
 -gstabs  -gstabs+  -gstrict-dwarf  -gno-strict-dwarf @gol
 -gas-loc-support  -gno-as-loc-support @gol
 -gas-locview-support  -gno-as-locview-support @gol
+-gcodeview @gol
 -gcolumn-info  -gno-column-info  -gdwarf32  -gdwarf64 @gol
 -gstatement-frontiers  -gno-statement-frontiers @gol
 -gvariable-location-views  -gno-variable-location-views @gol
@@ -10358,6 +10359,12 @@ assembler (GAS) to fail with an error.
 Produce debugging information in Alpha/VMS debug format (if that is
 supported).  This is the format used by DEBUG on Alpha/VMS systems.
+@item -gcodeview
+@opindex gcodeview
+Produce debugging information in CodeView debug format (if that is
+supported).  This is the format used by Microsoft Visual C++ on
 @item -g@var{level}
 @itemx -ggdb@var{level}
 @itemx -gstabs@var{level}
diff --git a/gcc/ b/gcc/
index bb07cc244e3..2820f325282 100644
--- a/gcc/
+++ b/gcc/
@@ -4608,6 +4608,10 @@ driver_handle_option (struct gcc_options *opts,
       do_save = false;
+    case OPT_gcodeview:
+      add_infile ("-pdb=", "*");
+      break;
       /* Various driver options need no special processing at this
 	 point, having been handled in a prescan above or being
diff --git a/gcc/ b/gcc/
index 3a89da2dd03..e2633ee5439 100644
--- a/gcc/
+++ b/gcc/
@@ -3089,6 +3089,9 @@ common_handle_option (struct gcc_options *opts,
       set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
+    case OPT_gcodeview:
+      break;
     case OPT_gstabs:
     case OPT_gstabs_:
       set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2022-10-27  3:37 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-10-24  0:28 [PATCH] Add -gcodeview option Mark Harmstone
2022-10-24 11:08 ` Martin Storsjö
2022-10-24 23:20   ` Mark Harmstone
2022-10-25  8:21     ` Martin Storsjö
2022-10-27  3:36       ` Mark Harmstone

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