DWARF unwind info is supported on VxWorks

DWARF unwind info is supported on VxWorks

[Olivier Hainque]

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VxWorks has had support for dwarf unwinding for many years now. This patch
adjusts our configuration accordingly.

2017-06-02  Olivier Hainque  <hainque@adacore.com>

	* config/vx-common.h (DWARF_UNWIND_INFO): Switch #define to 1. 


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Index: config/vx-common.h
===================================================================
--- config/vx-common.h	(revision 248673)
+++ config/vx-common.h	(working copy)
@@ -61,9 +61,9 @@
 #undef WINT_TYPE_SIZE
 #define WINT_TYPE_SIZE 16
 
-/* Dwarf2 unwind info is not supported.  */
+/* Dwarf2 unwind info is supported.  */
 #undef DWARF2_UNWIND_INFO
-#define DWARF2_UNWIND_INFO 0
+#define DWARF2_UNWIND_INFO 1
 
 /* VxWorks uses DWARF2.  */
 #define DWARF2_DEBUGGING_INFO 1

Re: DWARF unwind info is supported on VxWorks

[Olivier Hainque]

> On Jun 2, 2017, at 16:43 , Olivier Hainque <hainque@adacore.com> wrote:
> 
> VxWorks has had support for dwarf unwinding for many years now. This patch
> adjusts our configuration accordingly.

A few extra details:

I noticed this while trying to build an Ada runtime for VxWorks from the
current mainline.

A few sources referenced by the Makefile are missing and I'm about to add them.
Some of them rely on having a definition for EH_FRAME_DEBUG_SECTION, which we
don't have with DWARF_UNWIND_INFO defined to 0, causing the build to fail.

We have been using the patch in-house for years, and I verified that it allows
the runtime build to go past the failure point with mainline.

Olivier