builtin_define _VX_TOOL and _VX_TOOL_FAMILY for VxWorks

builtin_define _VX_TOOL and _VX_TOOL_FAMILY for VxWorks

[Olivier Hainque]

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Hello,

Defining at least one of the two is needed on VxWorks 7 and helpful
in some cases on VxWorks 6.

We have been using this in house for all our ports for a while, and I verified
that it allows a toolchain + libgcc build for x86_64-vxworks7 to finish with
mainline, in association with further patches to come for the general support
of vxworks 7 and the x86_64 configuration in particular.

Committing to mainline.

2017-06-26  Jerome Lambourg  <lambourg@adacore.com>

	* config/vxworks.h (VXWORKS_OS_CPP_BUILTINS): builtin_define
	_VX_TOOL_FAMILY and _VX_TOOL to gnu. 

With Kind Regards,

Olivier


[-- Attachment #2: 0001-improve-automatic-defines-on-VxWorks.patch --]
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--- a/gcc/config/vxworks.h
+++ b/gcc/config/vxworks.h
@@ -131,6 +131,8 @@ extern void vxworks_asm_out_destructor (rtx symbol, int priority);
 	builtin_define ("__RTP__");					\
       else								\
 	builtin_define ("_WRS_KERNEL");					\
+      builtin_define ("_VX_TOOL_FAMILY=gnu");				\
+      builtin_define ("_VX_TOOL=gnu");					\
     }									\
   while (0)
 
-- 
1.7.10.4