[patch] Infer TOOL/TOOL_FAMILY from vxworks-predef.h on VxWorks7

[Olivier Hainque]

Hello,


This change moves, for VxWorks 7, the setting of the TOOL and TOOL_FAMILY

macros from a builtin_define to a run-time computation from
vxworks-predefs.h.



This is useful on Vx7 to allow a single toolchain to be used with instances

of VxWorks based on either a gnu or an llvm system toolchain for a given cpu

(typically, powerpc).



This is achieved by leveraging the existence of a very basic autoconf.h file

in all VxWorks 7 VSBs, #included directly from vxworks-predef.h.


We have been using this in-house across our complete set of VxWorks targets

for about three years now.


Committing to mainline after a successful build for

--target=powerpc-wrs-vxworks7r2.


Olivier


2025-12-20  Olivier Hainque  <hain...@adacore.com>


    gcc/

            * config/vxworks.h (VXWORKS_OS_CPP_BUILTINS): Only

            builtin_define TOOL and TOOL_FAMILY for !TARGET_VXWORKS7.

            Augment comment on VXWORKS_PERSONALITY.

            * config/vxworks/vxworks-predef.h: Infer TOOL and TOOL_FAMILY

            from the VSB autoconf.h when we have one, determined by the
presence

            of a _VSB_CONFIG_FILE definition.



    libgcc/

            * config/t-vxworks: -include vxworks-predef.h explicitly, as the

            automatic inclusion is disabled by -nostdinc.

0001-Infer-TOOL-TOOL_FAMILY-from-vxworks-predef.h-on-VxWo.patch
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