On Thu, 9 Jun 2011, Eric Botcazou wrote:
> > Poison it (in system.h)?
>
> Let's keep pretending that it never existed. :-)

No can do.  It had been there for too many releases (even one is
one too many), at least 13 years according to the ChangeLogs.
I even went looking for it for PR48542 having a vague
recollection of it.  Committed as obvious.

gcc:
        * system.h (SETJMP_VIA_SAVE_AREA): Poison.

Index: system.h
===================================================================
--- system.h    (revision 174865)
+++ system.h    (working copy)
@@ -826,7 +826,8 @@ extern void fancy_abort (const char *, i
        FUNCTION_ARG_BOUNDARY MUST_USE_SJLJ_EXCEPTIONS US_SOFTWARE_GOFAST  \
        USING_SVR4_H SVR4_ASM_SPEC FUNCTION_ARG FUNCTION_ARG_ADVANCE       \
        FUNCTION_INCOMING_ARG IRA_COVER_CLASSES TARGET_VERSION             \
-       MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS
+       MACHINE_TYPE TARGET_HAS_TARGETCM ASM_OUTPUT_BSS                    \
+       SETJMP_VIA_SAVE_AREA

 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE  \

brgds, H-P

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