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Re: issue with placing includes in gcc-plugin.h


On 14 January 2015 at 16:18, Richard Biener <rguenther@suse.de> wrote:
> On Wed, 14 Jan 2015, Prathamesh Kulkarni wrote:
>
>> On 14 January 2015 at 16:13, Richard Biener <rguenther@suse.de> wrote:
>> > On Wed, 14 Jan 2015, Prathamesh Kulkarni wrote:
>> >
>> >> On 14 January 2015 at 16:13, Kugan <kugan.vivekanandarajah@linaro.org> wrote:
>> >> > On 14/01/15 21:24, Prathamesh Kulkarni wrote:
>> >> >> On 14 January 2015 at 14:37, Richard Biener <rguenther@suse.de> wrote:
>> >> >>> On Wed, 14 Jan 2015, Prathamesh Kulkarni wrote:
>> >> >>>
>> >> >>>> Hi,
>> >> >>>> I am having an issue with placing includes of expr.h in gcc-plugin.h.
>> >> >>>> rtl.h is required to be included before expr.h, so I put it in gcc-plugin.h.
>> >> >>>> However the front-ends then fail to build because rtl.h is not allowed
>> >> >>>> in front-ends,
>> >> >>>> and the front-ends include gcc-plugin.h (via plugin.h).
>> >> >>>>
>> >> >>>> For instance ada/gcc-interface/misc.c failed to build with following error:
>> >> >>>> In file included from ../../gcc/gcc/gcc-plugin.h:64:0,
>> >> >>>>                  from ../../gcc/gcc/plugin.h:23,
>> >> >>>>                  from ../../gcc/gcc/ada/gcc-interface/misc.c:53:
>> >> >>>> ../../gcc/gcc/rtl.h:20:9: error: attempt to use poisoned "GCC_RTL_H"
>> >> >>>>
>> >> >>>> However rtl.h is required to be included before expr.h, so we cannot skip
>> >> >>>> including rtl.h in gcc-plugin.h. How do we get around this ?
>> >> >>>> As a temporary hack, could we #undef IN_GCC_FRONTEND in gcc-plugin.h ?
>> >> >>>> java/builtins.c does this to include expr.h.
>> >> >>>
>> >> >>> Err - obviously nothing in GCC itself should include gcc-plugin.h,
>> >> >>> only plugins should.  Do we tell plugins that they should include
>> >> >>> plugin.h?!  Why is the include in there?
>> >> >>>
>> >> >>> I'd simply remove it....
>> >> >> That doesn't work.
>> >> >> For instance removing plugin.h include from c/c-decl.h resulted in
>> >> >> following build errors:
>> >> >> ../../gcc/gcc/c/c-decl.c: In function \u2018void finish_decl(tree,
>> >> >> location_t, tree, tree, tree)\u2019:
>> >> >> ../../gcc/gcc/c/c-decl.c:4990:27: error:
>> >> >> \u2018PLUGIN_FINISH_DECL\u2019 was not declared in this scope
>> >> >> ../../gcc/gcc/c/c-decl.c:4990:51: error:
>> >> >> \u2018invoke_plugin_callbacks\u2019 was not declared in this scope
>> >> >> ../../gcc/gcc/c/c-decl.c: In function \u2018void finish_function()\u2019:
>> >> >> ../../gcc/gcc/c/c-decl.c:9009:29: error:
>> >> >> \u2018PLUGIN_PRE_GENERICIZE\u2019 was not declared in this scope
>> >> >> ../../gcc/gcc/c/c-decl.c:9009:58: error:
>> >> >> \u2018invoke_plugin_callbacks\u2019 was not declared in this scope
>> >> >> make[3]: *** [c/c-decl.o] Error 1
>> >> >> make[2]: *** [all-stage1-gcc] Error 2
>> >> >> make[1]: *** [stage1-bubble] Error 2
>> >> >> make: *** [all] Error 2
>> >> >>
>> >> >> Why do the front-ends require to include plugin.h ?
>> >> >
>> >> >
>> >> > C/C++ Front-end seems to have callbacks to process declarations. Please
>> >> > look at https://gcc.gnu.org/ml/gcc-patches/2010-04/msg00780.html which
>> >> > added callback PLUGIN_FINISH_DECL.
>> >> Thanks for pointing it out!
>> >
>> > I meant to remove the gcc-plugin.h include from plugin.h.
>> oops, sorry. However that results in the following build errors:
>> http://pastebin.com/K0hFJwJ3
>
> Well, obviously plugin.h includers need to be fixed with respect to
> that "flattening".
yeah right -;) sorry for the noise.
>
> Richard.
>
>> Thanks,
>> Prathamesh
>> >
>> > Richard.
>> >
>> >> Regards,
>> >> Prathamesh
>> >> >
>> >> > Thanks,
>> >> > Kugan
>> >> >
>> >>
>> >>
>> >
>> > --
>> > Richard Biener <rguenther@suse.de>
>> > SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Jennifer Guild,
>> > Dilip Upmanyu, Graham Norton HRB 21284 (AG Nuernberg)
>>
>>
>
> --
> Richard Biener <rguenther@suse.de>
> SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Jennifer Guild,
> Dilip Upmanyu, Graham Norton HRB 21284 (AG Nuernberg)


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