On Wed, 27 Apr 2011 15:13:21 +0200, Geoff wrote in message
<1303910001.6472.18.camel@DELL02>:
> Hi Arnt,
>
> WARNING: Again read to the bottom BEFORE replying!!!
..if you bother to try that approach with my post to the list,
you may see I addressed the list with this implied question:
In file included from component.cxx:4:0:
component.hxx:191:28: error: reference ‘_table_manager’ cannot be
declared ‘mutable’ [-fpermissive]
..which I don't yet know how to fix.
> > contour_tree.hxx: In member function ‘void
> > TGContourNode::remove_kid(int)’: contour_tree.hxx:73:12:
> > error: ‘NULL’ was not declared in this scope
>
> You know this will get quite BORING if you keep telling
> us about gcc 4.6 problems, if it is in fact a gcc
> problem...
>
> And the other error looks like a similar idea of what was
> ok yesterday is not ok today ;=)) I, and presumably many
> others, simply do not have the problem, yet!
..then don't bother.
> > In file included from component.cxx:4:0:
> > component.hxx:191:28: error: reference ‘_table_manager’
> > cannot be declared ‘mutable’ [-fpermissive]
>
> Perhaps these problems should really be put on the gcc devel
> list, and/or the unix/linux standard header builders,
> but let's try to get to the heart of the matter...
>
> Just dealing with the case of the missing NULL...
>
> Is it that a definition of a NULL has been removed from
> some standard headers, or is it really just gcc/g++ being
> picky?
>
> In a quick review of /usr/include I can see quite a number
> of headers have their own solution :-
>
> #ifndef NULL
> #define NULL (void*)(0)
> #endif
>
> So maybe this is a case where NULL was previously being
> defined in some header TG/SG/FG that was included along
> with others... and all was happy.
>
> This is probably the reason no maintainer has added
> a 'fix' so far... Such an #ifndef NULL could be put
> in files like simgear_config.h and/or FG config.h
> to get past this problem... rather than trying to change
> every instance of NULL to 0...
>
> But is such a change really needed? Why?
> First is to exactly understanding the problem(s)...
>
> So do these problems persist in all versions of g++?
> Maybe one goes, one remains? Which? What?
>
> If they do persist for all g++ version then it is some
> header change you are facing in your distro... that would
> be really impossible to track down...
>
> A simple experiment
> 1. write the following to a file called say test2.cxx
>
> // =========================================
> #include <stdio.h>
> int main(int argc, char *argv[])
> {
> char * cp = NULL;
> #ifdef NULL
> printf("NULL is defined ok\n");
> #else
> printf("NULL is NOT defined\n");
> #endif
> }
> // =========================================
>
> 2. Compile it with simply -
> $ g++ test2.cxx
>
> Any problems?
>
> If it compiles there should be a executable
> a.out, which you can run with :-
> $ ./a.out
>
> I can compile this, and when I run it I get
> NULL is defined ok
>
> What do you get?
>
> Then you can remove the #include <stdio.h>
> by adding say :-
> // #include <stdio.h>
> or just delete the line...
>
> Now when I compile it I get AS EXPECTED -
> ~/projects/tests/test/test01$ g++ test2.cxx
> test2.cxx: In function ‘int main(int, char**)’:
> test2.cxx:5: error: ‘NULL’ was not declared in this scope
> test2.cxx:9: error: ‘printf’ was not declared in this scope
> ~/projects/tests/test/test01$
>
> So that shows me in my case, including <stdio.h>
> defines a NULL for me, as well as 'printf'... all of
> which suggests it is NOT a g++ version issue at all.
>
> But your 2nd error may be g++ version related, but let
> us deal with ONE thing at a time...
>
> And as usual, I would have to state, these have nothing
> whatsoever to do with the script!!! Even given your
> personal modification of same to re-use git SG instead
> of mapserver simgear-cs. When it is confirmed that this
> is now ok
..if you're not interested in that confirmation, fine.
> - in the not so recent past it was not - I too
> will modify it to re-use git SG...
>
> And I sent you a nice thanks for the suggestion, with lots
> of other, I hope, interesting tit-bits, only to get back
> RUBBISH. 80-90% of my own email, with comments cut into it
> every few paragraphs. That email has be trashed ;=()
>
> And I will continue to TRASH SUCH TRASH ;=((
>
> Anyway, HTH.
>
> Regards,
> Geoff.
>
>
>
..it didn't.
--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.
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