[Gcl-devel] Re: PLT code and Mach-O

[Camm Maguire]

Greetings!  OK, could you both (i.e Vadim/Mike and Aurelien) please
try cvs, stable and/or head, now?

Should compile out of the box.  (compiler::link nil "foo") should work
for both of you.  LEADING_UNDERSCORE/GNU_LD should be autodetected.
Aurelien should get an empty si::*plt-table* -- don't know about
windows.

Please confirm/refute.

Take care,

"Vadim V. Zhytnikov" <address@hidden> writes:

> Camm Maguire ?????:
> > Greetings, and thanks!  Unfortunately, I've lost your output of the
> > original plt.h, but if I recall, the list below can be generated from
> > that one by 1) dropping one underscore
> > 2) dropping the hyperbolics
> > 3) also dropping main and alloca, which we do not need.
> > Right?  If so I'll shortly have a commit to test.
> >
> 
> Right.  Actually 2) is weaker - only _inverse_
> hyperbolic make some trouble.
> 
> > Take care,
> > "Vadim V. Zhytnikov" <address@hidden> writes:
> >
> >>Camm Maguire writes:
> >>
> >>>Greetings.  Basically yes, but for clarity:
> >>>=============================================================================
> >>>g.c
> >>>=============================================================================
> >>>typedef struct {
> >>>  const char *n;
> >>>  unsigned long ad;
> >>>} Plt;
> >>>#include <math.h>
> >>>static Plt mplt[]={{"cos",(unsigned long)(void *)cos}};
> >>>int
> >>>main() {
> >>>  return 0;
> >>>}
> >>>=============================================================================
> >>>gcc -g -Wall -c g.c -o g.o
> >>>g.c:7: warning: `mplt' defined but not used
> >>>=============================================================================
> >>
> >>It works exactly this way.
> >>(
> >>
> >>>Thanks for your help with this!
> >>>Take care,
> >>
> >>Here is plt.h which makes plt.o happy
> >>=====================================
> >>MY_PLT(main),
> >>MY_PLT(alloca),
> >>MY_PLT(_setjmp),
> >>MY_PLT(acos),
> >>/*MY_PLT(acosh),*/
> >>MY_PLT(asin),
> >>/*MY_PLT(asinh),*/
> >>MY_PLT(atan),
> >>/*MY_PLT(atanh),*/
> >>MY_PLT(cos),
> >>MY_PLT(cosh),
> >>MY_PLT(exp),
> >>MY_PLT(getc),
> >>MY_PLT(log),
> >>MY_PLT(putc),
> >>MY_PLT(sin),
> >>MY_PLT(sinh),
> >>MY_PLT(tan),
> >>MY_PLT(tanh)
> >>======================================
> >>I commented out three inverse hyperbolic
> >>functions since something weird is hapenning
> >>to them. There is a comment in math.h
> >>======================================
> >>/*
> >>  * TODO: asinh, acosh, atanh
> >>  */
> >>======================================
> >>
> >>
> >>
> >>>"Vadim V. Zhytnikov" <address@hidden> writes:
> >>>
> >>>
> >>>>Camm Maguire ?????:
> >>>>
> >>>>
> >>>>>Greetings!
> >>>>>"Vadim V. Zhytnikov" <address@hidden> writes:
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Camm Maguire:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>>Greetings!
> >>>>>>
> >>>>>><snip>
> >>>>>>
> >>>>>>>The last possibility is that we put in some configure magic to skip
> >>>>>>>the plt stuff on windows and macosx.  I don't like this much, as I
> >>>>>>>fear that eventually the binutils change will catch up there too.
> >>>>>>
> >>>>>>I was about to propose this as a temporary solution for 2.6.2 release.
> >>>>>>The problem sounds too serious to make serious improvements in a hurry.
> >>>>>>On the other hand I'd to see 2.6.2 released really soon.
> >>>>>>Thank to Camm we now have a fix for Linux - at present the only
> >>>>>>system where problem with new binutils shows up.
> >>>>>>Further investigation and improvement could be moved to 2.7.X
> >>>>>>and if more robust scheme will be found it the we can release
> >>>>>>2.6.3.
> >>>>>
> >>>>>This is possible, but before deciding, could we briefly pursue 2
> >>>>>questions:
> >>>>>1) Do we know what happens on mingw with binutils .8?  Can we find
> >>>>>out
> >>>>>  if not?
> >>>>>2) Could you or Mike try to compile that simple little test with
> >>>>>'cos'
> >>>>>  only, let me know if it works, and why not if not?
> >>>>
> >>>>Do you mean plttest.c with just one cos(d) call?
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>I don't want to spend a lot of time either, but these should be quick
> >>>>>I'm hoping.  I'd like to have the greatest possible chance of never
> >>>>>having to look back at the 2.6 series.
> >>>>>Take care,
> >>>>
> 
> 
> -- 
>       Vadim V. Zhytnikov
> 
>        <address@hidden>
>       <address@hidden>
> 
> 
> 
> 

-- 
Camm Maguire                                            address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah