[Vm-dev] help with autoconf...

[Eliot Miranda]

On Wed, Apr 22, 2009 at 1:04 PM, Bert Freudenberg <bert at freudenbergs.de>wrote:

>
>
> On 22.04.2009, at 21:58, Eliot Miranda wrote:
>
>
>> Actually, no. -fno-omit-frame-pointer seems to *force* a frame pointer
>> even on platforms that by default have none ... or is that what you need?
>>
>
> Right.  Somewhere (and I haven't found out where) the autoconf
> configuration decides to apply -fomit-frame-pointer, which is fine as it
> generates faster code, etc.
>
>
> platforms/unix/config/acinclude.m4
>
> If you change any of the autoconf stuff remember to run autoconf to
> regenerate the configure script.
>
> But I need (actually, want; I could work around, but shouldn't have to)  a
> frame pointer for one file, and a subsequent -fno-omit-frame-pointer will
> override a preceeding -fomit-frame-pointer with the compilers I'm aware of.
>
>
> Good.
>
>
>>  My problem, however, is how to get autoconf to generate a specific
>> compile rule for one file.  I can define the alternative COMPILEALT macro
>> but I can't yet figure out how to spit out that rule for a specific source
>> file withoput hacking it at the wrong place.  But I'm getting closer :/
>>
>>
>> Assuming you put it in the vm directory,
>> hacking platforms/unix/vm/Makefile.in should do it, no?
>>
>
> Thanks for the suggestion!  tried it but no.  So I think I have to
> duplicate the ${srcs} collection and processing in mkmf.
>
>
> I meant to add a line for your file
>
> myCogFile$o : myCogFile.c
> $(COMPILE)  -fomit-frame-pointer $@ myCogFile.c
>

Close but because COMPILE ends in "...-c -o" one can't write
 cogit$o : cogit.c
$(COMPILE)  -fno-omit-frame-pointer cogit$o $(srcdir)/vm/cogit.c


>
> - Bert -
>
>
>
>
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