[Vm-dev] help with autoconf...
Eliot Miranda
eliot.miranda at gmail.com
Wed Apr 22 20:48:32 UTC 2009
On Wed, Apr 22, 2009 at 1:43 PM, Bert Freudenberg <bert at freudenbergs.de>wrote:
>
>
> On 22.04.2009, at 22:41, Eliot Miranda wrote:
>
>
>
> 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 $(srcdir)/vm/cogit.c
>
>
> how about
>
> cogit$o : cogit.c
> $(COMPILE) cogit$o -fno-omit-frame-pointer $(srcdir)/vm/cogit.c
>
Perfect. Thanks.
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