NDOUtils on x86_64 Compile Error
Andreas Ericsson
ae at op5.se
Thu Nov 9 16:44:00 CET 2006
Giles Coochey wrote:
>> Try:
>>
>> ./configure --build=i386 --host=i386 --libdir=/usr/lib32
>> CFLAGS="-fPIC"
>>
>> Then "make" and you go.
>>
>
> Sorry - replying to my own post, I reached those by experimentation, and
> now find that:
>
> ./configure CFLAGS="-fPIC"
>
> Works just the same.
>
I would imagine they should. The other flags will almost certainly be
autodetected as required.
I would expect nearly all module code to require either -fpic or -fPIC
to be defined. The option flag is an acronym for Position Independent
Code, meaning the linker shouldn't try to make assumptions on where
function pointers inside the resulting module should reside based on
their relative position to anything else in the object-code. -fPIC
implies -mlarge-data and should be used to generate pic code where any
of its segments are above a certain threshold in size (generally 64KiB
on x86). -fpic generally makes for smaller and faster code, but can't be
used when any of the structures pulled from the "mother-ship" (the
program loading the module) is larger than the architecture-specific
threshold for "one code-page". -fpic implies -msmall-data.
What happens if you use "CFLAGS=-fpic" instead? If it works, it should
create binaries that run slightly faster and with a smaller memory
footprint, although with the constraints mentioned above.
On a side-note, being able to write emails on a train isn't necessarily
a good thing. The amount of junk output one produces when bored is
nothing short of astonishing.
--
Andreas Ericsson andreas.ericsson at op5.se
OP5 AB www.op5.se
Tel: +46 8-230225 Fax: +46 8-230231
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