On Thu, 2008-07-24 at 05:06 +0530, Subrata Modak wrote:
> On Mon, 2008-07-21 at 15:57 +0200, Gilles Carry wrote:
> > Hi,
> >
> > When compiling powerpc binaries, gcc defaults to 32 bit.
> > To do some tests I needed to have a 64 bit binary.
> > Since I'm using realtime, I modified config.mk as below.
> > My questions: is there any official way to turn LTP in 64bit?
> > If not, what shall we do then? Should LTP default to 32 or native-arch bit?
>
> It should default to native-arch bit. I hope the Makefile(s) take care
> of that stuff automatically.
>
> > Shall we use something like: "if (uname -m) ..." or use a command line
> > option?
> > Any comment?
> >
> > Gilles.
> >
> >
> > diff --git a/testcases/realtime/config.mk b/testcases/realtime/config.mk
> > index 19ccddc..083db58 100644
> > --- a/testcases/realtime/config.mk
> > +++ b/testcases/realtime/config.mk
> > @@ -23,3 +23,4 @@ LDLIBS += $(srcdir)/lib/libjvmsim.o \
> > $(srcdir)/lib/libstats.o \
> > -lpthread -lrt -lm
> >
> > +CFLAGS += -m64
According to man gcc:
-m64
Generate code for a 32-bit or 64-bit environment. The 32-bit envi-
ronment sets int, long and pointer to 32 bits and generates code
that runs on any i386 system. The 64-bit environment sets int to
32 bits and long and pointer to 64 bits and generates code for
AMD's x86-64 architecture. For darwin only the -m64 option turns
off the -fno-pic and -mdynamic-no-pic options.
This seems like the right thing to do to me. Gilles, have you confirmed that
this doesn't break things on the x86_64 platforms?
No objection from me.
--
Darren
> >
>
> Since, this patch is involving RT tests, i would like to have a word
> from Darren 7 others.
>
> Regards--
> Subrata
>
> >
> >
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--
Darren Hart
Real-Time Linux Team Lead
IBM Linux Technology Center
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