On Thursday 24 July 2008 06:22:59 Darren Hart wrote:
> 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.
Unfortunately this breaks build on i586:
+ make -C testcases/realtime/
make: Entering directory
`/usr/src/packages/BUILD/ltp-full-20080820/testcases/realtime'
make[1]: Entering directory
`/usr/src/packages/BUILD/ltp-full-20080820/testcases/realtime/lib'
cc -march=i586 -mtune=i686 -fmessage-length=0 -Wall -D_FORTIFY_SOURCE=2
-fstack-protector -O2 -g -Wall -m64 -Wall -m64 -I../include -D_GNU_SOURCE -c -o
libjvmsim.o libjvmsim.c
libjvmsim.c:1: sorry, unimplemented: 64-bit mode not compiled in
make[1]: *** [libjvmsim.o] Error 1
What about adding -m64 only for ppc?
best regards,
Daniel
---
diff --git a/testcases/realtime/config.mk b/testcases/realtime/config.mk
index 083db58..046bd93 100644
--- a/testcases/realtime/config.mk
+++ b/testcases/realtime/config.mk
@@ -23,4 +23,7 @@ LDLIBS += $(srcdir)/lib/libjvmsim.o \
$(srcdir)/lib/libstats.o \
-lpthread -lrt -lm
-CFLAGS += -m64
+ifeq ($(shell uname -m), ppc)
+ CFLAGS += -m64
+endif
+
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