Re: [Gumstix-users] Hello.c Problem

[Dan T. <log...@gm...>]

I wrote this little guide the other day - just to remind me how to
cross compile things.  It might help you...

http://logicalgenetics.com/forums/viewtopic.php?t=3D1268

Dan

On 18/08/05, Bernard MONDAN <ber...@gm...> wrote:
> Hi,
>=20
> The compiler use a few phase when generating code. When you obtain
> your file hello.o, that mean you do not complete the compilation,
> beacause a file with a '.o'
> is a relocatble file. and not an executable file.
>=20
> Use this Makefile:
>=20
> BASE:=3D  /home/ber/GumStix       # The place where you have your cross c=
ompiler
> BIN:=3D   $(BASE)/gumstix-buildroot/build_arm/staging_dir/bin
> INC:=3D   $(BASE)/gumstix-buildroot/build_arm/staging_dir/include
> LIB:=3D   $(BASE)/gumstix-buildroot/build_arm/staging_dir/lib
>=20
> CC:=3D    $(BIN)/arm-linux-gcc
>=20
> CFLAGS:=3D        -v
>=20
> With this Makefile in the directory where you have your source file (hell=
o.c)
> you just have to type :
> $ make hello
>=20
> you will obtain an executable file hello that you can download on your
> gumstix board.
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
>=20
>=20
> 2005/8/18, Imran zafar <imr...@ya...>:
> > hi,
> >
> > I have tried to compile hello.c
> > It compiles nicely and creates a hello.o file. When i try to execute th=
is
> > file by ./hello.o it gives the error "Permission denied"
> >
> > My gumstix-buildroot is in /home directory
> >
> > Best
> > Imran
> >
> > ie...@di...> wrote:
> > Dave Hylands wrote:
> >
> > >Hi Imran,
> > >
> > >
> > >
> > >>I have build the gumstix-buildroot. At the end there is a warning lik=
e
> > this,
> > >>
> > >>
> > >
> > >Good news!
> > >
> > >
> > >
> > >>warning: Clock Skew detected, your build may be incomplete
> > >>
> > >>Is that normal?
> > >>
> > >>
> > >
> > >
> > >
> > thats usually due to source files residing on NFS mount, where the cloc=
k
> > on the build
> > box differs from the clock on the NFS mount host. Since make uses file
> > timestamps
> > to determine the need for a re-compile, you can have old files pass the
> > time-check
> > (depending upon the size and direction of the skew).
> >
> > Dunno if that pertains to your build env tho.
> >
> > FWIW. since make knows the skew (presumably by touching a file, then st=
at'g
> > its mod-time), it could de-ske w partly - but never completely - cuz it
> > cant know
> > the skew at the time of the previous (possibly uptodate) compile.
> >
> >
> > >Yeah - I see that too. It's a known issue with colinux. I haven't run
> > >into any problems related to it yet.
> > >
> > >It would only be a concern at all if you were actively developing
> > >source files, and even then I haven't seen any issues.
> > >
> > >I believe that it's fixed in the development builds, but since my
> > >colinux install seems to be working for what I want it to, I've
> > >decided to leave well enough alone :)
> > >
> > >
> > >
> >
> >
> >
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>=20
>=20
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>=20


--=20
Dan Taylor

Software Development Engineer, JTL Systems Ltd
PhD Student, Reading University, UK

http://www.logicalgenetics.com