Vidya, Actually you should set this variable to the root of the target board filesystem that either you're exporting via NFS for development.
For example, here's my setting:
export CROSS_COMPILE_PREFIX=/onq/davinci/workdir/filesys
Where filesys is a copy of the
/onq/software/montavista/pro/devkit/arm/v5t_le/target directory as per
montavista's instructions.
If you're not sure if it will work, you can look inside any *.la file in
the target file system under somewhere like <target>/usr/lib
At the bottom of the file is an entry telling libtool where it should be
looking for the library and if it has that environment variable then you're
set.
Also, more modern autoconf and automake expect the --build --host --target
options to be in the platform-vendor-os format.
For montavista, this is: armv5tl-montavista-linuxeabi
The only catch is that montavista named all of their cross tools with the
arm_v5t_le- prefix which won't be picked up by configure.
The easy solution to this is to make symlinks to all the cross tools under
/opt/montavista/pro/devkit/arm/v5t_le/bin with the proper prefix.
Although you could do this with a find/sed/ln -s combination, I just chose
to dump the file names to a script and use textpad's regex functionality to
generate the script.
I've attached the script to this email... for those reading from a listserv
list gmane or nabble, remember to change the extension to .sh because I
think they all default to .bin.
Remember to run the script in the
/opt/montavista/pro/devkit/arm/v5t_le/bin or whereever 'where
arm_v5t_le-gcc' points to.
Regards,
David
(See attached file: make_links.sh)
DAVID A. KONDRAD
Software Design Engineer
On-Q/Legrand
Telephone (800) 321-2343 x311
www.onqlegrand.com
<vidyadhara.talya
@wipro.com>
To
03/06/2008 10:59 <[EMAIL PROTECTED]>,
PM <directfb-dev@directfb.org>,
<[EMAIL PROTECTED]
vincidsp.com>
cc
Subject
RE: cross-compiling DirectFB and
others
Hi David
Thanks for the info.
You have mentioned to set the CROSS_COMPILE_PREFIX to root. Does this
apply for Windows environment too ? Montavista installs Cygwin and
actual montavista lies in the directory "/opt/montavista". So should I
set CROSS_COMPILE_PREFIX to "/" or "/opt/montavista" ?
Regards
Vidya.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Friday, March 07, 2008 3:18 AM
To: directfb-dev@directfb.org;
[EMAIL PROTECTED]
Subject: cross-compiling DirectFB and others
Greetings,
I've bounced this to both DirectFB Dev (which people trying to get it
working on davinci should hop over to) and the davinci open source list.
With the risk of sounding foolish, I admit that I've spent more and a
few hours trying to cross compile DirectFB among other things for the
montavista toolchain.
Most answers to fix this involve setting all the LDFLAGS and such.
I guess I should have read the docs better, because there is a variable
referenced in all of the libtool .la files that makes this extremely
easy:
CROSS_COMPILE_PREFIX
If you export this as your root filesystem path, cross compiles work
just fine.
This includes the frustrating "libtool picks up the wrong libs" issue.
Again, this is probably common knowledge, but if I overlooked it then
maybe some others did too.
Regards,
David
DAVID A. KONDRAD
Software Design Engineer
On-Q/Legrand
www.onqlegrand.com
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