[etherlab-users] Cross Compile for ARM

[Thomas Bitsky Jr]

Following up on my previous email, I think the "make modules_install" command is trying to install to the host system, not the file system I'm specifying as the target directory.

This is everything I've done so far:

export PROJECT=openctl
export PRJROOT=/home/tbj/srcroot/${PROJECT}
export PRJAT91=${PRJROOT}/at91
export PRJAT91_KERNEL=${PRJAT91}/kernel/3.2.46-rt67
export PRJAT91FS=${PRJAT91}/rootfs

echo Setup the compiler for cross-compilation
unset ARCH
ARCH=arm
export GYP_DEFINES="target_arch=arm"
export CC=arm-linux-gcc
export CXX=arm-linux-g++
export AR=arm-linux-ar
export CC_host=gcc
export CXX_host=g++



./configure --prefix=$PRJAT91FS/opt --with-linux-dir=$PRJAT91_KERNEL/headers --enable-generic=yes --enable-8139too=no --host=i386 --target=arm-none-linux-gnueabi-

make clean

make DESTDIR=$PRGAT91FS ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi-

make modules DESTDIR=$PRGAT91FS ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi-
make install ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- DESTDIR=$PRGAT91FS

No problems until:
Make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- DESTDIR=$PRGAT91FS INSTALL_MOD_PATH=$PRGAT91FS modules_install

...
An endless list of warnings....
...
FATAL: Could not open /lib/modules/3.2.46-rt67/modules.dep.temp for writing: Permission denied
make[1]: *** [_emodinst_post] Error 1
make[1]: Leaving directory `/home/tbj/srcroot/openctl/at91/kernel/3.2.46-rt67/headers'

Can anyone see what I'm doing wrong?

Thomas C. Bitsky Jr. | Lead Developer
ADC | automateddesign.com<http://automateddesign.com/>
P: 630-783-1150 F: 630-783-1159 M: 630-632-6679

From: Gavin Lambert [mailto:gavinl at compacsort.com]
Sent: Thursday, June 27, 2013 5:34 PM
To: Thomas Bitsky Jr; etherlab-users at etherlab.org
Subject: RE: [etherlab-users] Cross Compile for ARM

IIRC, the --with-linux-dir option cannot cope with relative paths nor ~ prefixed paths.  Specify the absolute path from / instead.

From: etherlab-users-bounces at etherlab.org<mailto:etherlab-users-bounces at etherlab.org> [mailto:etherlab-users-bounces at etherlab.org] On Behalf Of Thomas Bitsky Jr
Sent: Thursday, 27 June 2013 13:41
To: etherlab-users at etherlab.org<mailto:etherlab-users at etherlab.org>
Subject: [etherlab-users] Cross Compile for ARM


I'm trying to cross-compile the EtherCAT master for an ARM board. I successfully built a Linux RT Prempt kernel for the device.  On my development machine, the source tree where I built the kernel is at: ~/srcroot/linux/linux-3.2.46

I moved into the EtherLAB directory and issued:

./configure --host=arm-linux --enable-generic --with-linux-dir=~/srcroot/linux/linux-3.2.46

The result is:

No configured Linux kernel sources in ~/srcroot/linux/linux-3.2.46/

But I just built a kernel there. Is there something I have to do to the source tree to get it ready to build the ethercat master?

Thanks in advance,
Tome

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