Error while cross-compiling EPICS for arm

[éæç <yanyingbing@sinap.ac.cn>]

Hi,

I have been working with cross-compiling EPICS for arm, but the ioc
application can't run on the target.

Building EPICS for linux-arm on the host
====================================
1.  Install a suitable cross compiler.  This release was built with a
version 
of gcc 3.3.3 configured as a cross compiler with prefix arm-linux.  Let
ARM_LINUX_GCC be the root of the compiler, so that GCC is available as
$ARM_LINUX_GCC/bin/arm-linux-gcc.

2.  Extract EPICS from
    http://www.aps.anl.gov/epics/download/base/baseR3.14.8.2.tar.gz into
a 
suitable directory.  Let EPICS_BASE be the path to the root directory of
this 
distribution.

3.  Apply the patch thus:
    $ cd $EPICS_BASE
    $ patch -p0 <$LIBERA_EPICS/install/patch-epics-3.14.8.2

4.  Editing the site configuration file
    $EPICS_BASE/configure/os/CONFIG_SITE.linux-x86.linux-arm
and defining 
    GNU_DIR=<expansion of ARM_LINUX_GCC>

5.  Make sure that linux-arm is included as a cross compiler target
architecture, by editing
    $EPICS_BASE/configure/CONFIG_SITE
and defining 
    CROSS_COMPILER_TARGET_ARCHS=linux-arm

6.  Run make from $EPICS_BASE.  This will take a while...
    $ cd $EPICS_BASE
    $ make

Creating a example ioc application on the host
=================================
1.  mkdir <top>
    cd <top>

2.  $EPICS_BASE/bin/linux-x86/makeBaseApp.pl -t example myexample
    $EPICS_BASE/bin/linux-x86/makeBaseApp.pl -i -t example myexample
The following target architectures are available in base:
    linux-arm
    linux-x86
What architecture do you want to use? linux-arm

3.  Run make.
    $ make linux-arm

Run the ioc example on the target
=================================
1.  cd <top>/iocBoot/iocmyexample

2.  ../../bin/linux-arm/myexample st.cmd

The error appear:
../../bin/linux-arm/myexample: relocation
error: ../../bin/linux-arm/myexample: undefined symbol: pvar_func_asSub



What's wrong?



Thanks in advance

Yan Yingbing
SSRF BI group