Experimental Physics and
Industrial Control System

"Ernest L. Williams" <[email protected]> · Thu, 6 Aug 2009 07:34:18 -0700

Hi Mark,

Must be the difference between your compilers.

You have a slightly newer compiler on the other system.

Also, one machine is a 64-bit OS the other is not.  That should be okay.
Thanks,
Ernest

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Mark Rivers
Sent: Thursday, August 06, 2009 5:55 AM
To: [email protected]
Subject: Linux question

Folks,

This is not exactly an EPICS-specific question, but I'm having trouble
running EPICS binaries built on one recent Linux system on another recent
Linux system.  It just gives a "command not found" error, which is not very
helpful.  Both systems are Fedora 64-bit; the binary is built with
HOST_ARCH=linux-x86, e.g. 32-bit.

Here is an example.  I am trying to run a soft IOC in the current directly.
First I run "file" and "ldd" on it, then try to run it:

[epics@localhost linux-x86]$ file ./simDetectorApp
./simDetectorApp: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV),
dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped

[epics@localhost linux-x86]$ ldd ./simDetectorApp
        not a dynamic executable

[epics@localhost linux-x86]$ ./simDetectorApp
./simDetectorApp: Command not found.

Note that ldd says this is not a dynamic executable, which is incorrect.

Here is the version information on the system where the binary was built and
where the executable resides:

corvette:1-5beta/ADApp/simDetectorSrc>more /proc/version 
Linux version 2.6.27.21-78.2.41.fc9.i686 (mockbuild@) (gcc version 4.3.0
20080428 (Red Hat 4.3.0-8) (GCC) ) #1 SMP Mon Mar 23 23:45:58 EDT 2009

Here is the version information on the system that will not run the binary:
[epics@localhost linux-x86]$ more /proc/version 
Linux version 2.6.27.25-170.2.72.fc10.x86_64
([email protected]) (gcc version 4.3.2 20081105 (Red Hat
4.3.2-7) (GCC) ) #1 SMP Sun Jun 21 18:39:34 EDT 2009

If I run "file" and "ldd" on the file on the system that builds it and runs
it OK I get the following:

corvette:1-5beta/bin/linux-x86>file simDetectorApp 
simDetectorApp: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV),
dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped

corvette:1-5beta/bin/linux-x86>ldd simDetectorApp 
        linux-gate.so.1 =>  (0x0035b000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x003b3000)
        libreadline.so.5 => /lib/libreadline.so.5 (0x05ac2000)
        libncurses.so.5 => /lib/libncurses.so.5 (0x05f3b000)
        librt.so.1 => /lib/librt.so.1 (0x004c8000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x066c5000)
        libm.so.6 => /lib/libm.so.6 (0x00363000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x066b5000)
        libc.so.6 => /lib/libc.so.6 (0x004d2000)
        /lib/ld-linux.so.2 (0x001d8000)
        libtinfo.so.5 => /lib/libtinfo.so.5 (0x05c57000)
        libdl.so.2 => /lib/libdl.so.2 (0x0038e000)
corvette:1-5beta/bin/linux-x86>./simDetectorApp 

Any idea what could be wrong?

Thanks,
Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System