Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 07 Sep 2006 17:37:53 -0500

Hi David,
Welcome to the EPICS community.
David Eisert wrote:

I am trying to build 3.14.8.2 on QNX 6.1 (GCC version 2.95.2). We are
currently running our control system

under QNX. The migration plan is to have EPICS and our current control
software running side by side in our

IOCs.

You're going to have to port EPICS to QNX then, since we don't have the
operating system interface for that OS in Base. There may not be too
much work needed to do this, but it will take some effort.
Unfortunately the build is failing in resourceLib.h. I noticed
that the code near the error has a problem on

some systems and it has been conditionally removed.

In the build output that you presented though the problem is with the
build for the host machine though, not the QNX cross-compile. You said:
I am building it using the
linux-x86 host architecture. So far only small changes

have been needed. QNX is supposed to be POSIX compliant. Any ideas?

The part of the error message I'm interested in is this:
make[3]: *** [fdmgr.o] Error 1

make[3]: Leaving directory
`/home/Epics/base-3.14.8.2/src/libCom/O.linux-x86'

This tells me that the build failed while it was trying to compile code
that will run on Linux, not code that will run on QNX (which would have
been an error from inside some libCom/O.qnx-XXX directory). The EPICS
build system was designed to compile multiple architectures
simultaneously alongside themselves, and the O.linux-x86 directory tells
me that the error was reported while building code for linux. You
actually *have* to be able to compile code for the host architecture as
well as for the target architecture, since there are programs in the
early parts of the build that are run while building later parts of the
code, thus you must have a host compiler as well as the cross-compiler
present to build EPICS.
Please post the output from the following command:

/usr/bin/g++ --version

This should *not* be your QNX cross-compiler, it must be the compiler
for the host Linux operating system. What Linux distribution are you
building this on?
- Andrew
--
There is considerable overlap between the intelligence of the smartest
bears and the dumbest tourists -- Yosemite National Park Ranger

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System