Re: Build failure under QNX 6.1

[Andrew Johnson <anj@aps.anl.gov>]

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