Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 3 Nov 2015 17:18:33 -0600

Hi Lewis,

On 11/03/2015 04:49 PM, J. Lewis Muir wrote:
> EPICS Base 3.14.12.15 (+ Known Problems patches) fails to build
> fdmgr.cpp for ppc604 with the -O2 optimization flag using VxWorks 6.9.4,
> Workbench 3.3, and Utilities 1.0.  If I change the optimization flag to
> -O1, the build succeeds.

Have you tried compiling your IOCs for the vxWorks-ppc32 target instead
of vxWorks-ppc604? That is a universal 32-bit PowerPC target introduced
in VxWorks 6.x, the binaries of which can be loaded by any MVME2100,
MVME2700, MVME5100 and MVME6100 board (basically all the PowerPC boards
I support here except for the MVME3100 which needs the vxWorks-ppc32sf
target instead). That's the target which the APS Controls and BCDA
groups now use for VxWorks 6.9.4 targets, and we don't see this build
problem.

However if you really do need to build that target, it is possible to
change the compiler optimization settings for just one source file, take
a look at the base/src/cas/build/Makefile for an example where we had to
do that in the past. In your case you would edit
base/src/libCom/Makefile and add the line
    fdmgr_CXXFLAGS_vxWorks-ppc604 = -O1
to it somewhere between the two include lines. The result should compile
everything else with default optimization, and the fdmgr.cpp file with -O1.

HTH,

- Andrew

-- 
Light thinks it travels faster than anything but it is wrong.
No matter how fast light travels, it finds the darkness has
always got there first, and is waiting for it.
    -- Terry Pratchett, Reaper Man

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System