Linux -> PPC cross-compile of the Motor Record

[Andy Foster <ajf@observatorysciences.co.uk>]

Dear All,

I recently tried compiling the latest version of the
Motor record (V5-2 for 3.14.4) using the Linux -> PPC cross-compiler
that I built from the GNU/Wind River sources available from the SNS site.

The compilation failed due to a compiler problem:

/export/home/ajf/tornado2.2/ppc/host/x86-linux/bin/ccppc -c   -D_POSIX_SOURCE
   -DCPU=PPC604  -DvxWorks -include /export/home/ajf/tornado2.2/ppc/target/h/vxWorks.h
   -ansi  -O3  -Wall     -mcpu=604 -mstrict-align -mlongcall -fno-implicit-templates
   -fno-builtin  -I. -I.. -I../../../include/os/vxWorks -I../../../include
   -I/export/home/ajf/epics3.14.4/base/include/os/vxWorks
   -I/export/home/ajf/epics3.14.4/base/include
   -I/export/home/ajf/tornado2.2/ppc/target/h  ../drvOms.cc
.../drvOms.cc: In function `int set_status(int, int)':
.../drvOms.cc:228: warning: `bool ls_active' might be used
                  uninitialized in this function
.../drvOms.cc:878:
    sorry, not implemented: `tree_list' not supported by dump_type
....
....

I eventually tracked down the problem
as being due to a change that was made to the GNU compiler between
gcc-2.95 and gcc-2.95.1. I have patched my copy of the SNS compiler
sources and this enabled me to compile successfully.

Interestingly, when cross-compiling from Solaris, using the
cross-compiler supplied with Tornado 2.2, this problem
does not occur. I can only assume then that the compiler which
Wind River supplies is being built from a slightly different set
of source files than the one on the SNS site.

I was also surprised that for the built compiler:

ccppc -v gives:

Reading specs from ./../lib/gcc-lib/powerpc-wrs-vxworks/gcc-2.96/specs
gcc version gcc-2.96 (2.96+) 19990621 AltiVec

which seems to indicate that the sources are from gcc-2.96, i.e. a release
which should have already included the patches that I had to apply.

If anyone else is having problems compiling the motor record and is
interested in the patched compiler code, I would be happy
to supply it.

Cheers,

Andy

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