Solaris CC - could not open file "ir.out"

I am trying to build an C++ program (Tuxedo server) which I have inherited.

I get the following error:

Could not open file "ir.out"
SunWS_cache: Error: Error occurred in invoked compiler, exit status = 1(2).  Aborting....
CMDTUX_CAT:1832: ERROR: can't execute CC -w -w  -D_REENTRANT -mt -R/usr/lib/lwp   -I$TUXDIR/include -o

The compiler is /app/SUNWspro/WS6U1/bin/cc

There was an old ir.out of 0 blocks. I get the same error if I remove this.

I would appreciate any pointers as to whether e.g. this is an environmental problem.
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efnConnect With a Mentor Commented:
I don't know what the real problem is, but I have encountered the same problem and I can give you a workaround that worked for me.

Rig it so the link will fail with an unresolved reference.  In my case, I delete a source file from the list in the makefile and rebuild.  The method may be different in your case.

Then restore whatever was missing and build again.  This makes the ir.out error magically disappear.  At least, it does for me.

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