Strange Compiler Errors

Today, I am getting a compiler error about some variables declared in the DC libraries:
 
line 33 : ERROR  R3000.LIB : Undefined global label qd_count
line 35 : ERROR  R3000.LIB : Undefined global label qd_isrflag
 
I get the same errors with DC v9.25 and v9.62.  And stop me if you've heard this before, but,
nothing has changed in the code. I simply opened the project and compiled it.
 
Copy/Paste from R3000.lib, DC 9.25:
 
/*** BeginHeader qd_init */
nodebug void qd_init(int iplevel);
xmem void qd_isrinit();
void qd_isr();
extern long qd_count[];
extern char qd_errorflags[];
extern char qd_isrflag;
/*** EndHeader */
long qd_count[2];
char qd_errorflags[2];
char qd_isrflag;
 
It's interesting that the variables are not listed in the BeginHeader comment. I thought that was a requirement.
 
But this has been working for years. Why now?
 
Steve