auxiliarySoftware/SuiteSparse: update naming of EMPTY macro

The macro `EMPTY` is defined in multiple solvers in the
auxiliarySoftware/SuiteSparse common package. This can cause issues with
other software, as in trilinos#11630 for example which builds with cuda/11.4 and
includes cub files that define a static variable of the same name

This PR renames the EMPTY macro defined in the following
places:
* AMD/Include/trilinos_amd_internal.h
* BTF/Include/trilinos_btf_internal.h
* CAMD/Include/trilinos_camd_internal.h
* CHOLMOD/Include/amesos_cholmod_internal.h
* KLU/Include/trilinos_klu_internal.h
* CCOLAMD/Source/trilinos_ccolamd.c
* CCOLAMD/Source/trilinos_ccolamd_l.c
* COLAMD/Source/trilinos_colamd.c
* COLAMD/Source/trilinos_colamd_l.c

and updates the usage of that macro in the corresponding source code

Note: The PARAKLETE solver includes amesos_cholmod_internal.h from which
it received its definition of EMPTY; in the PARAKLETE source code I
renamed the use of EMPTY to follow the cholmod naming convention, TRILINOS_CHOLMOD_EMPTY

packages/common/auxiliarySoftware/SuiteSparse/src/AMD/Include/trilinos_amd_internal.h

@@ -101,8 +101,8 @@
 #undef MIN
 #endif
 
-#ifdef EMPTY
-#undef EMPTY
+#ifdef TRILINOS_AMD_EMPTY
+#undef TRILINOS_AMD_EMPTY
 #endif
 
 #ifdef GLOBAL
@@ -114,12 +114,12 @@
 #endif
 
 /* FLIP is a "negation about -1", and is used to mark an integer i that is
- * normally non-negative.  FLIP (EMPTY) is EMPTY.  FLIP of a number > EMPTY
+ * normally non-negative.  FLIP (TRILINOS_AMD_EMPTY) is TRILINOS_AMD_EMPTY.  FLIP of a number > TRILINOS_AMD_EMPTY
  * is negative, and FLIP of a number < EMTPY is positive.  FLIP (FLIP (i)) = i
- * for all integers i.  UNFLIP (i) is >= EMPTY. */
-#define EMPTY (-1)
+ * for all integers i.  UNFLIP (i) is >= TRILINOS_AMD_EMPTY. */
+#define TRILINOS_AMD_EMPTY (-1)
 #define FLIP(i) (-(i)-2)
-#define UNFLIP(i) ((i < EMPTY) ? FLIP (i) : (i))
+#define UNFLIP(i) ((i < TRILINOS_AMD_EMPTY) ? FLIP (i) : (i))
 
 /* for integer MAX/MIN, or for doubles when we don't care how NaN's behave: */
 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
@@ -141,7 +141,7 @@
 #define FALSE (0)
 #define PRIVATE static
 #define GLOBAL
-#define EMPTY (-1)
+#define TRILINOS_AMD_EMPTY (-1)
 
 /* Note that Linux's gcc 2.96 defines NULL as ((void *) 0), but other */
 /* compilers (even gcc 2.95.2 on Solaris) define NULL as 0 or (0).  We */

packages/common/auxiliarySoftware/SuiteSparse/src/AMD/Source/trilinos_amd_1.c

@@ -81,7 +81,7 @@ GLOBAL void TRILINOS_AMD_1
     ASSERT (iwlen >= pfree + n) ;
 
 #ifndef NDEBUG
-    for (p = 0 ; p < iwlen ; p++) Iw [p] = EMPTY ;
+    for (p = 0 ; p < iwlen ; p++) Iw [p] = TRILINOS_AMD_EMPTY ;
 #endif
 
     for (k = 0 ; k < n ; k++)