+/* HAS_FLOCK_PROTO:
+ * This symbol, if defined, indicates that the system provides
+ * a prototype for the flock() function. Otherwise, it is up
+ * to the program to supply one. A good guess is
+ * extern int flock(int, int);
+ */
+/*#define HAS_FLOCK_PROTO / **/
+
+/* HAS_FP_CLASS:
+ * This symbol, if defined, indicates that the fp_class routine is
+ * available to classify doubles. Available for example in Digital UNIX.
+ * The returned values are defined in <math.h> and are:
+ *
+ * FP_SNAN Signaling NaN (Not-a-Number)
+ * FP_QNAN Quiet NaN (Not-a-Number)
+ * FP_POS_INF +infinity
+ * FP_NEG_INF -infinity
+ * FP_POS_NORM Positive normalized
+ * FP_NEG_NORM Negative normalized
+ * FP_POS_DENORM Positive denormalized
+ * FP_NEG_DENORM Negative denormalized
+ * FP_POS_ZERO +0.0 (positive zero)
+ * FP_NEG_ZERO -0.0 (negative zero)
+ */
+/*#define HAS_FP_CLASS / **/
+
+/* HAS_FPCLASS:
+ * This symbol, if defined, indicates that the fpclass routine is
+ * available to classify doubles. Available for example in Solaris/SVR4.
+ * The returned values are defined in <ieeefp.h> and are:
+ *
+ * FP_SNAN signaling NaN
+ * FP_QNAN quiet NaN
+ * FP_NINF negative infinity
+ * FP_PINF positive infinity
+ * FP_NDENORM negative denormalized non-zero
+ * FP_PDENORM positive denormalized non-zero
+ * FP_NZERO negative zero
+ * FP_PZERO positive zero
+ * FP_NNORM negative normalized non-zero
+ * FP_PNORM positive normalized non-zero
+ */
+/*#define HAS_FPCLASS / **/
+
+/* HAS_FPCLASSIFY:
+ * This symbol, if defined, indicates that the fpclassify routine is
+ * available to classify doubles. Available for example in HP-UX.
+ * The returned values are defined in <math.h> and are
+ *
+ * FP_NORMAL Normalized
+ * FP_ZERO Zero
+ * FP_INFINITE Infinity
+ * FP_SUBNORMAL Denormalized
+ * FP_NAN NaN
+ *
+ */
+/*#define HAS_FPCLASSIFY / **/
+
+/* HAS_FPCLASSL:
+ * This symbol, if defined, indicates that the fpclassl routine is
+ * available to classify long doubles. Available for example in IRIX.
+ * The returned values are defined in <ieeefp.h> and are:
+ *
+ * FP_SNAN signaling NaN
+ * FP_QNAN quiet NaN
+ * FP_NINF negative infinity
+ * FP_PINF positive infinity
+ * FP_NDENORM negative denormalized non-zero
+ * FP_PDENORM positive denormalized non-zero
+ * FP_NZERO negative zero
+ * FP_PZERO positive zero
+ * FP_NNORM negative normalized non-zero
+ * FP_PNORM positive normalized non-zero
+ */
+/*#define HAS_FPCLASSL / **/
+