Add --with-lg-tiny-min, generalize --with-lg-quantum.

include/jemalloc/internal/jemalloc_internal.h.in

@@ -181,7 +181,6 @@ typedef unsigned index_t;
     (((unsigned)(flags >> 8)) - 1)
 
 /* Smallest size class to support. */
-#define	LG_TINY_MIN		3
 #define	TINY_MIN		(1U << LG_TINY_MIN)
 
 /*

include/jemalloc/internal/jemalloc_internal_defs.h.in

@@ -144,6 +144,9 @@
 /* Support lazy locking (avoid locking unless a second thread is launched). */
 #undef JEMALLOC_LAZY_LOCK
 
+/* Minimum size class to support is 2^LG_TINY_MIN bytes. */
+#undef LG_TINY_MIN
+
 /*
  * Minimum allocation alignment is 2^LG_QUANTUM bytes (ignoring tiny size
  * classes).

include/jemalloc/internal/size_classes.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Usage: size_classes.sh <lg_parr> <lg_g>
+# Usage: size_classes.sh <lg_qarr> <lg_tmin> <lg_parr> <lg_g>
 
 # The following limits are chosen such that they cover all supported platforms.
 
@@ -8,19 +8,19 @@
 lg_zarr="2 3"
 
 # Quanta.
-lg_qarr="3 4"
+lg_qarr=$1
 
 # The range of tiny size classes is [2^lg_tmin..2^(lg_q-1)].
-lg_tmin=3
+lg_tmin=$2
 
 # Maximum lookup size.
 lg_kmax=12
 
 # Page sizes.
-lg_parr=`echo $1 | tr ',' ' '`
+lg_parr=`echo $3 | tr ',' ' '`
 
 # Size class group size (number of size classes for each size doubling).
-lg_g=$2
+lg_g=$4
 
 pow2() {
   e=$1