add VIPS_EXEEXT to the exported API

EXEEXT was just internal, now it's part of the API we export

ChangeLog

@@ -66,6 +66,7 @@
 - added im_aconv(), approximate convolution
 - bumped smalltile to 512x512 for testing
 - added VipsPool, got rid of floating refs again, argh
+- VIPS_EXEEXT is now part of the exported API
 
 30/11/10 started 7.24.0
 - bump for new stable

configure.in

@@ -189,9 +189,12 @@ expand () {
 expand $libdir
 VIPS_LIBDIR=$expanded_value
 
+# this gets pasted into version.h as a #define
+VIPS_EXEEXT=$EXEEXT
+AC_SUBST(VIPS_EXEEXT)
+
 # vips.c/im_guess_prefix.c need to know the exe suffix and (as a fallback)
 # the configure-time install prefix
-AC_DEFINE_UNQUOTED(VIPS_EXEEXT,"$EXEEXT",[extension for executable files])
 AC_DEFINE_UNQUOTED(VIPS_PREFIX,"$prefix",[configure-time install prefix])
 AC_DEFINE_UNQUOTED(VIPS_LIBDIR,"$VIPS_LIBDIR",[configure-time library directory])
 

libvips/convolution/im_aconv.c

@@ -58,27 +58,23 @@ user	9m34.700s
 sys	0m1.500s
 
 $ time vips im_aconv img_0075.jpg x.v g2d201.con 10 10
-real	0m4.877s
-user	0m7.490s
-sys	0m0.220s
+real	0m3.151s
+user	0m5.640s
+sys	0m0.100s
 
 $ vips im_subtract x.v x2.v diff.v
 $ vips im_abs diff.v abs.v
 $ vips im_max abs.v
 2.70833
 
-	- clustering could be much faster
-
-	- add more bandfmt
-
   	- are we handling mask offset correctly?
 
  */
 
 /*
+ */
 #define DEBUG
 #define VIPS_DEBUG
- */
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
@@ -303,7 +299,6 @@ boxes_break( Boxes *boxes )
 	double max;
 	double min;
 	double depth;
-	double sum;
 	int layers_above;
 	int layers_below;
 	int z, n, x, y;
@@ -764,8 +759,8 @@ typedef struct {
 
 	int last_stride;	/* Avoid recalcing offsets, if we can */
 
-	/* The rolling sums. int for integer types, 
-	 * double for floating point types.
+	/* The rolling sums. int for integer types, double for floating point 
+	 * types.
 	 */
 	void *sum;		
 } AConvSequence;

libvips/include/vips/version.h.in

@@ -10,4 +10,9 @@
 #define VIPS_MINOR_VERSION	(@VIPS_MINOR_VERSION@)
 #define VIPS_MICRO_VERSION	(@VIPS_MICRO_VERSION@)
 
+/* Not really anything to do with versions, but this is a handy place to put
+ * it.
+ */
+#define VIPS_EXEEXT "@VIPS_EXEEXT@"
+
 #endif /*VIPS_VERSION_H*/