more osx help

TODO

@@ -1,3 +1,8 @@
+- need some way to disable tests in test_formats if those load/save options
+  are not there
+
+  perhaps "vips fitsload" with no args should not set errno?
+
 - use vips_resize() in vipsthumbnail?
 
   should the sharpening filter be selectable?

test/Makefile.am

@@ -24,6 +24,6 @@ TESTS = \
 	test_threading.sh 
 
 clean-local: 
-	-rm -rf tmp
+	-rm -rf tmp-*
 	-rm -f *.pyc
 

test/variables.sh.in

@@ -1,5 +1,6 @@
 top_srcdir=@TOP_SRCDIR@
-tmp=$top_srcdir/test/tmp
+# we need a different tmp for each script since make can run tests in parallel
+tmp=$top_srcdir/test/tmp-$$
 test_images=$top_srcdir/test/images
 image=$test_images/IMG_4618.jpg
 mkdir -p $tmp