The test to detect stat64 in the configure script for pv version 1.5.7
is incorrect. Googling around found the following patch at:

  http://www.ivarch.com/programs/pv.shtml

This is the home page for pv, so they are already aware of the problem.

--- pv-1.5.7/autoconf/header.in.orig	2015-03-03 14:45:21.433192939 -0800
+++ pv-1.5.7/autoconf/header.in	2015-03-03 14:46:02.429291023 -0800
@@ -70,6 +70,7 @@
 #   define stat64 stat
 #   define fstat64 fstat
 #  endif
+# elif defined(__sun) && defined(__SVR4)
 # else
 #  define stat64 stat
 #  define fstat64 fstat