This fixes the build:
--- a/configure.ac
+++ b/configure.ac
@@ -852,6 +852,7 @@ fi
AC_CACHE_CHECK([if gettimeofday takes tz
argument],rsync_cv_HAVE_GETTIMEOFDAY_TZ,[
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/time.h>
+#include <stdlib.h>
#include <unistd.h>]], [[struct timeval tv; exit(gettimeofday(&tv,
NULL));]])],[rsync_cv_HAVE_GETTIMEOFDAY_TZ=yes],[rsync_cv_HAVE_GETTIMEOFDAY_TZ=no])])
if test x"$rsync_cv_HAVE_GETTIMEOFDAY_TZ" != x"no"; then
AC_DEFINE(HAVE_GETTIMEOFDAY_TZ, 1, [Define to 1 if gettimeofday()
takes a time-zone arg])
