From 09a7b2cf923d246c398d5b28c3e201571448f28e Mon Sep 17 00:00:00 2001 From: Edward Hartnett Date: Fri, 7 Aug 2020 12:17:24 -0600 Subject: [PATCH] added comment --- configure.ac | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/configure.ac b/configure.ac index c1654643fd6..5d6eecae15e 100644 --- a/configure.ac +++ b/configure.ac @@ -289,7 +289,8 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include "netcdf_meta.h"], AC_MSG_CHECKING([whether netCDF provides szip write capability]) AC_MSG_RESULT([${have_szip_write}]) -# Do we have parallel filter support? +# Do we have parallel filter support? Parallel filters are required +# for iotype NETCDF4P to use compression. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include "netcdf_meta.h"], [[#if !NC_HAS_PAR_FILTERS # error