From f65bcbcbd89faa6c3961387261a89821ab4d3ef6 Mon Sep 17 00:00:00 2001
From: Noritada Kobayashi <noritada.kobayashi@gmail.com>
Date: Sat, 17 Aug 2024 19:53:10 +0900
Subject: [PATCH] Update help text for build options that affect file
 encoding/decoding capability

Putting the purpose of build options in the help text would improve the
installation experience for users who are not familiar with various
GRIB2 packing types.
---
 CMakeLists.txt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ed952d..177abea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,10 +24,10 @@ option(DISABLE_TIMEZONE "Disable posix Timezone?" off)
 option(DISABLE_ALARM "Disable Alarm?" off)
 set(USE_NAMES "NCEP")
 option(USE_G2CLIB "Use g2c lib?" off)
-option(USE_PNG "Use PNG?" off)
-option(USE_JASPER "Use Jasper?" off)
-option(USE_OPENJPEG "Use OpenJPEG?" off)
-option(USE_AEC "Use AEC?" off)
+option(USE_PNG "Use PNG to enable decoding of GRIB2 data with PNG packing (packing type 41)." off)
+option(USE_JASPER "Use Jasper to enable encoding/decoding of GRIB2 data with JPEG 2000 packing (packing type 40)." off)
+option(USE_OPENJPEG "Use OpenJPEG to enable encoding/decoding of GRIB2 data with JPEG 2000 packing (packing type 40)." off)
+option(USE_AEC "Use AEC to enable encoding/decoding of GRIB2 data with CCSDS packing (packing type 42)." off)
 option(FTP_TEST_FILES "Fetch and test with files on FTP site." OFF)
 option(FTP_LARGE_TEST_FILES "Fetch and test with very large files on FTP site." OFF)
 option(FTP_EXTRA_TEST_FILES "Fetch even more large files from FTP and test them." OFF)