From 0b529b0b7dfb4435dfb324a205c38b9befb9d30d Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 1 Dec 2022 18:17:11 -0800
Subject: [PROPOSED] Add zic.c comment re __SUNPRO_C

Suggested by Guy Harris in:
https://mm.icann.org/pipermail/tz/2022-December/032395.html
* zic.c (alignof): Add comment.
---
 zic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/zic.c b/zic.c
index 5612805..77417c6 100644
--- a/zic.c
+++ b/zic.c
@@ -66,7 +66,9 @@ enum { FORMAT_LEN_GROWTH_BOUND = 5 };
 # define MKDIR_UMASK 0755
 #endif
 
-/* The minimum alignment of a type, for pre-C23 platforms.  */
+/* The minimum alignment of a type, for pre-C23 platforms.
+   The __SUNPRO_C test is because Oracle Developer Studio 12.6 lacks
+   <stdalign.h> even though __STDC_VERSION__ == 201112.  */
 #if __STDC_VERSION__ < 201112 || defined __SUNPRO_C
 # define alignof(type) offsetof(struct { char a; type b; }, b)
 #elif __STDC_VERSION__ < 202311
-- 
2.38.1