From 9ca0cf7545500a7666d69bd133c06e3a9306c4a6 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jon@radscan.com>
Date: Sun, 24 Oct 2021 12:01:45 -0600
Subject: [PATCH] configure: fix timezone/tm checks to work on Linux (time.h is
 needed)

---
 cde/configure.ac | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cde/configure.ac b/cde/configure.ac
index cf6e5167a..8865a04a6 100644
--- a/cde/configure.ac
+++ b/cde/configure.ac
@@ -404,8 +404,10 @@ AC_CHECK_SIZEOF([long long])
 AC_CHECK_SIZEOF([time_t])
 
 AC_STRUCT_TIMEZONE
-AC_CHECK_DECLS([timezone])
-AC_CHECK_MEMBERS([struct tm.tm_gmtoff])
+AC_CHECK_DECLS([timezone],,,
+        [#include <time.h>])
+AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,
+        [#include <time.h>])
 
 dnl jpeg
 AC_CHECK_LIB(jpeg, jpeg_read_header, [JPEGLIB="-ljpeg"],