From 13c173d22cf3051f41fa5ced8cc98ca0b0725083 Mon Sep 17 00:00:00 2001
From: Lev Kujawski <int21h@mailbox.org>
Date: Wed, 6 Jan 2021 12:17:28 -0700
Subject: [PATCH] On Linux, use SVR4's (now POSIX) mktime() instead of BSD's
 non-standard timelocal().

---
 cde/programs/dtcm/dtcm/monthglance.c |  6 +++---
 cde/programs/dtcm/server/repeat.c    | 18 +++++++++---------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/cde/programs/dtcm/dtcm/monthglance.c b/cde/programs/dtcm/dtcm/monthglance.c
index 72facdf4e..0a5743bee 100644
--- a/cde/programs/dtcm/dtcm/monthglance.c
+++ b/cde/programs/dtcm/dtcm/monthglance.c
@@ -286,7 +286,7 @@ paint_month(Calendar *c, Tick key, XRectangle *rect)
  
         tm              = *_XLocaltime(&key, localtime_buf);
         tm.tm_mday      = 1;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
         tm.tm_isdst      = -1;
         day             = mktime(&tm);
 #else
@@ -466,7 +466,7 @@ layout_month(
 
 	tm = *_XLocaltime(&date, localtime_buf);
 	tm.tm_mday = 1;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	tm.tm_isdst = -1;
 	day = mktime(&tm);
 #else
@@ -703,7 +703,7 @@ count_month_pages(Calendar *c, Tick start_date, int lines_per_box)
 
         tm    = *_XLocaltime(&start_date, localtime_buf);
         tm.tm_mday = 1;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
         tm.tm_isdst = -1;
         day   = (int)mktime(&tm);
 #else
diff --git a/cde/programs/dtcm/server/repeat.c b/cde/programs/dtcm/server/repeat.c
index d86eeb936..ac3b15cae 100644
--- a/cde/programs/dtcm/server/repeat.c
+++ b/cde/programs/dtcm/server/repeat.c
@@ -814,7 +814,7 @@ next_ndays(time_t t, int n)
 	tm.tm_min	= 0;
 	tm.tm_hour	= 0;
 
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	next            = mktime(&tm);
 #else
 	next		= timelocal(&tm);
@@ -1004,7 +1004,7 @@ prev_nmonth(time_t t, int n)
 		tm.tm_mon += 12;
 		tm.tm_year--;
 	}
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	tm.tm_isdst = -1;
 	return(mktime(&tm));
 #else
@@ -1088,7 +1088,7 @@ nextnyear(time_t t, int n)
 
 	tm	= *_XLocaltime(&t, localtime_buf);
 	tm.tm_year += n;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	return(mktime(&tm));
 #else
 	return(timelocal(&tm));
@@ -1110,7 +1110,7 @@ prevnyear(time_t t, int n)
 
 	tm = *_XLocaltime(&t, localtime_buf);
 	tm.tm_year -= n;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	return(mktime(&tm));
 #else
 	return(timelocal(&tm));
@@ -1139,7 +1139,7 @@ prevmonth_exactday(time_t t)
 		prev = previousmonth(previousmonth(t));		/* hop over the month */
 		tm = *_XLocaltime(&prev, localtime_buf);
 		tm.tm_mday = day;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 		tm.tm_isdst = -1;
 		prev =(mktime(&tm)) + sdelta;
 #else
@@ -1172,7 +1172,7 @@ nextmonth_exactday(time_t t)
 		next = next_nmonth(t, 2);		/* hop over the month */
 		tm = *_XLocaltime(&next, localtime_buf);
 		tm.tm_mday = day;
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 		tm.tm_isdst = -1;
 		next = mktime(&tm) + sdelta;
 #else
@@ -1201,7 +1201,7 @@ previousmonth(time_t t)
 		tm.tm_mday=1;
 		tm.tm_mon--;
 	}
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	tm.tm_isdst = -1;
 	return(mktime(&tm));
 #else
@@ -1513,7 +1513,7 @@ nextnmth_exactday(time_t t, int n)
 			t = next;
 	}
 
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	tm2.tm_isdst = -1;
 	next = mktime(&tm2);
 #else
@@ -1549,7 +1549,7 @@ prevnmth_exactday(time_t t, int n)
 			t = prev;
 	}
 
-#ifdef SVR4
+#if defined(SVR4) || defined(__linux__)
 	tm2.tm_isdst = -1;
 	prev = mktime(&tm2);
 #else