X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_graph.c;h=9e23a4af06efa10ec652a8643cc0528c80211196;hp=bd7e3c341a2dd3f8934146736f14c3914363bcd0;hb=9bd31998dca452615148d9e618118aee2a0d2dff;hpb=8be74deb0aa2a4ee0898642ba9df8a3e5f3f97d6

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index bd7e3c3..9e23a4a 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1359,12 +1359,15 @@ int data_proc(
     return 0;
 }
 
-
 static int find_first_weekday(void){
     static int first_weekday = -1;
     if (first_weekday == -1){
-#if defined(HAVE_NL_LANGINFO)
-        first_weekday = nl_langinfo(_NL_TIME_FIRST_WEEKDAY)[0] - 1;
+#ifdef HAVE__NL_TIME_WEEK_1STDAY
+        /* according to http://sourceware.org/ml/libc-locales/2009-q1/msg00011.html */
+        long week_1stday_l = (long) nl_langinfo (_NL_TIME_WEEK_1STDAY);
+        if (week_1stday_l == 19971130) first_weekday = 0; /* Sun */
+        else if (week_1stday_l == 19971201) first_weekday = 1; /* Mon */
+        else first_weekday = 1; /* we go for a monday default */
 #else
         first_weekday = 1;
 #endif