diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/configure.in gnuplot-5.0.1.new/configure.in
--- gnuplot-5.0.1.orig/configure.in	2015-05-19 01:07:16.000000000 +0200
+++ gnuplot-5.0.1.new/configure.in	2015-12-01 00:49:17.507692991 +0100
@@ -369,7 +369,7 @@
     [AC_DEFINE(LINUXVGA,1,
                [ Define if this is a Linux system with SuperVGA library. ])
      LINUXSUID='chown root $(bindir)/gnuplot; chmod u+s $(bindir)/gnuplot'
-     TERMLIBS="-lvga $TERMLIBS"],
+     TERMLIBS="/usr/${ARCHLIB:=lib}/libvga.a $TERMLIBS"],
     with_linux_vga=no)
 fi
 
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/docs/Makefile.am gnuplot-5.0.1.new/docs/Makefile.am
--- gnuplot-5.0.1.orig/docs/Makefile.am	2015-05-03 00:22:33.000000000 +0200
+++ gnuplot-5.0.1.new/docs/Makefile.am	2015-12-01 01:24:55.097654431 +0100
@@ -38,7 +38,7 @@
 #
 
 # default is what is needed for interactive gnuplot
-gih_DATA = gnuplot.gih
+gih_DATA = gnuplot.gih gnuplot-fr.gih
 gihdir = @GIHDIR@
 
 noinst_PROGRAMS = checkdoc doc2ipf doc2tex doc2gih doc2rnh doc2hlp \
@@ -86,7 +86,7 @@
 checkdoc gnuplot.txt gnuplot.tmp VERSION gnuplot.4tc gnuplot.4ct	\
 gnuplot.idv gnuplot.xref gnuplot.lg figures pdffigures.aux		\
 wxhelp/*.html wxhelp/wgnuplot.htc windows/wgnuplot.htk gnuplot.pdf	\
-gnuplot.htb gnuplot.texi gnuplot-eldoc.el $(ELCS)
+gnuplot.htb gnuplot.texi gnuplot-eldoc.el $(ELCS) gnuplot-fr.gih
 
 DISTFILES = $(DIST_COMMON) $(SOURCES) $(DOCHEADERS) $(EXTRA_DIST)
 
@@ -270,16 +270,20 @@
 doc2hlp_SOURCES = doc2hlp.c termdoc.c
 
 ### gnuplot interactive help format
-gih: gnuplot.gih
+gih: gnuplot.gih gnuplot-fr.gih
 
 gnuplot.gih: doc2gih$(EXEEXT) $(srcdir)/gnuplot.doc
 	./doc2gih$(EXEEXT) $(srcdir)/gnuplot.doc gnuplot.gih
 
+gnuplot-fr.gih: doc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc
+	./doc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc gnuplot-fr.gih
+
 doc2gih_SOURCES = doc2gih.c termdoc.c
 
 # To include all terminals in the .gih file
-allgih: alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc
+allgih: alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc $(srcdir)/gnuplot-fr.doc
 	./alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc gnuplot.gih
+	./alldoc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc gnuplot-fr.gih
 
 alldoc2gih_SOURCES = doc2gih.c termdoc.c
 alldoc2gih_CPPFLAGS = -DALL_TERM_DOC $(AM_CPPFLAGS)
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/docs/Makefile.in gnuplot-5.0.1.new/docs/Makefile.in
--- gnuplot-5.0.1.orig/docs/Makefile.in	2015-06-07 17:20:29.000000000 +0200
+++ gnuplot-5.0.1.new/docs/Makefile.in	2015-12-01 01:24:32.578385309 +0100
@@ -1,4 +1,4 @@
-# Makefile.in generated by automake 1.14 from Makefile.am.
+# Makefile.in generated by automake 1.14.1 from Makefile.am.
 # @configure_input@
 
 # Copyright (C) 1994-2013 Free Software Foundation, Inc.
@@ -406,7 +406,7 @@
 top_srcdir = @top_srcdir@
 
 # default is what is needed for interactive gnuplot
-gih_DATA = gnuplot.gih
+gih_DATA = gnuplot.gih gnuplot-fr.gih
 gihdir = @GIHDIR@
 AM_CPPFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/term
 T = $(top_srcdir)/term/
@@ -446,7 +446,7 @@
 checkdoc gnuplot.txt gnuplot.tmp VERSION gnuplot.4tc gnuplot.4ct	\
 gnuplot.idv gnuplot.xref gnuplot.lg figures pdffigures.aux		\
 wxhelp/*.html wxhelp/wgnuplot.htc windows/wgnuplot.htk gnuplot.pdf	\
-gnuplot.htb gnuplot.texi gnuplot-eldoc.el $(ELCS)
+gnuplot.htb gnuplot.texi gnuplot-eldoc.el $(ELCS) gnuplot-fr.gih
 
 DISTFILES = $(DIST_COMMON) $(SOURCES) $(DOCHEADERS) $(EXTRA_DIST)
 BUILT_SOURCES = allterm.h
@@ -1044,14 +1044,18 @@
 	./doc2hlp$(EXEEXT) $(srcdir)/gnuplot.doc gnuplot.hlp
 
 ### gnuplot interactive help format
-gih: gnuplot.gih
+gih: gnuplot.gih gnuplot-fr.gih
 
 gnuplot.gih: doc2gih$(EXEEXT) $(srcdir)/gnuplot.doc
 	./doc2gih$(EXEEXT) $(srcdir)/gnuplot.doc gnuplot.gih
 
+gnuplot-fr.gih: doc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc
+	./doc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc gnuplot-fr.gih
+
 # To include all terminals in the .gih file
-allgih: alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc
+allgih: alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc $(srcdir)/gnuplot-fr.doc
 	./alldoc2gih$(EXEEXT) $(srcdir)/gnuplot.doc gnuplot.gih
+	./alldoc2gih$(EXEEXT) $(srcdir)/gnuplot-fr.doc gnuplot-fr.gih
 
 ### wxhelp format
 htb: gnuplot.htb
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/docs/gnuplot-fr.doc gnuplot-5.0.1.new/docs/gnuplot-fr.doc
--- gnuplot-5.0.1.orig/docs/gnuplot-fr.doc	2015-12-01 00:39:35.048785014 +0100
+++ gnuplot-5.0.1.new/docs/gnuplot-fr.doc	2015-12-01 00:49:17.511692953 +0100
@@ -436,8 +436,8 @@
 #Home      & same as \verb~^A~. \\
 #Ctrl Home & same as \verb~^E~. \\
 #Esc       & same as \verb~^U~. \\
-#Help      & `{\bf help}' plus Entrée. \\
-#Ctrl Help & `{\bf help }'. \\
+#Help      & `{\bf help}` plus Entrée. \\
+#Ctrl Help & `{\bf help }`. \\
 %c l .
 %Touche fléchée@Fonction
 %_
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/src/gadgets.h gnuplot-5.0.1.new/src/gadgets.h
--- gnuplot-5.0.1.orig/src/gadgets.h	2015-03-29 19:47:03.000000000 +0200
+++ gnuplot-5.0.1.new/src/gadgets.h	2015-12-01 00:49:17.511692953 +0100
@@ -473,7 +473,7 @@
 extern TBOOLEAN	clip_lines2;
 extern TBOOLEAN	clip_points;
 
-#define SAMPLES 100		/* default number of samples for a plot */
+#define SAMPLES 500		/* default number of samples for a plot */
 extern int samples_1;
 extern int samples_2;
 
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/src/gplt_x11.c gnuplot-5.0.1.new/src/gplt_x11.c
--- gnuplot-5.0.1.orig/src/gplt_x11.c	2015-12-01 00:48:21.452198467 +0100
+++ gnuplot-5.0.1.new/src/gplt_x11.c	2015-12-01 00:49:17.511692953 +0100
@@ -2524,9 +2524,12 @@
 	}
     }
     /*   X11_justify_text(mode) - set text justification mode  */
-    else if (*buffer == 'J')
-	sscanf(buffer, "J%d", (int *) &plot->jmode);
-
+    else if (*buffer == 'J') {
+	int jmode;
+	sscanf(buffer, "J%d", &jmode);
+	plot->jmode = jmode;
+    }
+ 
     else if (*buffer == 'A')
 	sscanf(buffer + 1, "%lf", &plot->angle);
 
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/src/plot.c gnuplot-5.0.1.new/src/plot.c
--- gnuplot-5.0.1.orig/src/plot.c	2014-12-31 05:32:09.000000000 +0100
+++ gnuplot-5.0.1.new/src/plot.c	2015-12-01 00:49:17.511692953 +0100
@@ -216,6 +216,7 @@
 void
 drop_privilege()
 {
+#ifndef SVGA_IS_SECURE
     if (!asked_privi) {
 	euid = geteuid();
 	egid = getegid();
@@ -229,11 +230,13 @@
     if (seteuid(ruid) == -1)
 	(void) fprintf(stderr, "seteuid(%d): %s\n",
 		       (int) ruid, strerror(errno));
+#endif
 }
 
 void
 take_privilege()
 {
+#ifndef SVGA_IS_SECURE
     if (!asked_privi) {
 	euid = geteuid();
 	egid = getegid();
@@ -247,6 +250,7 @@
     if (seteuid(euid) == -1)
 	(void) fprintf(stderr, "seteuid(%d): %s\n",
 		       (int) euid, strerror(errno));
+#endif
 }
 
 #endif /* LINUXVGA */
@@ -273,8 +277,8 @@
     int i;
 
 #ifdef LINUXVGA
-    LINUX_setup();		/* setup VGA before dropping privilege DBT 4/5/99 */
     drop_privilege();
+    LINUX_setup();
 #endif
 /* make sure that we really have revoked root access, this might happen if
    gnuplot is compiled without vga support but is installed suid by mistake */
@@ -329,6 +333,22 @@
     rl_getc_function = getc_wrapper;
 #endif
 
+#ifdef __linux__
+    if (!getenv("GNUHELP")) {
+	const char* msg = setlocale(LC_MESSAGES, NULL);
+	if (msg) {
+	    char hfile[64];
+	    struct stat buf;
+
+	    sprintf(hfile, "/usr/share/gnuplot/%s/gnuplot-", gnuplot_version);
+	    strncat(hfile, msg, 2);
+	    strcat (hfile, ".gih");
+	    if (stat(hfile, &buf) == 0)
+		setenv("GNUHELP", strdup(hfile), 0);
+	}
+    }
+#endif
+
 #if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDITLINE)
     /* T.Walter 1999-06-24: 'rl_readline_name' must be this fix name.
      * It is used to parse a 'gnuplot' specific section in '~/.inputrc'
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/src/term.h gnuplot-5.0.1.new/src/term.h
--- gnuplot-5.0.1.orig/src/term.h	2014-10-01 04:40:29.000000000 +0200
+++ gnuplot-5.0.1.new/src/term.h	2015-12-01 00:49:17.511692953 +0100
@@ -261,9 +261,9 @@
 #include "emf.trm"
 
 /* Roland DXY800A plotter */
-/* #include "dxy.trm" */
+#include "dxy.trm"
 /* QMS/EXCL laserprinter (Talaris 1590 and others) */
-/* #include "excl.trm" */
+#include "excl.trm"
 
 /* fig graphics */
 #include "fig.trm"
@@ -296,7 +296,7 @@
 /* #include "imagen.trm" */
 
 /* Kyocera Prescribe printer */
-/* #include "kyo.trm" */
+#include "kyo.trm"
 
 /* Frame Maker MIF 3.00 format driver */
 #ifdef HAVE_MIF
diff -U 3 -H -d -r -N -- gnuplot-5.0.1.orig/term/linux.trm gnuplot-5.0.1.new/term/linux.trm
--- gnuplot-5.0.1.orig/term/linux.trm	2012-01-30 20:31:01.000000000 +0100
+++ gnuplot-5.0.1.new/term/linux.trm	2015-12-01 00:49:17.511692953 +0100
@@ -195,7 +195,7 @@
 TERM_PUBLIC void LINUX_move __PROTO((unsigned int x, unsigned int y));
 TERM_PUBLIC void LINUX_vector __PROTO((unsigned int x, unsigned int y));
 TERM_PUBLIC int LINUX_text_angle __PROTO((int ang));
-TERM_PUBLIC void LINUX_put_text __PROTO((unsigned int x, unsigned int y, const char *str));
+TERM_PUBLIC void LINUX_put_text __PROTO((unsigned int x, unsigned int y, char *str));
 TERM_PUBLIC void LINUX_suspend __PROTO((void));
 TERM_PUBLIC void LINUX_resume __PROTO((void));
 
@@ -408,7 +408,7 @@
 }
 
 TERM_PUBLIC void
-LINUX_put_text(unsigned int x, unsigned int y, const char *str)
+LINUX_put_text(unsigned int x, unsigned int y, char *str)
 {
     int i;
     switch (linux_angle) {