Index: src/config.h
--- src/config.h.orig	2015-10-21 23:11:04.000000000 +0200
+++ src/config.h	2016-03-05 10:35:31.312615434 +0100
@@ -31,7 +31,7 @@
 
 #define WITH_FLOAT
 #define WITH_REFERENCE
-#define WITH_DRAW
+#undef  WITH_DRAW
 #undef  WITH_STATISTIC
 #define WITH_COMPILATION_INFO
 #define WITH_TYPE_CHECK
Index: src/heaputl.c
--- src/heaputl.c.orig	2016-03-05 10:35:31.312615000 +0100
+++ src/heaputl.c	2016-03-05 10:35:51.742498911 +0100
@@ -38,8 +38,8 @@
 #include "stdio.h"
 #if HAS_GETRLIMIT && defined STACK_SIZE
 /* In FreeBSD it is necessary to include <sys/types.h> before <sys/resource.h> */
-#include "sys/types.h"
-#include "sys/resource.h"
+#include <sys/types.h>
+#include <sys/resource.h>
 #endif
 
 #include "common.h"
Index: src/makefile
--- src/makefile.orig	2016-02-11 20:32:43.000000000 +0100
+++ src/makefile	2016-03-05 10:35:31.312615434 +0100
@@ -4,7 +4,7 @@
 #   make
 # If you are under windows you should use MinGW with mk_mingw.mak, mk_nmake.mak or mk_msys.mak instead.
 
-# CFLAGS =
+CFLAGS =
 # CFLAGS = -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -fomit-frame-pointer -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -g -Wall -Wextra -Wswitch-default -Wswitch-enum -Wcast-qual -Waggregate-return -Wwrite-strings -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith -Wmissing-noreturn -Wno-multichar -Wc++-compat
@@ -13,7 +13,7 @@
 # CFLAGS = -O2 -g -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith -ftrapv
 # CFLAGS = -O2 -g -x c++ -Wall -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -g -ffunction-sections -fdata-sections -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith -ftrapv
-CFLAGS = -O2 -g -ffunction-sections -fdata-sections $(INCLUDE_OPTIONS) -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith
+CFLAGS = -O2 -ffunction-sections -fdata-sections $(INCLUDE_OPTIONS)
 # CFLAGS = -O2 -g -ffunction-sections -fdata-sections $(INCLUDE_OPTIONS) -Wall -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -g -std=c99 -D_POSIX_SOURCE -ffunction-sections -fdata-sections -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -g -Wall -Winline -Wconversion -Wshadow -Wpointer-arith
@@ -21,24 +21,24 @@
 # CFLAGS = -O2 -g -pg -Wall -Wstrict-prototypes -Winline -Wconversion -Wshadow -Wpointer-arith
 # CFLAGS = -O2 -fomit-frame-pointer -funroll-loops -Wall
 # CFLAGS = -O2 -funroll-loops -Wall -pg
-LDFLAGS = -Wl,--gc-sections
+LDFLAGS =
 # LDFLAGS = -pg
 # LDFLAGS = -pg -lc_p
-SYSTEM_LIBS = -lm -ldl
+SYSTEM_LIBS = -lm
 # SYSTEM_LIBS = -lm -ldl -lgmp
 # SYSTEM_LIBS = -lm_p -lc_p
 SYSTEM_CONSOLE_LIBS = -lncurses
-SYSTEM_DRAW_LIBS = -lX11
+SYSTEM_DRAW_LIBS =
 # SYSTEM_DRAW_LIBS = /usr/Xlib/libX11.so
 # SYSTEM_DRAW_LIBS = -lX11 -lXext
 # SYSTEM_DRAW_LIBS = -lGL -lGLEW -lglut
 # SYSTEM_DRAW_LIBS = -lGL -lGLEW -lX11
 SEED7_LIB = seed7_05.a
 CONSOLE_LIB = s7_con.a
-DRAW_LIB = s7_draw.a
+DRAW_LIB =
 COMP_DATA_LIB = s7_data.a
 COMPILER_LIB = s7_comp.a
-ALL_S7_LIBS = ../bin/$(COMPILER_LIB) ../bin/$(COMP_DATA_LIB) ../bin/$(DRAW_LIB) ../bin/$(CONSOLE_LIB) ../bin/$(SEED7_LIB)
+ALL_S7_LIBS = ../bin/$(COMPILER_LIB) ../bin/$(COMP_DATA_LIB) ../bin/$(CONSOLE_LIB) ../bin/$(SEED7_LIB)
 # CC = g++
 CC = gcc
 GET_CC_VERSION_INFO = $(CC) --version >
@@ -90,7 +90,7 @@
 DOBJ = $(BIGINT_LIB).o cmd_unx.o dll_unx.o fil_unx.o pcs_unx.o pol_unx.o tim_unx.o
 OBJ = $(MOBJ)
 SEED7_LIB_OBJ = $(ROBJ) $(DOBJ)
-DRAW_LIB_OBJ = gkb_rtl.o drw_x11.o gkb_x11.o
+DRAW_LIB_OBJ =
 COMP_DATA_LIB_OBJ = typ_data.o rfl_data.o ref_data.o listutl.o flistutl.o typeutl.o datautl.o
 COMPILER_LIB_OBJ = $(POBJ) $(LOBJ) $(EOBJ) $(AOBJ) $(GOBJ)
 
Index: src/objutl.c
--- src/objutl.c.orig	2015-06-04 23:39:11.000000000 +0200
+++ src/objutl.c	2016-03-05 10:35:31.312615434 +0100
@@ -760,7 +760,9 @@
         if (object->value.winValue != NULL) {
           object->value.winValue->usage_count--;
           if (object->value.winValue->usage_count == 0) {
+#ifdef WITH_DRAW
             drwFree(object->value.winValue);
+#endif
           } /* if */
         } /* if */
         SET_UNUSED_FLAG(object);