diff --git a/src/makeg95.env b/src/makeg95.env
index 4a895237c3..7dfcb53b0a 100644
--- a/src/makeg95.env
+++ b/src/makeg95.env
@@ -1,9 +1,12 @@
+#
 # makeg95.env
 # Common makefile settings for wxWindows programs
 # This file is included by all the other makefiles, thus changes 
 # made here take effect everywhere (except where overriden).
 # The settings are for GnuWin32-derived compilers, i.e. Cygwin and Mingw32.
 #
+# CVS_ID: $Id$
+#
 
 # If using Cygwin, set this to 0.
 # If using Mingw32, set this to 1.
@@ -12,11 +15,20 @@ MINGW32=1
 # Set to the version you have
 MINGW32VERSION=2.95
 
+# If building DLL, the version
+WXVERSION=21_11
+
+# Say yes if you have a "modern" linker that supports --shared option.
+# Note that you're probably going to wait forever for dlltool/gcc/etc
+# to build the DLL, so you should really use a newer linker that
+# supports --shared.
+LD_SUPPORTS_SHARED=yes
+
 # Set to the appropriate remove command
 RM=rm -f 
 
-# Set to the appropriate copy command
-COPY=copy
+# Set to the appropriate copy command and separator
+COPY=cp
 
 ########################## Compiler ##################################
 
@@ -24,7 +36,7 @@ COPY=copy
 # Put a comment before --pipe for Cygwin, remove comment for Mingw32 2.95
 
 ifeq ($(MINGW32),1)
-  ifeq ($(MINGW32VERSION),2.95)
+  ifneq "$(findstring 2.95, $(MINGW32VERSION))" ""
     CC = gcc --pipe -fvtable-thunks
   else
     CC = gcc
@@ -39,6 +51,8 @@ CCC = $(CC)
 # Compiler used for LEX generated C
 CCLEX=gcc
 
+# GRG: This shouldn't be here! make is supposed to define the
+# MAKE variable itself.
 MAKE=make
 
 # LEX
@@ -49,7 +63,7 @@ YACC=byacc
 #YACC=bison
 
 # Settings for Cyginw/Mingw32
-RESCOMP=windres.exe
+RESCOMP=windres
 RCINPUTSWITCH=-i
 RCOUTPUTSWITCH=-o
 RCINCSWITCH=--include-dir
@@ -57,6 +71,10 @@ RCDEFSWITCH=--define
 
 RESFLAGS=$(RCINCSWITCH) $(WXDIR)/include $(RCDEFSWITCH) __WIN32__ $(RCDEFSWITCH) __WIN95__ $(RCDEFSWITCH) __GNUWIN32__
 
+# Needed to build a DLL if your linker does not support --shared option.
+AS = as
+DLLTOOL = dlltool
+
 ########################## Compiler flags #############################
 
 # Miscellaneous compiler options
@@ -97,15 +115,16 @@ WARN = -Wall
 # Which GUI, -Dwx_xview or -Dwx_motif (don't change this)
 GUI = -D__WXMSW__ -D__WINDOWS__
 
-# according to Guillermo Rodriguez Garcia <guille@iies.es> this flag is
-# needed to make the standard div() function work - otherwise it returns
-# absolutely incorrect results and completely breaks the wxImage class
-# (where it's used extensively)
-# GRG: at least it is needed in mingw32-gcc2.8.1
+# According to Guillermo Rodriguez Garcia <guille@iies.es>, the
+# -fno-pcc-struct-return option is needed to make the standard div()
+# function work - otherwise it returns absolutely incorrect results
+# which breaks the wxImage class. This is true at least for
+# mingw32-gcc2.8.1, don't know about others.
 OPT = -fno-pcc-struct-return -O2 -fno-rtti -fno-exceptions
 
 # Options for ar archiver
 # AROPTIONS = crs # For IRIX and Solaris (both SYSVR4).
+AR = ar
 AROPTIONS = ruv
 RANLIB = ranlib
 
@@ -136,21 +155,25 @@ WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx.$(LIBSUFF)
 GNUWIN32EXTRA=-I$(WXDIR)/include/wx/msw/gnuwin32 
 
 ifeq ($(MINGW32),1)
-  ifeq ($(MINGW32),2.95)
+  ifneq "$(findstring 2.95, $(MINGW32VERSION))" ""
     GNUWIN32EXTRA=
   endif
 endif
 
 ifeq ($(MINGW32),1)
-INC = -I$(WXINC) -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/xpm $(EXTRAINC) $(COMPPATHS)
+INC = -I$(WXINC) -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/xpm -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS)
 else
-INC = -I$(WXINC) -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/xpm $(EXTRAINC) $(COMPPATHS) -I$(WXDIR)/include/wx/msw/gnuwin32 
+INC = -I$(WXINC) -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/xpm -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS) -I$(WXDIR)/include/wx/msw/gnuwin32 
 endif
 
 RCLFLAGS=-cpp "cpp -lang-c++ -DWIN32 -D_WIN32 -DRCL_INVOKED -I$(WXWIN)/include"
 
-#LIBS = $(WXLIB) $(WXDIR)/lib/libzlib.a $(WXDIR)/lib/libpng.a $(WXDIR)/lib/libjpeg.a $(WINLIBS) $(COMPLIBS) $(EXTRALIBS)
-LIBS = $(WXLIB) -lpng -ljpeg -lzlib -lxpm $(WINLIBS) $(COMPLIBS) $(EXTRALIBS)
+ifdef WXUSINGDLL
+  # png, jpeg, etc are exported from wx dll, so skip and save on link time.
+  LIBS = $(WXLIB) $(WINLIBS) $(COMPLIBS) $(EXTRALIBS)
+else
+  LIBS = $(WXLIB) -lpng -ljpeg -lzlib -lxpm -ltiff $(WINLIBS) $(COMPLIBS) $(EXTRALIBS)
+endif
 
 WINFLAGS=-D_X86_=1 -DWIN32 -D_WIN32 $(WINVERSION)
 
@@ -163,9 +186,20 @@ LDLIBS = $(LIBS)
 # OBJDIR = objects$(GUISUFFIX)
 OBJDIR = .
 
+ifdef WXMAKINGDLL
+  EXTRADLLFLAGS = -DWXMAKINGDLL=1 -D_DLL=1 -D_WINDLL=1
+  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(WXVERSION).$(LIBSUFF)
+endif
+
+ifdef WXUSINGDLL
+  EXTRADLLFLAGS = -DWXUSINGDLL=1
+  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(WXVERSION).$(LIBSUFF)
+endif
+
+
 # You shouldn't need to change these...
-CPPFLAGS = $(XINCLUDE) $(INC) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACPPFLAGS)
-CFLAGS = $(XINCLUDE) $(INC) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACFLAGS)
+CPPFLAGS = $(XINCLUDE) $(INC) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACPPFLAGS) $(EXTRADLLFLAGS)
+CFLAGS = $(XINCLUDE) $(INC) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACFLAGS) -DWIN32_LEAN_AND_MEAN
 WINDOWSLDFLAGS=-Wl,--subsystem,windows -mwindows
 LDFLAGS = $(WINDOWSLDFLAGS) -L$(WXDIR)/lib $(EXTRALDFLAGS)