Document osx hack

[wxWidgets.git] / src / makeg95.env

diff --git a/src/makeg95.env b/src/makeg95.env
index 39f402da26cea12c8634ec620f64aa6971d06b1c..f235603377533b316caa780460b3c5c9d6b07818 100644 (file)
--- a/src/makeg95.env
+++ b/src/makeg95.env
@@ -10,16 +10,80 @@
 # CVS_ID: $Id$
 #
 
 # CVS_ID: $Id$
 #
 

-# If using Cygwin beta, set this to 0.
-# If using Mingw32 or Cygwin 1.0 or later, set this to 1.
+# The MINGW32 and MINGW32VERSION variables are preconfigured for
+# MinGW gcc version 3.x and must both be changed for any version
+# earlier than 3.0 or for cygwin. Editing this file is one way to
+# change them. An easier way, at least with GNU make, is to override
+# them on the command line, e.g.
+#   make MINGW32=0 MINGW32VERSION=2.8 -f makefile.g95
+
+# If using Mingw32 (any version), set this to 1.
+# If using Cygwin (any version), set this to 0.
+#
+# This agrees with the instructions given in docs/msw/install.txt .
+# Earlier versions of this makefile suggested setting MINGW32=1 for
+# recent versions of cygwin, but that would give the wrong dll entry
+# point in src/msw/makefile.g95 .
+#
+# With cygwin, there are still some problems compiling wxWindows
+# this way; './configure && make' may work better.
+#

 MINGW32=1
 
 MINGW32=1
 

-# Set to the version you have
-#MINGW32VERSION=2.95
+# set MIN_SUFFIX to nothing if you use only MinGW compiler, set it to
+# something MinGW-specific if you want to build wxWindows with more than one
+# compiler
+ifeq ($(MINGW32),1)
+  MIN_SUFFIX=_min
+else
+  MIN_SUFFIX=_cyg
+endif
+
+# Set to your gcc version. Generally 'gcc --version' tells you
+# which version you have. But it cannot distinguish between
+# 2.95.2-1 and earlier suffix versions of 2.95 . In that case,
+# inspect the dates of bin/gcc.exe and bin/ld.exe ; if they
+# are at least
+#   2000-01-21 for gcc.exe and
+#   2000-02-04 for ld.exe
+# then use '2.95-late'.
+#
+# gcc 2.8.x and earlier require struct-return workaround
+#MINGW32VERSION=2.8
+#
+# gcc 2.95.2 and earlier requires special thunk option
+#MINGW32VERSION=2.9-early
+#
+# mingw gcc-2.95.2-1 supports '-shared'
+# windres provided with gcc-2.95.2-1 supports temp file option
+#MINGW32VERSION=2.95-late
+#
+# gcc 3.x provides a win32api.h header

 MINGW32VERSION=3.0
 
 MINGW32VERSION=3.0
 

+# If you want to compile on Wine, simply uncomment this variable
+# If you don't want to edit the file, you can simply define it
+# on the command line like so: make WINE=1 -f makefile.g95
+#WINE=1
+
+# Set this if you are using a cross-compiler, i.e. compiling on one system
+# the program for another one
+# CROSS=i386-mingw32-
+
+# If we're using MSYS, or other utilities that use forward slashes,
+# you need to set this when invoking the makefile from DOS, or the
+# wrong separators will be assumed. However, if you're using MSYS,
+# you really ought to invoke the makefile from MSYS--or, even better,
+# use the './configure && make' technique that MSYS is designed for.
+ifndef WINE
+#OSTYPE=msys
+else
+OSTYPE=msys
+endif
+

 # If building DLL, the version
 # If building DLL, the version

-WXVERSION=233
+include $(WXDIR)/src/version.mak
+WXVERSION=$(wxMAJOR_VERSION)$(wxMINOR_VERSION)$(wxRELEASE_NUMBER_IFUNSTABLE)

 
 ifndef UNICODE
   UNICODE=0
 
 ifndef UNICODE
   UNICODE=0


@@ -33,12 +97,6 @@ ifndef wxUSE_GUI
   wxUSE_GUI=1
 endif
 
   wxUSE_GUI=1
 endif
 

-# 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 (must support forward slashes)
 # You can get a suitable rm.exe from ports/mingw32/extra.zip on the ftp site.
 RM=rm -f
 # Set to the appropriate remove command (must support forward slashes)
 # You can get a suitable rm.exe from ports/mingw32/extra.zip on the ftp site.
 RM=rm -f


@@ -49,80 +107,137 @@ COPY=cp
 
 ########################## Compiler ##################################
 
 
 ########################## Compiler ##################################
 

-# C++ compiler
-# Put a comment before --pipe for Cygwin, remove comment for Mingw32 2.95
+ifneq (,$(findstring $(MINGW32VERSION),2.8))
+# According to Guillermo Rodriguez Garcia <guille@iies.es>, the
+# -fno-pcc-struct-return option is needed to make the standard div()
+# function work - otherwise it returns absolutely incorrect results
+# which breaks the wxImage class. This was fixed on 1998-08-14 for
+# mingw and cygwin. It is preferable not to use this option where it
+# is not required, because it is documented to cause binary API
+# incompatibility.
+  _STRUCT_RETURN_WORKAROUND=-fno-pcc-struct-return
+# Really old versions of cygwin are thought to require extra headers.
+  ifneq ($(MINGW32),1)
+    GNUWIN32EXTRA=-I$(WXDIR)/include/wx/msw/gnuwin32
+  endif
+endif

 
 

-# _GCC295 means GCC is GCC 2.95
-# _GCC3 mans GCC is 3.x or better (can actually just be 3.1 or better
-#                                  for Cygwin/MinGW)
-ifneq (,$(findstring 2.95, $(MINGW32VERSION)))
-  _GCC295=1
+ifneq (,$(findstring $(MINGW32VERSION),2.8 2.9-early))
+# Earlier versions of this makefile defined the following macros
+# explicitly; mingw versions since at least '2.95-late' define
+# them already.
+  OBSOLETE_DEFINES = -D_X86_=1 -DWIN32 -D_WIN32 -D__WIN32__

 endif
 endif

-ifneq (,$(findstring 3., $(MINGW32VERSION)))
-  _GCC3=1
+# But cygwin doesn't define them, at least through its version
+# 2.95.3-4 of gcc.
+ifneq ($(MINGW32),1)
+  OBSOLETE_DEFINES = -D_X86_=1 -DWIN32 -D_WIN32 -D__WIN32__

 endif
 
 endif
 

-ifeq ($(MINGW32),1)
-  ifneq "$(_GCC295)$(_GCC3)" ""
-    ifeq ($(_GCC3),1)
-      CC = gcc --pipe
-    else
-      CC = gcc --pipe -fvtable-thunks
-    endif
-  else
-    CC = gcc
-  endif
-else
-  CC = gcc
+ifneq (,$(findstring $(MINGW32VERSION),2.8 2.9-early 2.95-late))
+# Versions prior to 3.0 require -fvtable-thunks for OLE support.
+# All code must be built with this option, even C++ libraries you
+# only link to, including system libraries. This option can cause
+# subtle problems with multiple inheritance.
+  _THUNK_WORKAROUND=-fvtable-thunks

 endif
 
 endif
 

-# C compiler for pure C programs
-CCC = $(CC)
+ifeq (,$(findstring $(MINGW32VERSION),2.8 2.9-early))
+# Versions since 2.95.2-1 support '-shared', which makes linking
+# a dll *much* faster; and the accompanying windres supports
+# '--use-temp-file', which is more robust.
+  LD_SUPPORTS_SHARED=yes
+  _USE_TEMP_FILE_IF_SUPPORTED=--use-temp-file
+# Use the WIN32 wxDirDialog only if we have a recent mingw version
+  RECENT_MINGW=yes
+endif
+
+ifeq (,$(findstring $(MINGW32VERSION),2.8 2.9-early 2.95-late))
+# Versions since 3.0 provide win32api.h . An old comment said to
+# define this 'if you have w32api >= 0.5', but mingw 2.95.2-1
+# has no such header.
+ifndef WINE
+  _USE_W32API_HEADER_IF_SUPPORTED = -DHAVE_W32API_H
+endif
+#
+# Revision 1.70.2.6 of this file suggested '--pipe' for mingw but
+# not for cygwin, and only for version 3.0 or later. Since then,
+# the advice given here
+#   http://mail.gnu.org/pipermail/autoconf/2000-July/005479.html
+# is followed, and '--pipe' is not used unless you specify it on
+# the make command line, e.g.
+#   make CXXFLAGS=--pipe CFLAGS=--pipe -f makefile.g95
+#
+endif
+
+# Define the C++ and C compiler respectively
+ifndef WINE
+CXX = $(CROSS)g++
+CC = $(CROSS)gcc
+else
+CXX = wineg++
+CC = winegcc
+endif

 
 # Compiler used for LEX generated C
 
 # Compiler used for LEX generated C

-CCLEX=gcc
+# For now at least, it can be the same as the regular C compiler
+CCLEX = $(CROSS)$(CC)

 
 # This shouldn't be needed as make is supposed to define this
 # variable itself. Uncomment it if your make complains.
 #MAKE=make
 
 # LEX (currently unused)
 
 # This shouldn't be needed as make is supposed to define this
 # variable itself. Uncomment it if your make complains.
 #MAKE=make
 
 # LEX (currently unused)

-LEX=flex # -t -L
+# LEX=flex # -t -L

 
 # YACC (currently unused)
 
 # YACC (currently unused)

-YACC=byacc
-#YACC=bison
+# YACC=byacc
+# YACC=bison

 
 # Settings for Cyginw/Mingw32
 # Some versions of windres cannot cope with the --preprocessor
 # option. Uncomment the RCPREPROCESSOR line below if yours can.
 
 # Settings for Cyginw/Mingw32
 # Some versions of windres cannot cope with the --preprocessor
 # option. Uncomment the RCPREPROCESSOR line below if yours can.

-RESCOMP=windres
+ifndef WINE
+RESCOMP=$(CROSS)windres $(_USE_TEMP_FILE_IF_SUPPORTED)
+else
+RESCOMP=wrc
+endif

 RCINPUTSWITCH=-i
 RCOUTPUTSWITCH=-o
 RCINCSWITCH=--include-dir
 RCDEFSWITCH=--define
 # Note that this can cause windres to fail (Win95/98 problem?)
 # but commenting out RCPREPROCESSOR then does the trick.
 RCINPUTSWITCH=-i
 RCOUTPUTSWITCH=-o
 RCINCSWITCH=--include-dir
 RCDEFSWITCH=--define
 # Note that this can cause windres to fail (Win95/98 problem?)
 # but commenting out RCPREPROCESSOR then does the trick.

-#RCPREPROCESSOR=--preprocessor "$(CC) -c -E -xc-header -DRC_INVOKED"
+#RCPREPROCESSOR=--preprocessor "$(CXX) -c -E -xc-header -DRC_INVOKED"

 
 # Don't make this too long (e.g. by adding contrib/include/wx) because it will
 # truncate the command line
 
 # Don't make this too long (e.g. by adding contrib/include/wx) because it will
 # truncate the command line

-# Note: --use-temp-file removed since Mingw32 2.95.2 doesn't recognise it

 RESFLAGS=$(RCPREPROCESSOR) $(RCINCSWITCH) $(WXDIR)/include $(RCEXTRAINC) $(RCDEFSWITCH) __WIN32__ $(RCDEFSWITCH) __WIN95__ $(RCDEFSWITCH) __GNUWIN32__
 
 # Needed to build a DLL if your linker does not support --shared option.
 RESFLAGS=$(RCPREPROCESSOR) $(RCINCSWITCH) $(WXDIR)/include $(RCEXTRAINC) $(RCDEFSWITCH) __WIN32__ $(RCDEFSWITCH) __WIN95__ $(RCDEFSWITCH) __GNUWIN32__
 
 # Needed to build a DLL if your linker does not support --shared option.

-AS = as
-DLLTOOL = dlltool
+AS = $(CROSS)as
+DLLTOOL = $(CROSS)dlltool

 
 ########################## Compiler flags #############################
 
 
 ########################## Compiler flags #############################
 

+# Unicode defines
+ifeq ($(UNICODE),1)
+  UNICODE_OPT = -D_UNICODE -DUNICODE -DwxUSE_UNICODE=1
+else
+  UNICODE_OPT =
+endif
+

 # Miscellaneous compiler options
 # Miscellaneous compiler options

-# GRG: the __MINGW32__ option is not needed anymore
-# add "-DHAVE_W32API_H" if you have w32api >= 0.5
-OPTIONS = -DSTRICT # -D__MINGW32__
+OPTIONS = -DSTRICT $(_USE_W32API_HEADER_IF_SUPPORTED)

 
 # Add "-mthreads" if you want to have threads under mingw32
 
 # Add "-mthreads" if you want to have threads under mingw32

-COMMON_THREADFLAGS =
+# Add "-mno-cygwin" if you want to link with msvcrt.dll in Cywin and Wine
+#                   Otherwise, you link against the native runtime (cygwin.dll
+#                   or libc). Having the flag in mingw32 does not hurt as you
+#                   always link against msvcrt.dll By default it should be on,
+#                   to minimize dependencies on Cygwin, and have more correct
+#                   filename behaviour in Wine.
+COMMON_FLAGS = -mno-cygwin  # -mthreads

 
 # Debugging information
 ifeq ($(FINAL),0)
 
 # Debugging information
 ifeq ($(FINAL),0)


@@ -136,14 +251,15 @@ ifeq ($(WIN95),0)
 # With 4.0, you'll have to follow Win95 procedures for icons or you'll get the
 # default Windows icon.
 APPVER=3.50
 # With 4.0, you'll have to follow Win95 procedures for icons or you'll get the
 # default Windows icon.
 APPVER=3.50

-WINVERSION=-DWINVER=0x0350 -D__GNUWIN32__ -D__WIN32__ # Generic WIN32
+WINVERSION=-DWINVER=0x0350 -D__GNUWIN32__ # Generic WIN32

 else
 APPVER=4.0 # 3.50
 else
 APPVER=4.0 # 3.50

-# This means 'enable Windows 95 features' (in wxWindows and in VC++ 4.0).
-WINVERSION=-DWINVER=0x0400 -D__WIN95__ -D__GNUWIN32__ -D__WIN32__
+# This means 'enable Windows 95 features' (in wxWindows and in the compiler).
+WINVERSION=-DWINVER=0x0400 -D__GNUWIN32__

 endif
 
 endif
 

-CPU=i386
+# This is never used and should be expunged.
+# CPU=i386

 
 # Suffixes
 OBJSUFF=o
 
 # Suffixes
 OBJSUFF=o


@@ -160,29 +276,22 @@ WARN = -Wall
 # build wxbase/wxMSW
 ifeq ($(wxUSE_GUI),1)
     TOOLKIT=msw
 # build wxbase/wxMSW
 ifeq ($(wxUSE_GUI),1)
     TOOLKIT=msw

-    GUI = -D__WXMSW__ -D__WINDOWS__
+    GUI =

 else
     TOOLKIT=base
 else
     TOOLKIT=base

-    GUI = -D__WXMSW__ -D__WINDOWS__ -DwxUSE_GUI=0
+    GUI = -DwxUSE_GUI=0

 endif
 
 endif
 

-
-# 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.

 ifeq ($(FINAL),1)
 ifeq ($(FINAL),1)

-  OPT = -fno-pcc-struct-return -O2 -fno-rtti -fno-exceptions
+  OPT = -O2 -fno-rtti -fno-exceptions

 else
 else

-  OPT = -fno-pcc-struct-return -fno-rtti -fno-exceptions
+  OPT = -fno-rtti -fno-exceptions

 endif
 
 # Options for ar archiver
 endif
 
 # Options for ar archiver

-# AROPTIONS = crs # For IRIX and Solaris (both SYSVR4).
-AR = ar

 AROPTIONS = ruv
 AROPTIONS = ruv

-RANLIB = ranlib
+AR = $(CROSS)ar
+RANLIB = $(CROSS)ranlib

 
 # Extra compiler libraries
 COMPLIBS=
 
 # Extra compiler libraries
 COMPLIBS=


@@ -196,15 +305,15 @@ OLELIBS=-lole32 -loleaut32 -luuid
 BASELIBS=-lstdc++ -lgcc -lodbc32 -lwsock32
 ifeq ($(wxUSE_GUI),1)
   WINLIBS= $(BASELIBS) \
 BASELIBS=-lstdc++ -lgcc -lodbc32 -lwsock32
 ifeq ($(wxUSE_GUI),1)
   WINLIBS= $(BASELIBS) \

-         -lwinspool -lwinmm -lshell32 \
-         -lcomctl32 -lctl3d32 -lodbc32 -ladvapi32 \
-         -lodbc32 -lwsock32 -lopengl32 -lglu32 $(OLELIBS) #  -loldnames
+          -lwinspool -lwinmm -lshell32 \
+          -lcomctl32 -lctl3d32 -lodbc32 -ladvapi32 \
+          -lodbc32 -lwsock32 -lopengl32 -lglu32 $(OLELIBS) #  -loldnames

 else
   WINLIBS=$(BASELIBS)
 endif
 
 #WINLIBS=-lstdc++ -lgcc \
 else
   WINLIBS=$(BASELIBS)
 endif
 
 #WINLIBS=-lstdc++ -lgcc \

-#      -lwinspool -lwinmm -lshell32 \
+#    -lwinspool -lwinmm -lshell32 \

 #    -lcomctl32 -lctl3d32 -lodbc32 -ladvapi32 -lwsock32 # -loldnames
 
 # Shouldn't need to change these...
 #    -lcomctl32 -lctl3d32 -lodbc32 -ladvapi32 -lwsock32 # -loldnames
 
 # Shouldn't need to change these...


@@ -212,30 +321,22 @@ WXSRC=$(WXDIR)/src/msw
 WXINC=$(WXDIR)/include
 WXBASESRC=$(WXDIR)/src/common
 
 WXINC=$(WXDIR)/include
 WXBASESRC=$(WXDIR)/src/common
 

-GNUWIN32EXTRA=-I$(WXDIR)/include/wx/msw/gnuwin32
-
-ifeq ($(MINGW32),1)
-  ifneq "$(findstring 2.95, $(MINGW32VERSION))" ""
-    GNUWIN32EXTRA=
-  endif
-endif
-

 #ifeq ($(MINGW32),1)
 #INC = -I$(WXINC) -I$(WXDIR)/contrib/include -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS)
 #else
 #ifeq ($(MINGW32),1)
 #INC = -I$(WXINC) -I$(WXDIR)/contrib/include -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS)
 #else

-INC = -I$(WXDIR)/lib/$(TOOLKIT)$(INCEXT) -I$(WXINC) -I$(WXDIR)/contrib/include -I$(WXDIR)/src/regex -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS) -I$(WXDIR)/include/wx/msw/gnuwin32
+INC = -I$(WXDIR)/lib/$(TOOLKIT)$(INCEXT) -I$(WXINC) -I$(WXDIR)/contrib/include -I$(WXDIR)/src/regex -I$(WXDIR)/src/png -I$(WXDIR)/src/jpeg -I$(WXDIR)/src/zlib -I$(WXDIR)/src/tiff $(EXTRAINC) $(COMPPATHS) $(GNUWIN32EXTRA)

 #endif
 
 #endif
 

-RCLFLAGS=-cpp "cpp -lang-c++ -DWIN32 -D_WIN32 -DRCL_INVOKED -I$(WXWIN)/include"
+RCLFLAGS=-cpp "cpp -lang-c++ $(OBSOLETE_DEFINES) -DRCL_INVOKED -I$(WXWIN)/include"

 
 ifdef WXUSINGDLL
   # png, jpeg, etc are exported from wx dll, so skip and save on link time.
   LIBS = $(EXTRALIBS) $(WXLIB) $(WINLIBS) $(COMPLIBS)
 else
 
 ifdef WXUSINGDLL
   # png, jpeg, etc are exported from wx dll, so skip and save on link time.
   LIBS = $(EXTRALIBS) $(WXLIB) $(WINLIBS) $(COMPLIBS)
 else

-  LIBS = $(EXTRALIBS) $(WXLIB) -lregex -lpng -ljpeg -lzlib -ltiff $(WINLIBS) $(COMPLIBS)
+  LIBS = $(EXTRALIBS) $(WXLIB) -lregex$(MIN_SUFFIX) -lpng$(MIN_SUFFIX) -ljpeg$(MIN_SUFFIX) -lzlib$(MIN_SUFFIX) -ltiff$(MIN_SUFFIX) $(WINLIBS) $(COMPLIBS)

 endif
 
 endif
 

-WINFLAGS=-D_X86_=1 -DWIN32 -D_WIN32 $(WINVERSION)
+WINFLAGS = $(OBSOLETE_DEFINES) $(WINVERSION)

 
 #for windows 95
 XINCLUDE=$(WINFLAGS)
 
 #for windows 95
 XINCLUDE=$(WINFLAGS)


@@ -268,33 +369,69 @@ WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(TOOLKIT)$(UNIEXT)$(DEBEXT).$(LIBSUFF)
 
 ifdef WXMAKINGDLL
   EXTRADLLFLAGS = -DWXMAKINGDLL=1 -D_DLL=1 -D_WINDLL=1
 
 ifdef WXMAKINGDLL
   EXTRADLLFLAGS = -DWXMAKINGDLL=1 -D_DLL=1 -D_WINDLL=1

-  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(TOOLKIT)$(WXVERSION)$(UNIEXT)$(DEBEXT).$(LIBSUFF)
+  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(TOOLKIT)$(WXVERSION)$(UNIEXT)$(DEBEXT)$(MIN_SUFFIX).$(LIBSUFF)

 endif
 
 ifdef WXUSINGDLL
   EXTRADLLFLAGS = -DWXUSINGDLL=1
 endif
 
 ifdef WXUSINGDLL
   EXTRADLLFLAGS = -DWXUSINGDLL=1

-  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(TOOLKIT)$(WXVERSION)$(UNIEXT)$(DEBEXT).$(LIBSUFF)
+  WXLIB=$(WXDIR)/lib/$(LIBPREFIX)wx$(TOOLKIT)$(WXVERSION)$(UNIEXT)$(DEBEXT)$(MIN_SUFFIX).$(LIBSUFF)

 endif
 
 
 endif
 
 

-# You shouldn't need to change these...
-CPPFLAGS = $(XINCLUDE) $(INC) $(COMMON_THREADFLAGS) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACPPFLAGS) $(EXTRADLLFLAGS)
-CFLAGS = $(XINCLUDE) $(INC) $(COMMON_THREADFLAGS) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRACFLAGS) -DWIN32_LEAN_AND_MEAN

 ifeq ($(wxUSE_GUI),1)
 ifeq ($(wxUSE_GUI),1)

-    WINDOWSLDFLAGS=-Wl,--subsystem,windows -mwindows
+    WINDOWSLDFLAGS=-Wl,--subsystem,windows
+    WINDOWSLDLIBS=-mwindows

 endif
 endif

-LDFLAGS = $(WINDOWSLDFLAGS) $(COMMON_THREADFLAGS) -L$(WXDIR)/lib -L$(WXDIR)/contrib/lib $(EXTRALDFLAGS)

 
 

-.SUFFIXES: .rc .$(RESSUFF) .$(RSCSUFF) .cpp .cxx .c
+# Note: WIN32_LEAN_AND_MEAN is defined only for C and not for C++ compiles.
+# Defining this macro means that a great deal of less commonly used stuff
+# is ignored in the windows headers, resulting in faster compiles. It can't
+# be used with some C++ source files. It just so happens that it can be
+# used with all C source files.

 
 

-.c.o:
-       $(CC) -c $(CFLAGS) -o $@ $*.c
+CFLAGS = -DWIN32_LEAN_AND_MEAN

 
 

-.cxx.o:
-       $(CC) -c $(CPPFLAGS) -o $@ $*.cxx
+WXLIBDIRS = -L$(WXDIR)/lib -L$(WXDIR)/contrib/lib

 
 

-.$(SRCSUFF).$(OBJSUFF):
-       $(CC) -c $(CPPFLAGS) -o $@ $*.$(SRCSUFF)
+# You shouldn't need to change these flags, which are merely composed of
+# the options selected above. You can add more flags by specifying them on
+# the make command line, e.g.
+#   make CXXFLAGS='-O3 -march=i686' -f makefile.g95
+# The gnu make manual says
+#   'Users expect to be able to specify CFLAGS freely themselves'
+# That was unsafe with older versions of this makefile, but now it works.
+#
+# C preprocessor flags
+# Some makefiles pass extra flags in $(EXTRACPPFLAGS); although earlier
+# versions of this file used CPPFLAGS as C++ compiler flags (instead of
+# as C preprocessor flags), it is OK to add them to the preprocessor
+# flags, which are always used for C++ compiles. Because other makefiles
+# use this method to override these flags, they are added after $(CPPFLAGS),
+# which would normally come last.
+ALL_CPPFLAGS = $(XINCLUDE) $(INC) $(CPPFLAGS) $(EXTRACPPFLAGS)
+# C and C++ compiler flags for compatibility with old gcc versions
+REQUIRED_GCC_FLAGS = $(_STRUCT_RETURN_WORKAROUND) $(_THUNK_WORKAROUND)
+# C++ compiler flags
+ALL_CXXFLAGS = $(COMMON_FLAGS) $(REQUIRED_GCC_FLAGS) $(UNICODE_OPT) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRADLLFLAGS) $(CXXFLAGS)
+# C compiler flags
+ALL_CFLAGS   = $(COMMON_FLAGS) $(REQUIRED_GCC_FLAGS) $(UNICODE_OPT) $(OPTIONS) $(GUI) $(DEBUGFLAGS) $(WARN) $(OPT) $(EXTRADLLFLAGS) $(CFLAGS)
+# Linker flags
+ALL_LDFLAGS  = $(COMMON_FLAGS) $(WINDOWSLDFLAGS) $(WINDOWSLDLIBS) $(WXLIBDIRS) $(EXTRALDFLAGS) $(LDFLAGS)
+# under Cygwin, Dlls must not be linked with subsystem=windows
+ALL_LDFLAGS_DLL  = $(COMMON_FLAGS) $(WINDOWSLDLIBS) $(WXLIBDIRS) $(EXTRALDFLAGS) $(LDFLAGS)
+  
+.SUFFIXES: .rc .$(RESSUFF) .$(RSCSUFF) .cpp .cxx .cc .c
+
+.c.o:
+       $(CC)  -c $(ALL_CPPFLAGS) $(ALL_CFLAGS) -o $@ $*.c

 
 

+.cc.o:
+       $(CXX) -c $(ALL_CPPFLAGS) $(ALL_CXXFLAGS) -o $@ $*.cc

 
 

+.cxx.o:
+       $(CXX) -c $(ALL_CPPFLAGS) $(ALL_CXXFLAGS) -o $@ $*.cxx

 
 

+# This '.cpp.o' rule is apparently written this way because
+# the 'tmake' file g95.t expects it.
+.$(SRCSUFF).$(OBJSUFF):
+       $(CXX) -c $(ALL_CPPFLAGS) $(ALL_CXXFLAGS) -o $@ $*.$(SRCSUFF)