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Posted 30 Oct 2010
Licenced CPOL

Writing a Platform and GUI Toolkit Independent OpenGL Class

, 1 Nov 2010
Article showing how to write OS and GUI toolkit portable OpenGL view class
basecode
linux
MultiGL
GLView
GLViewGTKApp
.project
AUTHORS
autom4te.cache
output.0
requests
traces.0
ChangeLog
config.guess
config.h.in
config.sub
configure
configure.in
COPYING
depcomp
glviewgtkapp.gladep
INSTALL
install-sh
Makefile.am
Makefile.in
missing
mkinstalldirs
NEWS
po
ChangeLog
Makefile.in.in
POTFILES.in
README
src
Makefile.am
Makefile.in
stamp-h.in
GLViewMotifApp
.project
autom4te.cache
output.0
requests
traces.0
config.h.in
configure
configure.ac
depcomp
install-sh
Makefile.am
Makefile.in
missing
src
Makefile.am
Makefile.in
GLViewQtApp
.project
GLViewQtApp.ico
GLViewQtApp.pro.user
glviewqtapp.qrc
Makefile
Resources
.project
autom4te.cache
output.0
requests
traces.0
config.guess
config.h.in
config.sub
configure
configure.ac
depcomp
install-sh
m4
Makefile.am
Makefile.in
missing
src
Makefile.am
Makefile.in
win32
MultiGL
GLView
GLViewGTKApp
AUTHORS
ChangeLog
configure.in
devcpp
glviewgtkapp.dev
glviewgtkapp.gladep
Makefile.am
msvc
glviewgtkapp.suo
glviewgtkapp.vcproj
NEWS
po
ChangeLog
POTFILES.in
README
src
Makefile.am
stamp-h.in
GLViewMFCDlgApp
GLViewMFCDlgApp.aps
GLViewMFCDlgApp.vcproj
res
GLViewMFCDlgApp.ico
GLViewMFCMDIApp
GLViewMFCMDIApp.vcproj
res
buttons.bmp
filelarge.bmp
filesmall.bmp
GLViewMFCMDIApp.ico
GLViewMFCMDIAppDoc.ico
main.bmp
Toolbar.bmp
Toolbar256.bmp
writelarge.bmp
writesmall.bmp
GLViewQtApp
GLViewQtApp
GLViewQtApp.ico
glviewqtapp.qrc
GLViewQtApp.vcproj
Makefile
moc_glviewqtapp.o
Resources
GLView.cpp.bak
GLView.suo
GLView.vcproj
MultiGL.suo
# Helper functions for option handling.                    -*- Autoconf -*-
#
#   Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
#   Written by Gary V. Vaughan, 2004
#
# This file is free software; the Free Software Foundation gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.

# serial 6 ltoptions.m4

# This is to help aclocal find these macros, as it can't see m4_define.
AC_DEFUN([LTOPTIONS_VERSION], [m4_if([1])])


# _LT_MANGLE_OPTION(MACRO-NAME, OPTION-NAME)
# ------------------------------------------
m4_define([_LT_MANGLE_OPTION],
[[_LT_OPTION_]m4_bpatsubst($1__$2, [[^a-zA-Z0-9_]], [_])])


# _LT_SET_OPTION(MACRO-NAME, OPTION-NAME)
# ---------------------------------------
# Set option OPTION-NAME for macro MACRO-NAME, and if there is a
# matching handler defined, dispatch to it.  Other OPTION-NAMEs are
# saved as a flag.
m4_define([_LT_SET_OPTION],
[m4_define(_LT_MANGLE_OPTION([$1], [$2]))dnl
m4_ifdef(_LT_MANGLE_DEFUN([$1], [$2]),
        _LT_MANGLE_DEFUN([$1], [$2]),
    [m4_warning([Unknown $1 option `$2'])])[]dnl
])


# _LT_IF_OPTION(MACRO-NAME, OPTION-NAME, IF-SET, [IF-NOT-SET])
# ------------------------------------------------------------
# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
m4_define([_LT_IF_OPTION],
[m4_ifdef(_LT_MANGLE_OPTION([$1], [$2]), [$3], [$4])])


# _LT_UNLESS_OPTIONS(MACRO-NAME, OPTION-LIST, IF-NOT-SET)
# -------------------------------------------------------
# Execute IF-NOT-SET unless all options in OPTION-LIST for MACRO-NAME
# are set.
m4_define([_LT_UNLESS_OPTIONS],
[m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
	    [m4_ifdef(_LT_MANGLE_OPTION([$1], _LT_Option),
		      [m4_define([$0_found])])])[]dnl
m4_ifdef([$0_found], [m4_undefine([$0_found])], [$3
])[]dnl
])


# _LT_SET_OPTIONS(MACRO-NAME, OPTION-LIST)
# ----------------------------------------
# OPTION-LIST is a space-separated list of Libtool options associated
# with MACRO-NAME.  If any OPTION has a matching handler declared with
# LT_OPTION_DEFINE, dispatch to that macro; otherwise complain about
# the unknown option and exit.
m4_defun([_LT_SET_OPTIONS],
[# Set options
m4_foreach([_LT_Option], m4_split(m4_normalize([$2])),
    [_LT_SET_OPTION([$1], _LT_Option)])

m4_if([$1],[LT_INIT],[
  dnl
  dnl Simply set some default values (i.e off) if boolean options were not
  dnl specified:
  _LT_UNLESS_OPTIONS([LT_INIT], [dlopen], [enable_dlopen=no
  ])
  _LT_UNLESS_OPTIONS([LT_INIT], [win32-dll], [enable_win32_dll=no
  ])
  dnl
  dnl If no reference was made to various pairs of opposing options, then
  dnl we run the default mode handler for the pair.  For example, if neither
  dnl `shared' nor `disable-shared' was passed, we enable building of shared
  dnl archives by default:
  _LT_UNLESS_OPTIONS([LT_INIT], [shared disable-shared], [_LT_ENABLE_SHARED])
  _LT_UNLESS_OPTIONS([LT_INIT], [static disable-static], [_LT_ENABLE_STATIC])
  _LT_UNLESS_OPTIONS([LT_INIT], [pic-only no-pic], [_LT_WITH_PIC])
  _LT_UNLESS_OPTIONS([LT_INIT], [fast-install disable-fast-install],
  		   [_LT_ENABLE_FAST_INSTALL])
  ])
])# _LT_SET_OPTIONS


## --------------------------------- ##
## Macros to handle LT_INIT options. ##
## --------------------------------- ##

# _LT_MANGLE_DEFUN(MACRO-NAME, OPTION-NAME)
# -----------------------------------------
m4_define([_LT_MANGLE_DEFUN],
[[_LT_OPTION_DEFUN_]m4_bpatsubst(m4_toupper([$1__$2]), [[^A-Z0-9_]], [_])])


# LT_OPTION_DEFINE(MACRO-NAME, OPTION-NAME, CODE)
# -----------------------------------------------
m4_define([LT_OPTION_DEFINE],
[m4_define(_LT_MANGLE_DEFUN([$1], [$2]), [$3])[]dnl
])# LT_OPTION_DEFINE


# dlopen
# ------
LT_OPTION_DEFINE([LT_INIT], [dlopen], [enable_dlopen=yes
])

AU_DEFUN([AC_LIBTOOL_DLOPEN],
[_LT_SET_OPTION([LT_INIT], [dlopen])
AC_DIAGNOSE([obsolete],
[$0: Remove this warning and the call to _LT_SET_OPTION when you
put the `dlopen' option into LT_INIT's first parameter.])
])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AC_LIBTOOL_DLOPEN], [])


# win32-dll
# ---------
# Declare package support for building win32 dll's.
LT_OPTION_DEFINE([LT_INIT], [win32-dll],
[enable_win32_dll=yes

case $host in
*-*-cygwin* | *-*-mingw* | *-*-pw32* | *-cegcc*)
  AC_CHECK_TOOL(AS, as, false)
  AC_CHECK_TOOL(DLLTOOL, dlltool, false)
  AC_CHECK_TOOL(OBJDUMP, objdump, false)
  ;;
esac

test -z "$AS" && AS=as
_LT_DECL([], [AS],      [0], [Assembler program])dnl

test -z "$DLLTOOL" && DLLTOOL=dlltool
_LT_DECL([], [DLLTOOL], [0], [DLL creation program])dnl

test -z "$OBJDUMP" && OBJDUMP=objdump
_LT_DECL([], [OBJDUMP], [0], [Object dumper program])dnl
])# win32-dll

AU_DEFUN([AC_LIBTOOL_WIN32_DLL],
[AC_REQUIRE([AC_CANONICAL_HOST])dnl
_LT_SET_OPTION([LT_INIT], [win32-dll])
AC_DIAGNOSE([obsolete],
[$0: Remove this warning and the call to _LT_SET_OPTION when you
put the `win32-dll' option into LT_INIT's first parameter.])
])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AC_LIBTOOL_WIN32_DLL], [])


# _LT_ENABLE_SHARED([DEFAULT])
# ----------------------------
# implement the --enable-shared flag, and supports the `shared' and
# `disable-shared' LT_INIT options.
# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
m4_define([_LT_ENABLE_SHARED],
[m4_define([_LT_ENABLE_SHARED_DEFAULT], [m4_if($1, no, no, yes)])dnl
AC_ARG_ENABLE([shared],
    [AS_HELP_STRING([--enable-shared@<:@=PKGS@:>@],
	[build shared libraries @<:@default=]_LT_ENABLE_SHARED_DEFAULT[@:>@])],
    [p=${PACKAGE-default}
    case $enableval in
    yes) enable_shared=yes ;;
    no) enable_shared=no ;;
    *)
      enable_shared=no
      # Look at the argument we got.  We use all the common list separators.
      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
      for pkg in $enableval; do
	IFS="$lt_save_ifs"
	if test "X$pkg" = "X$p"; then
	  enable_shared=yes
	fi
      done
      IFS="$lt_save_ifs"
      ;;
    esac],
    [enable_shared=]_LT_ENABLE_SHARED_DEFAULT)

    _LT_DECL([build_libtool_libs], [enable_shared], [0],
	[Whether or not to build shared libraries])
])# _LT_ENABLE_SHARED

LT_OPTION_DEFINE([LT_INIT], [shared], [_LT_ENABLE_SHARED([yes])])
LT_OPTION_DEFINE([LT_INIT], [disable-shared], [_LT_ENABLE_SHARED([no])])

# Old names:
AC_DEFUN([AC_ENABLE_SHARED],
[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[shared])
])

AC_DEFUN([AC_DISABLE_SHARED],
[_LT_SET_OPTION([LT_INIT], [disable-shared])
])

AU_DEFUN([AM_ENABLE_SHARED], [AC_ENABLE_SHARED($@)])
AU_DEFUN([AM_DISABLE_SHARED], [AC_DISABLE_SHARED($@)])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AM_ENABLE_SHARED], [])
dnl AC_DEFUN([AM_DISABLE_SHARED], [])



# _LT_ENABLE_STATIC([DEFAULT])
# ----------------------------
# implement the --enable-static flag, and support the `static' and
# `disable-static' LT_INIT options.
# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
m4_define([_LT_ENABLE_STATIC],
[m4_define([_LT_ENABLE_STATIC_DEFAULT], [m4_if($1, no, no, yes)])dnl
AC_ARG_ENABLE([static],
    [AS_HELP_STRING([--enable-static@<:@=PKGS@:>@],
	[build static libraries @<:@default=]_LT_ENABLE_STATIC_DEFAULT[@:>@])],
    [p=${PACKAGE-default}
    case $enableval in
    yes) enable_static=yes ;;
    no) enable_static=no ;;
    *)
     enable_static=no
      # Look at the argument we got.  We use all the common list separators.
      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
      for pkg in $enableval; do
	IFS="$lt_save_ifs"
	if test "X$pkg" = "X$p"; then
	  enable_static=yes
	fi
      done
      IFS="$lt_save_ifs"
      ;;
    esac],
    [enable_static=]_LT_ENABLE_STATIC_DEFAULT)

    _LT_DECL([build_old_libs], [enable_static], [0],
	[Whether or not to build static libraries])
])# _LT_ENABLE_STATIC

LT_OPTION_DEFINE([LT_INIT], [static], [_LT_ENABLE_STATIC([yes])])
LT_OPTION_DEFINE([LT_INIT], [disable-static], [_LT_ENABLE_STATIC([no])])

# Old names:
AC_DEFUN([AC_ENABLE_STATIC],
[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[static])
])

AC_DEFUN([AC_DISABLE_STATIC],
[_LT_SET_OPTION([LT_INIT], [disable-static])
])

AU_DEFUN([AM_ENABLE_STATIC], [AC_ENABLE_STATIC($@)])
AU_DEFUN([AM_DISABLE_STATIC], [AC_DISABLE_STATIC($@)])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AM_ENABLE_STATIC], [])
dnl AC_DEFUN([AM_DISABLE_STATIC], [])



# _LT_ENABLE_FAST_INSTALL([DEFAULT])
# ----------------------------------
# implement the --enable-fast-install flag, and support the `fast-install'
# and `disable-fast-install' LT_INIT options.
# DEFAULT is either `yes' or `no'.  If omitted, it defaults to `yes'.
m4_define([_LT_ENABLE_FAST_INSTALL],
[m4_define([_LT_ENABLE_FAST_INSTALL_DEFAULT], [m4_if($1, no, no, yes)])dnl
AC_ARG_ENABLE([fast-install],
    [AS_HELP_STRING([--enable-fast-install@<:@=PKGS@:>@],
    [optimize for fast installation @<:@default=]_LT_ENABLE_FAST_INSTALL_DEFAULT[@:>@])],
    [p=${PACKAGE-default}
    case $enableval in
    yes) enable_fast_install=yes ;;
    no) enable_fast_install=no ;;
    *)
      enable_fast_install=no
      # Look at the argument we got.  We use all the common list separators.
      lt_save_ifs="$IFS"; IFS="${IFS}$PATH_SEPARATOR,"
      for pkg in $enableval; do
	IFS="$lt_save_ifs"
	if test "X$pkg" = "X$p"; then
	  enable_fast_install=yes
	fi
      done
      IFS="$lt_save_ifs"
      ;;
    esac],
    [enable_fast_install=]_LT_ENABLE_FAST_INSTALL_DEFAULT)

_LT_DECL([fast_install], [enable_fast_install], [0],
	 [Whether or not to optimize for fast installation])dnl
])# _LT_ENABLE_FAST_INSTALL

LT_OPTION_DEFINE([LT_INIT], [fast-install], [_LT_ENABLE_FAST_INSTALL([yes])])
LT_OPTION_DEFINE([LT_INIT], [disable-fast-install], [_LT_ENABLE_FAST_INSTALL([no])])

# Old names:
AU_DEFUN([AC_ENABLE_FAST_INSTALL],
[_LT_SET_OPTION([LT_INIT], m4_if([$1], [no], [disable-])[fast-install])
AC_DIAGNOSE([obsolete],
[$0: Remove this warning and the call to _LT_SET_OPTION when you put
the `fast-install' option into LT_INIT's first parameter.])
])

AU_DEFUN([AC_DISABLE_FAST_INSTALL],
[_LT_SET_OPTION([LT_INIT], [disable-fast-install])
AC_DIAGNOSE([obsolete],
[$0: Remove this warning and the call to _LT_SET_OPTION when you put
the `disable-fast-install' option into LT_INIT's first parameter.])
])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AC_ENABLE_FAST_INSTALL], [])
dnl AC_DEFUN([AM_DISABLE_FAST_INSTALL], [])


# _LT_WITH_PIC([MODE])
# --------------------
# implement the --with-pic flag, and support the `pic-only' and `no-pic'
# LT_INIT options.
# MODE is either `yes' or `no'.  If omitted, it defaults to `both'.
m4_define([_LT_WITH_PIC],
[AC_ARG_WITH([pic],
    [AS_HELP_STRING([--with-pic],
	[try to use only PIC/non-PIC objects @<:@default=use both@:>@])],
    [pic_mode="$withval"],
    [pic_mode=default])

test -z "$pic_mode" && pic_mode=m4_default([$1], [default])

_LT_DECL([], [pic_mode], [0], [What type of objects to build])dnl
])# _LT_WITH_PIC

LT_OPTION_DEFINE([LT_INIT], [pic-only], [_LT_WITH_PIC([yes])])
LT_OPTION_DEFINE([LT_INIT], [no-pic], [_LT_WITH_PIC([no])])

# Old name:
AU_DEFUN([AC_LIBTOOL_PICMODE],
[_LT_SET_OPTION([LT_INIT], [pic-only])
AC_DIAGNOSE([obsolete],
[$0: Remove this warning and the call to _LT_SET_OPTION when you
put the `pic-only' option into LT_INIT's first parameter.])
])

dnl aclocal-1.4 backwards compatibility:
dnl AC_DEFUN([AC_LIBTOOL_PICMODE], [])

## ----------------- ##
## LTDL_INIT Options ##
## ----------------- ##

m4_define([_LTDL_MODE], [])
LT_OPTION_DEFINE([LTDL_INIT], [nonrecursive],
		 [m4_define([_LTDL_MODE], [nonrecursive])])
LT_OPTION_DEFINE([LTDL_INIT], [recursive],
		 [m4_define([_LTDL_MODE], [recursive])])
LT_OPTION_DEFINE([LTDL_INIT], [subproject],
		 [m4_define([_LTDL_MODE], [subproject])])

m4_define([_LTDL_TYPE], [])
LT_OPTION_DEFINE([LTDL_INIT], [installable],
		 [m4_define([_LTDL_TYPE], [installable])])
LT_OPTION_DEFINE([LTDL_INIT], [convenience],
		 [m4_define([_LTDL_TYPE], [convenience])])

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About the Author

Sharjith
Product Manager Mahindra & Mahindra
India India
Sharjith is a Mechanical Engineer with strong passion for Automobiles, Aircrafts and Software development.

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