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    dnl Process this file with autoconf to produce a configure script.
    
    dnl Original author: Michael Patra
    dnl See ChangeLog file for detailed change history.
    
    m4_define(WINE_VERSION,regexp(m4_include(VERSION),[version \([-.0-9A-Za-z]+\)],[\1]))
    
    AC_PREREQ(2.50)
    AC_INIT([Wine],WINE_VERSION)
    AC_CONFIG_SRCDIR(server/atom.c)		
    AC_CONFIG_HEADERS(include/config.h)
    
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    AC_CONFIG_AUX_DIR(tools)
    
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    dnl **** Command-line arguments ****
    
    
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    dnl Default values
    
    LIBEXT=so       # library type .so or .a
    
    AC_ARG_ENABLE(debug, AC_HELP_STRING([--disable-debug],[compile out all debugging messages]))
    AC_ARG_ENABLE(trace, AC_HELP_STRING([--disable-trace],[compile out TRACE messages]))
    AC_ARG_ENABLE(opengl,AC_HELP_STRING([--enable-opengl],[force usage of OpenGL even if the latter is thread-safe via pthread]))
    AC_ARG_WITH(curses,     AC_HELP_STRING([--without-curses],[do not use curses]))
    AC_ARG_WITH(reentrant-x,AC_HELP_STRING([--without-reentrant-x],[compile for use with non-reentrant X libraries]))
    
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    AC_SUBST(OPTIONS)
    
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    then
    
        AC_DEFINE(NO_DEBUG_MSGS,1,[Define to disable all debug messages.])
    
    if test "x$enable_trace" = "xno" -o "x$enable_debug" = "xno"
    
        AC_DEFINE(NO_TRACE_MSGS,1,[Define to disable trace messages.])
    
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    fi
    
    
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    dnl **** Check for some programs ****
    
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    AC_PROG_MAKE_SET
    AC_PROG_CC
    
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    AC_PROG_CPP
    
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    AC_PATH_XTRA
    
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    AC_PROG_YACC
    AC_PROG_LEX
    
    
    dnl **** Just additional warning checks, since AC_PROG just sets 'yacc' even
    dnl **** without one present.
    AC_CHECK_PROGS(XYACC,$YACC bison yacc,none)
    if test "$XYACC" = "none"
    then
    
      AC_MSG_ERROR([no suitable bison/yacc found. Please install the 'bison' package.])
    
    AC_CHECK_PROGS(XLEX,$LEX flex lex,none)
    if test "$XLEX" = "none"
    then
    
      AC_MSG_ERROR([no suitable lex found. Please install the 'flex' package.])
    
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    AC_PROG_RANLIB
    
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    AC_PROG_INSTALL
    
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    AC_PROG_LN_S
    
    AC_CHECK_PROG(C2MAN,c2man,c2man,\$(TOPSRCDIR)/tools/c2man.pl)
    
    AC_PATH_PROG(LDCONFIG, ldconfig, true, /sbin:/usr/sbin:$PATH)
    
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    dnl Check for lint
    AC_CHECK_PROGS(LINT, lclint lint)
    if test "$LINT" = "lint"
    then
      LINTFLAGS="$LINTFLAGS -errchk=%all,no%longptr64 -errhdr=%user -Ncheck=macro -Nlevel=4"
      dnl LINTFLAGS='-D_SIZE_T "-Dsize_t=unsigned long" -errchk=longptr64'
    fi
    AC_SUBST(LINT)
    AC_SUBST(LINTFLAGS)
    
    
    case $host_os in
      *cygwin*) LDCOMBINE="ld -r --enable-stdcall-fixup" ;;
             *) LDCOMBINE="ld -r" ;;
    esac
    
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    dnl **** Check for some libraries ****
    
    
    dnl Check for -lm
    
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    dnl Check for -li386 for NetBSD and OpenBSD
    
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    AC_CHECK_LIB(i386,i386_set_ldt)
    
    dnl Check for -lossaudio for NetBSD
    AC_CHECK_LIB(ossaudio,_oss_ioctl)
    
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    dnl Check for -lw for Solaris
    
    AC_CHECK_FUNCS(iswalnum,,AC_CHECK_LIB(w,iswalnum))
    
    dnl Check for -lnsl for Solaris
    
    AC_CHECK_FUNCS(gethostbyname,,AC_CHECK_LIB(nsl,gethostbyname))
    
    dnl Check for -lsocket for Solaris
    
    AC_CHECK_FUNCS(connect,,AC_CHECK_LIB(socket,connect))
    
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    dnl Check for -lxpg4 for FreeBSD
    
    AC_CHECK_LIB(xpg4,_xpg4_setrunelocale)
    
    dnl Check for -lmmap for OS/2
    AC_CHECK_LIB(mmap,mmap)
    
    dnl Check for openpty
    
    UTILLIBS=""
    AC_SUBST(UTILLIBS)
    
    AC_CHECK_FUNCS(openpty,,
    
    	[AC_CHECK_LIB(util,openpty,
    		[AC_DEFINE(HAVE_OPENPTY)
    
    		UTILLIBS="-lutil"]
    
    DLLIBS=""
    AC_SUBST(DLLIBS)
    
        [AC_CHECK_FUNCS(dlopen,,
            [AC_CHECK_LIB(dl,dlopen,
                         [AC_DEFINE(HAVE_DLOPEN,1,[Define if you have dlopen])
    
                         DLLIBS="-ldl"],
    
    JPEGLIB=""
    AC_SUBST(JPEGLIB)
    AC_CHECK_HEADERS(jpeglib.h,
        AC_CHECK_LIB(jpeg,jpeg_start_decompress,
        	AC_DEFINE(HAVE_LIBJPEG,1,[Define if you have libjpeg including devel headers])
    	JPEGLIB="-ljpeg"
        )
    )
    
    
    
    AC_SUBST(XFILES)
    XFILES=""
    
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    AC_SUBST(OPENGLFILES)
    OPENGLFILES=""
    
    AC_SUBST(GLU32FILES)
    
        XLIB="-lXext -lX11"
    
        ac_save_CPPFLAGS="$CPPFLAGS"
        CPPFLAGS="$CPPFLAGS $X_CFLAGS"
    
        dnl *** All of the following tests require X11/Xlib.h
    
        AC_CHECK_HEADERS(X11/Xlib.h,
          [
    
            dnl *** Check for X keyboard extension
            AC_CHECK_HEADERS(X11/XKBlib.h,
                [ dnl *** If X11/XKBlib.h exists...
                  AC_CHECK_LIB(X11, XkbQueryExtension,
    
                  AC_DEFINE(HAVE_XKB, 1, [Define if you have the XKB extension]),,
    
                  $X_LIBS -lXext -lX11 $X_EXTRA_LIBS)
                ],
    
                AC_MSG_WARN([[Xkb extension not found, Wine will be built without it]])
    
            dnl *** Check for X Shm extension
            AC_CHECK_HEADERS(X11/extensions/XShm.h,
                [ dnl *** If X11/extensions/XShm.h exists...
                  AC_CHECK_LIB(Xext, XShmQueryExtension,
    
                  AC_DEFINE(HAVE_LIBXXSHM, 1, [Define if you have the X Shm extension]),,
    
                  $X_LIBS -lXext -lX11 $X_EXTRA_LIBS)
                ],
    
                AC_MSG_WARN([[XShm extension not found, Wine will be built without it]])
    
            dnl *** Check for X shape extension
    
            AC_CHECK_HEADERS(X11/extensions/shape.h,
    
                [ dnl *** If X11/extensions/shape.h exists...
                  AC_CHECK_LIB(Xext,XShapeQueryExtension,
    
    	      AC_DEFINE(HAVE_LIBXSHAPE, 1, [Define if you have the X Shape extension]),,
    
    	      $X_LIBS -lXext -lX11 $X_EXTRA_LIBS)
    	    ],
    
    	    AC_MSG_WARN([[XShape extension not found, Wine will be built without it]])
    
            dnl *** Check for XFree86 DGA / DGA 2.0 extension
            AC_CHECK_HEADERS(X11/extensions/xf86dga.h,
                [ dnl *** If X11/extensions/xf86dga.h exists, check 
                  dnl *** for XDGAQueryExtension()...
                  AC_CHECK_LIB(Xxf86dga, XDGAQueryExtension,
                    [ dnl *** If found...
    
                      AC_DEFINE(HAVE_LIBXXF86DGA2, 1,
                                [Define if you have the Xxf86dga library version 2])
    
                      X_PRE_LIBS="$X_PRE_LIBS -lXxf86dga"
                   ],
                    [ dnl *** If not found, look for XF86DGAQueryExtension()
                      dnl *** instead (DGA 2.0 not found)...
                      AC_CHECK_LIB(Xxf86dga, XF86DGAQueryExtension,
    
                        [ AC_DEFINE(HAVE_LIBXXF86DGA, 1,
                                    [Define if you have the Xxf86dga library version 1])
    
                          X_PRE_LIBS="$X_PRE_LIBS -lXxf86dga"
                        ],,
                        $X_LIBS -lXext -lX11 $X_EXTRA_LIBS
                      )
                    ],
                    $X_LIBS -lXext -lX11 $X_EXTRA_LIBS
                  )
                ],
    
                AC_MSG_WARN([[DGA extension not found, Wine will be built without it]])
    
            )
    
            dnl *** Check for XFree86 VMODE extension
            AC_CHECK_HEADERS(X11/extensions/xf86vmode.h,
                [ dnl *** If X11/extensions/xf86vmode.h exists...
                    AC_CHECK_LIB(Xxf86vm, XF86VidModeQueryExtension,
    
                      [ AC_DEFINE(HAVE_LIBXXF86VM, 1, [Define if you have the Xxf86vm library])
    
                         X_PRE_LIBS="$X_PRE_LIBS -lXxf86vm"
                      ],,
                      $X_LIBS -lXext -lX11 $X_EXTRA_LIBS
                    )
                ],
    
                AC_MSG_WARN([[XFree86 VMODE extension not found, Wine will be built without it]])
    
    
            dnl *** Check for XVideo extension supporting XvImages
            AC_CHECK_HEADERS(X11/extensions/Xvlib.h,
                [ dnl *** If X11/extensions/Xvlib.h exists...
                    AC_CHECK_LIB(Xv, XvShmCreateImage,
    
                      [ AC_DEFINE(HAVE_XVIDEO, 1, [Define if the X libraries support XVideo])
    
                         X_PRE_LIBS="$X_PRE_LIBS -lXv"
                      ],,
                      $X_LIBS -lXext -lX11 $X_EXTRA_LIBS
                    )
                ],
    
                AC_MSG_WARN([[XVideo extension not found, Wine will be built without it]])
    
            dnl *** Check for XRender extension
            AC_CHECK_HEADERS(X11/extensions/Xrender.h,
                [ dnl *** If X11/extensions/Xrender.h exists...
                    AC_CHECK_LIB(Xrender, XRenderQueryExtension,
                      [ AC_DEFINE(HAVE_LIBXRENDER, 1, [Define if you have the XRender extension library])
                         X_PRE_LIBS="$X_PRE_LIBS -lXrender"
                      ],,
                      $X_LIBS -lXext -lX11 $X_EXTRA_LIBS
                    )
                ],
    
                AC_MSG_WARN([[XRender extension not found, Wine will be built without it]])
    
          ]
        ) dnl *** End of X11/Xlib.h check
    
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        dnl Check for the presence of OpenGL
    
            if test -f /usr/X11R6/lib/libGL.a -a ! -f /usr/X11R6/lib/libGL.so
    
            then
    	    AC_MSG_ERROR([/usr/X11R6/lib/libGL.a is present on your system.
    This prevents linking to OpenGL. Delete the file and restart configure.])
            fi
    
    
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    	AC_CHECK_HEADERS(GL/gl.h GL/glx.h GL/glext.h)
    
    	if test "$ac_cv_header_GL_gl_h" = "yes" -a "$ac_cv_header_GL_glx_h" = "yes"
    
    	then
    	    dnl Check for some problems due to old Mesa versions
    
    	    AC_CACHE_CHECK([for up-to-date OpenGL version], wine_cv_opengl_version_OK,
    
    		[GLenum test = GL_UNSIGNED_SHORT_5_6_5;],
    
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    		[wine_cv_opengl_version_OK="yes"],
    		[wine_cv_opengl_version_OK="no"]
    
                )
    
    	    dnl Check for the thread-safety of the OpenGL library
    
    	    AC_CACHE_CHECK([for thread-safe OpenGL version], 
    
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    			   wine_cv_opengl_version_threadsafe,
    
                  [saved_libs=$LIBS
    	       LIBS="$X_LIBS -lGL"
    	       AC_TRY_LINK([],[pthread_getspecific();],
    
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    			      [wine_cv_opengl_version_threadsafe="yes"],
    			      [wine_cv_opengl_version_threadsafe="no"])
    
    	    if test "$wine_cv_opengl_version_OK" = "yes" -a \( "$wine_cv_opengl_version_threadsafe" = "no" -o "x$enable_opengl" = "xyes" \)
    
    		dnl Check for the presence of the library
    
    		AC_CHECK_LIB(GL,glXCreateContext,
    			     X_PRE_LIBS="$X_PRE_LIBS -lGL"
    			     ,,
    			     $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS)
    
    
    		if test "$ac_cv_lib_GL_glXCreateContext" = "yes"
    
    			OPENGLFILES='$(OPENGLFILES)'
    
    			AC_DEFINE(HAVE_OPENGL, 1, [Define if OpenGL is present on the system])
    
    			AC_CHECK_LIB(GL,glXGetProcAddressARB,
                                         AC_DEFINE(HAVE_GLX_GETPROCADDRESS, 1,
                                                   [Define if the OpenGL library supports the glXGetProcAddressARB call]),,
                                         $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS)
    
    			if test "$ac_cv_lib_GL_glXGetProcAddressARB" = "yes"
    
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    			then
    
    			       AC_CACHE_CHECK([for OpenGL extension functions prototypes], wine_cv_extension_prototypes,
    			          [AC_TRY_COMPILE([#include <GL/gl.h>
    
    				  		  #ifdef HAVE_GL_GLEXT_H
    						  # include <GL/glext.h>
    						  #endif
    						  ],
    
    						 [PFNGLCOLORTABLEEXTPROC test_proc;],
    
    						 [wine_cv_extension_prototypes="yes"],
    
    						 [wine_cv_extension_prototypes="no"]
    
    				if test "$wine_cv_extension_prototypes" = "yes"
    
    				    AC_DEFINE(HAVE_GLEXT_PROTOTYPES, 1,
                                                  [Define if the OpenGL headers define extension typedefs])
    
    	        dnl Check for GLU32 library.
    
    			     [X_PRE_LIBS="$X_PRE_LIBS -lGLU"
    			     GLU32FILES='$(GLU32FILES)']
    
    			     ,,
    			     $X_LIBS $X_PRE_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS
    		)
    
    
        CPPFLAGS="$ac_save_CPPFLAGS"
    
        XFILES='$(XFILES)'
    
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    dnl **** Check which curses lib to use ***
    
            [AC_CHECK_LIB(ncurses,waddch,
    
                [AC_DEFINE(HAVE_LIBNCURSES, 1, [Define if you have the ncurses library (-lncurses)])
                 CURSESLIBS="-lncurses"],
                 [AC_CHECK_HEADERS(curses.h,
                     [AC_CHECK_LIB(curses,waddch,
                         [AC_DEFINE(HAVE_LIBCURSES, 1, [Define if you have the curses library (-lcurses)])
    
                          CURSESLIBS="-lcurses"])])])])
    
        saved_libs="$LIBS"
        LIBS="$CURSESLIBS $LIBS"
    
    CUPSLIBS=""
    dnl **** Check for CUPS ****
    
    AC_CHECK_LIB(cups,cupsGetPPD,
    
    	[AC_CHECK_HEADER(cups/cups.h,
    	    [AC_DEFINE(HAVE_CUPS, 1, [Define if we have CUPS])
    	    CUPSLIBS="-lcups"],
                wine_cv_warn_cups_h=yes)]
    
    )
    AC_SUBST(CUPSLIBS)
    
    
    dnl **** Check for FreeType 2 ****
    
    AC_CHECK_LIB(freetype,FT_Init_FreeType,ft_lib=yes,ft_lib=no,$X_LIBS)
    
    if test "$ft_lib" = "no"
    then
        FREETYPELIBS=""
        FREETYPEINCL=""
        wine_cv_msg_freetype=no
    else
    
        AC_CHECK_PROG(ft_devel,freetype-config,freetype-config,no)
        if test "$ft_devel" = "no"
        then
            AC_CHECK_PROG(ft_devel2,freetype2-config,freetype2-config,no)
            if test "$ft_devel2" = "freetype2-config"
    	then
    		ft_devel=$ft_devel2
    	fi
        fi
    
        if test "$ft_devel" = "no"
        then
        	FREETYPELIBS=""
    	FREETYPEINCL=""
    	wine_cv_msg_freetype=yes
        else
    
    	FREETYPELIBS=`$ft_devel --libs`
    	FREETYPEINCL=`$ft_devel --cflags`
    
    	ac_save_CPPFLAGS="$CPPFLAGS"
    	CPPFLAGS="$FREETYPEINCL $CPPFLAGS"
    	AC_CHECK_HEADERS(freetype/freetype.h \
                             freetype/ftglyph.h \
                             freetype/tttables.h \
                             freetype/ftnames.h \
                             freetype/ftsnames.h \
    
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                             freetype/ftoutln.h \
                             freetype/internal/sfnt.h)
    
    	AC_TRY_CPP([#include <ft2build.h>
                        #include <freetype/fttrigon.h>],
    
                        [AC_DEFINE(HAVE_FREETYPE_FTTRIGON_H, 1,
              [Define if you have the <freetype/fttrigon.h> header file.])
                        wine_cv_fttrigon=yes],
                        wine_cv_fttrigon=no)
    
    	CPPFLAGS="$ac_save_CPPFLAGS"
    
    	dnl Check that we have at least freetype/freetype.h
    
    	if test "$ac_cv_header_freetype_freetype_h" = "yes" -a "$wine_cv_fttrigon" = "yes"
    
    	then
    	    AC_DEFINE(HAVE_FREETYPE, 1, [Define if FreeType 2 is installed])
    	    wine_cv_msg_freetype=no
    	else
    	    FREETYPELIBS=""
    	    FREETYPEINCL=""
    	    wine_cv_msg_freetype=yes
    	fi
    
        fi
    fi
    AC_SUBST(FREETYPELIBS)
    AC_SUBST(FREETYPEINCL)
    
    
    dnl **** Check for parport (currently Linux only) ****
    
    AC_CACHE_CHECK([for parport header/ppdev.h], ac_cv_c_ppdev,
    
     AC_TRY_COMPILE(
       [#include <linux/ppdev.h>],
       [ioctl (1,PPCLAIM,0)],
       [ac_cv_c_ppdev="yes"],
       [ac_cv_c_ppdev="no"])
     )
    if test "$ac_cv_c_ppdev" = "yes"
    then
    
        AC_DEFINE(HAVE_PPDEV, 1, [Define if we can use ppdev.h for parallel port access])
    
    dnl **** Check for IPX (currently Linux only) ****
    
    AC_CACHE_CHECK([for GNU style IPX support], ac_cv_c_ipx_gnu,
    
     AC_TRY_COMPILE(
       [#include <sys/socket.h>
        #include <netipx/ipx.h>],
       [((struct sockaddr_ipx *)0)->sipx_family == AF_IPX],
    
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       [ac_cv_c_ipx_gnu="yes"],
    
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    if test "$ac_cv_c_ipx_gnu" = "yes"
    then
    
        AC_DEFINE(HAVE_IPX_GNU, 1, [Define if IPX should use netipx/ipx.h from libc])
    
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    fi
    
     AC_CACHE_CHECK([for linux style IPX support], ac_cv_c_ipx_linux,
    
      AC_TRY_COMPILE(
        [#include <sys/socket.h>
         #include <asm/types.h>
         #include <linux/ipx.h>],
        [((struct sockaddr_ipx *)0)->sipx_family == AF_IPX],
    
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        [ac_cv_c_ipx_linux="yes"],
    
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      if test "$ac_cv_c_ipx_linux" = "yes"
      then
    
          AC_DEFINE(HAVE_IPX_LINUX, 1, [Define if IPX includes are taken from Linux kernel])
    
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      fi
    
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    dnl **** Check for Open Sound System ****
    
    AC_CHECK_HEADERS(sys/soundcard.h machine/soundcard.h soundcard.h, break)
    
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    AC_CACHE_CHECK([for Open Sound System],
    
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    	ac_cv_c_opensoundsystem,
    
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    	AC_TRY_COMPILE([
    
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    		#include <sys/soundcard.h>
    
    	#elif defined(HAVE_MACHINE_SOUNDCARD_H)
    
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    		#include <machine/soundcard.h>
    
    	#elif defined(HAVE_SOUNDCARD_H)
    		#include <soundcard.h>
    
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    	#endif
    	],[
    
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    /* check for one of the Open Sound System specific SNDCTL_ defines */
    #if !defined(SNDCTL_DSP_STEREO)
    #error No open sound system
    #endif
    
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    ],ac_cv_c_opensoundsystem="yes",ac_cv_c_opensoundsystem="no"))
    
    if test "$ac_cv_c_opensoundsystem" = "yes"
    then
    
        AC_DEFINE(HAVE_OSS, 1, [Define if you have the Open Sound system])
    
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    fi
    
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    AC_CACHE_CHECK([for Open Sound System/MIDI interface],
    
    	ac_cv_c_opensoundsystem_midi,
    	AC_TRY_COMPILE([
    	#if defined(HAVE_SYS_SOUNDCARD_H)
    		#include <sys/soundcard.h>
    	#elif defined(HAVE_MACHINE_SOUNDCARD_H)
    		#include <machine/soundcard.h>
    	#elif defined(HAVE_SOUNDCARD_H)
    		#include <soundcard.h>
    	#endif
    	],[
    
    /* check for one of the Open Sound System specific SNDCTL_SEQ defines */
    #if !defined(SNDCTL_SEQ_SYNC)
    #error No open sound system MIDI interface
    #endif
    ],ac_cv_c_opensoundsystem_midi="yes",ac_cv_c_opensoundsystem_midi="no"))
    
    if test "$ac_cv_c_opensoundsystem_midi" = "yes"
    then
    
        AC_DEFINE(HAVE_OSS_MIDI, 1, [Define if you have the Open Sound system (MIDI interface)])
    
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    dnl **** Check for aRts Sound Server ****
    AC_PATH_PROG(ARTSCCONFIG, artsc-config)
    AC_CACHE_CHECK([for aRts Sound server],
            ac_cv_c_artsserver,
            if test x$ARTSCCONFIG = x -o x$ARTSCCONFIG = x'"$ARTSCCONFIG"';
            then
                ac_cv_c_artsserver=no
            else
                ARTSC_CFLAGS=`$ARTSCCONFIG --cflags`
                ARTSC_LIBS=`$ARTSCCONFIG --libs`
                ac_cv_c_artsserver=no
                save_CFLAGS="$CFLAGS"
                CFLAGS="$CFLAGS $ARTSC_CFLAGS"
                AC_TRY_COMPILE([
                 #include <artsc.h>
                ],[
                 arts_stream_t stream;
                ],[
                ac_cv_c_artsserver=yes
                ])
                CFLAGS="$save_CFLAGS"
            fi)
    
    if test "$ac_cv_c_artsserver" = "yes"
    then
        AC_SUBST(ARTSLIBS, $ARTSC_LIBS)
        AC_SUBST(ARTSINCL, $ARTSC_CFLAGS)
    
        AC_DEFINE(HAVE_ARTS, 1, [Define if you have ARTS sound server])
    fi
    
    
    dnl **** Check for broken glibc mmap64 ****
    
    
    AC_CACHE_CHECK( [whether mmap64 works defined as mmap], ac_cv_mmap64_works,
    
    	AC_TRY_RUN([
    		#define _FILE_OFFSET_BITS 64
    		#include <stdio.h>
    		#include <unistd.h>
    		#include <fcntl.h>
    		#include <sys/mman.h>
    		#include <errno.h>
    
    		int main(int argc,char **argv) {
    			int fd = open("conftest.map",O_CREAT|O_RDWR,0600);
    			if (fd == -1) exit(1);
    
    			unlink("conftest.map");
    
    			write(fd,"test",4);
    
    			if ((-1 == mmap(0,4,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0)) &&
    			    (errno == EINVAL)
    			) {
    				exit(1);
    			}
    			close(fd);
    			fprintf(stderr,"success!\n");
    			exit(0);
    		}
    
    	],
        ac_cv_mmap64_works="yes",
        ac_cv_mmap64_works="no",
        ac_cv_mmap64_works="no") )
    
    if test "$ac_cv_mmap64_works" = "yes"
    then
        AC_DEFINE(_FILE_OFFSET_BITS, 64, [Set this to 64 to enable 64-bit file support on Linux])
    fi
    
    
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    dnl **** Check for gcc strength-reduce bug ****
    
    if test "x${GCC}" = "xyes"
    then
      CFLAGS="$CFLAGS -Wall"
    
      AC_CACHE_CHECK( [for gcc strength-reduce bug], ac_cv_c_gcc_strength_bug,
    
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                      AC_TRY_RUN([
    
    int	L[[4]] = {0,1,2,3};
    
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    int main(void) {
    
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      static int Array[[3]];
    
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      unsigned int B = 3;
      int i;
    
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      for(i=0; i<B; i++) Array[[i]] = i - 3;
    
      for(i=0; i<4 - 1; i++) L[[i]] = L[[i + 1]];
      L[[i]] = 4;
      
      exit( Array[[1]] != -2 || L[[2]] != 3);
    
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    }],
        ac_cv_c_gcc_strength_bug="no",
        ac_cv_c_gcc_strength_bug="yes",
        ac_cv_c_gcc_strength_bug="yes") )
      if test "$ac_cv_c_gcc_strength_bug" = "yes"
      then
        CFLAGS="$CFLAGS -fno-strength-reduce"
      fi
    
    
      dnl Check for -mpreferred-stack-boundary
    
      AC_CACHE_CHECK([for gcc -mpreferred-stack-boundary=2 support],
    
                     ac_cv_c_gcc_stack_boundary,
      [saved_cflags=$CFLAGS
      CFLAGS="$CFLAGS -mpreferred-stack-boundary=2"
      AC_TRY_COMPILE(,[return 0],ac_cv_c_gcc_stack_boundary="yes",ac_cv_c_gcc_stack_boundary="no")
      CFLAGS=$saved_cflags
      ])
      if test "$ac_cv_c_gcc_stack_boundary" = "yes"
      then
        CFLAGS="$CFLAGS -mpreferred-stack-boundary=2"
      fi
    
    dnl **** Check if we need to place .type inside a .def directive ****
    
    
    AC_CACHE_CHECK([whether .type must sit inside a .def directive],
    
    	       ac_cv_c_type_in_def,
    [saved_libs=$LIBS
    LIBS="conftest_asm.s $LIBS"
    cat > conftest_asm.s <<EOF
    	.globl _ac_test
    	.def _ac_test; .scl 2; .type 32; .endef
    _ac_test:
    	.long 0
    EOF
    AC_TRY_LINK(,,ac_cv_c_type_in_def="yes",ac_cv_c_type_in_def="no")
    LIBS=$saved_libs])
    if test "$ac_cv_c_type_in_def" = "yes"
    then
    
      AC_DEFINE(NEED_TYPE_IN_DEF, 1, [Define if .type asm directive must be inside a .def directive])
    
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    dnl **** Check for underscore on external symbols ****
    
    
    AC_CACHE_CHECK([whether external symbols need an underscore prefix],
    
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                   ac_cv_c_extern_prefix,
    [saved_libs=$LIBS
    LIBS="conftest_asm.s $LIBS"
    cat > conftest_asm.s <<EOF
    	.globl _ac_test
    _ac_test:
    	.long 0
    EOF
    AC_TRY_LINK([extern int ac_test;],[if (ac_test) return 1],
                ac_cv_c_extern_prefix="yes",ac_cv_c_extern_prefix="no")
    LIBS=$saved_libs])
    if test "$ac_cv_c_extern_prefix" = "yes"
    then
    
      AC_DEFINE(NEED_UNDERSCORE_PREFIX, 1,
                [Define if symbols declared in assembly code need an underscore prefix])
    
    dnl **** Check whether stdcall symbols need to be decorated ****
    
    AC_CACHE_CHECK([whether stdcall symbols need to be decorated],
                   ac_cv_c_stdcall_decoration,
    [saved_libs=$LIBS
    LIBS="conftest_asm.s $LIBS"
    if test "$ac_cv_c_extern_prefix" = "yes"
    then
    cat > conftest_asm.s <<EOF
    	.globl _ac_test@0
    _ac_test@0:
    EOF
    else
    cat > conftest_asm.s <<EOF
    	.globl ac_test@0
    ac_test@0:
    EOF
    fi
    AC_TRY_LINK([extern void __attribute__((__stdcall__)) ac_test(void);],
                [ac_test(); return 0],
                ac_cv_c_stdcall_decoration="yes",ac_cv_c_stdcall_decoration="no")
    LIBS=$saved_libs])
    if test "$ac_cv_c_stdcall_decoration" = "yes"
    then
      AC_DEFINE(NEED_STDCALL_DECORATION, 1,
                [Define if stdcall symbols need to be decorated])
    fi
    
    
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    dnl **** Check for .string in assembler ****
    
    
    AC_CACHE_CHECK([whether assembler accepts .string],
    
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                   ac_cv_c_asm_string,
    [saved_libs=$LIBS
    LIBS="conftest_asm.s $LIBS"
    cat > conftest_asm.s <<EOF
    	.string "test"
    EOF
    AC_TRY_LINK(,,ac_cv_c_asm_string="yes",ac_cv_c_asm_string="no")
    LIBS=$saved_libs])
    if test "$ac_cv_c_asm_string" = "yes"
    then
    
      AC_DEFINE(HAVE_ASM_STRING, 1, [Define to use .string instead of .ascii])
    
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    dnl **** Check for working dll ****
    
    
    LDDLLFLAGS=""
    
    if test "$LIBEXT" = "so"
    
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    then
    
      AC_CACHE_CHECK([whether we can build a GNU style ELF dll],
    
                     ac_cv_c_dll_gnuelf,
    
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      [saved_cflags=$CFLAGS
    
      CFLAGS="$CFLAGS -fPIC -shared -Wl,-soname,conftest.so.1.0,-Bsymbolic"
    
      AC_TRY_LINK(,[return 1],ac_cv_c_dll_gnuelf="yes",ac_cv_c_dll_gnuelf="no")
    
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      CFLAGS=$saved_cflags
      ])
    
      if test "$ac_cv_c_dll_gnuelf" = "yes"
    
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      then
    
        LDSHARED="\$(CC) -shared \$(SONAME:%=-Wl,-soname,%)"
    
        LDDLLFLAGS="-Wl,-Bsymbolic"
    
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      else
    
        AC_CACHE_CHECK(whether we can build a UnixWare (Solaris) dll,
    
        CFLAGS="$CFLAGS -fPIC -Wl,-G,-h,conftest.so.1.0,-B,symbolic"
    
        AC_TRY_LINK(,[return 1],ac_cv_c_dll_unixware="yes",ac_cv_c_dll_unixware="no")
    
        if test "$ac_cv_c_dll_unixware" = "yes"
    
          LDSHARED="\$(CC) -Wl,-G \$(SONAME:%=-Wl,-h,%)"
    
          LDDLLFLAGS="-Wl,-B,symbolic"
    
      if test "$ac_cv_c_dll_gnuelf" = "no" -a "$ac_cv_c_dll_unixware" = "no"
    
        AC_CHECK_PROG(DLLWRAP,dllwrap,dllwrap,false)
    
        if test "$DLLWRAP" = "dllwrap"; then
          dnl FIXME - check whether dllwrap works correctly...
    
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      fi
    fi
    
    if test "$LIBEXT" = "a"; then
    
      AC_MSG_ERROR(
    [could not find a way to build shared libraries.
    It is currently not possible to build Wine without shared library
    (.so) support to allow transparent switch between .so and .dll files.
    If you are using Linux, you will need a newer binutils.]
    )
    
    DLLFLAGS=""
    
    if test "$LIBEXT" = "so"; then
        DLLFLAGS="-fPIC"
    
        LDPATH="LD_LIBRARY_PATH=\"\$(TOPOBJDIR)/unicode:\$\$LD_LIBRARY_PATH\""
    elif test "$LIBEXT" = "dll"; then
        #DLLFLAGS="-fPIC" # -fPIC doesn't work(at least in cygwin-b20) - FIXME
    
        LDPATH="PATH=\"\$(TOPOBJDIR)/unicode:\$\$PATH\""
    
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    AC_SUBST(DLLFLAGS)
    
    AC_SUBST(LDDLLFLAGS)
    
    AC_SUBST(LIBEXT)
    
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    dnl **** Check for reentrant libc ****
    dnl
    dnl For cross-compiling we blindly assume that libc is reentrant. This is
    dnl ok since non-reentrant libc is quite rare (mostly old libc5 versions).
    
    
    AC_DEFUN([WINE_CHECK_ERRNO],
    
    [
      AC_CACHE_CHECK(for reentrant libc: $1, wine_cv_libc_r_$1,
    
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      [AC_TRY_RUN([int myerrno = 0;
    char buf[256];
    
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    main(){connect(0,buf,255); exit(!myerrno);}],
    
      wine_cv_libc_r_$1=yes, wine_cv_libc_r_$1=no,
      wine_cv_libc_r_$1=yes )
    
    if test "$wine_cv_libc_r_$1" = "yes"
    
    
    wine_cv_libc_reentrant=no 
    dnl Linux style errno location
    WINE_CHECK_ERRNO(__errno_location)
    dnl FreeBSD style errno location
    WINE_CHECK_ERRNO(__error)
    
    dnl Solaris style errno location
    
    dnl UnixWare style errno location
    
    WINE_CHECK_ERRNO(__thr_errno)
    
    dnl NetBSD style errno location
    WINE_CHECK_ERRNO(__errno)
    
    
    if test "$wine_cv_libc_reentrant" != "no" 
    
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    then
    
      AC_DEFINE_UNQUOTED(ERRNO_LOCATION,$wine_cv_libc_reentrant,
    	             [Define to the name of the function returning errno for reentrant libc])
    
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    dnl **** Check for reentrant X libraries ****
    dnl
    dnl This may fail to determine whether X libraries are reentrant if
    dnl AC_PATH_XTRA does not set x_libraries. In this case manual configuration
    dnl is possible with the --without-reentrant-x option.
    
    
    if test "$have_x" = "yes" -a "$wine_cv_libc_reentrant" != "no"
    
    AC_CACHE_CHECK( [for reentrant X libraries], wine_cv_x_reentrant,
    
      [ if test "x$with_reentrant_x" = "xno" 
    
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        then
            wine_cv_x_reentrant=no
        else
    
    	libX11_check=none
    
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    	for dir in "$x_libraries" /usr/lib /usr/local/lib /lib; do
    
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    	    if test -r $dir/libX11.so; then
    
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    		libX11_check="-D $dir/libX11.so"
    		break 1
    	    fi
    
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    	    if test -r $dir/libX11.a; then
    
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    		libX11_check="$dir/libX11.a"
    		break 1
    	    fi
    	done
    	if test "$libX11_check" != "none"; then
    
    	    if nm $libX11_check | grep $wine_cv_libc_reentrant >/dev/null 2>&1
    
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    	    then
    
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    		wine_cv_x_reentrant=yes
    	    else
    		wine_cv_x_reentrant=no
    	    fi
    	else
    	    wine_cv_x_reentrant=unknown
    	fi
        fi ] )
    
    else
        wine_cv_x_reentrant=no
    fi
    
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    if test "$wine_cv_x_reentrant" = "no"
    then
    
      AC_DEFINE(NO_REENTRANT_X11, 1,
                [Define if X libraries are not reentrant (compiled without -D_REENTRANT)])
    
    dnl **** Check for functions ****
    
    
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    AC_FUNC_ALLOCA()
    
    	ftruncate64 \
    
    	getnetbyaddr \
    	getnetbyname \
    
    	getprotobyname \
    	getprotobynumber \
    
    	getrlimit \
    
    	getservbyport \
    	getsockopt \
    	inet_network \
    
    	mmap \
    
    	tcgetattr \
    	timegm \
    	usleep \
    	vfscanf \
    	wait4 \
    	waitpid \
    )
    
    dnl **** Check for header files ****
    
    AC_CHECK_HEADERS(\
    
    	linux/ucdrom.h \
    	net/if.h \
    
    	netdb.h \
    
    	netinet/in_systm.h \
    	netinet/ip.h \
    
    	sys/file.h \
    	sys/filio.h \
    
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    	sys/link.h \
    
    	sys/modem.h \
    	sys/mount.h \
    
    	sys/reg.h \
    
    	sys/sockio.h \
    	sys/statfs.h \
    	sys/strtio.h \
    	sys/syscall.h \
    
    	sys/wait.h \
    	sys/v86.h \
    	sys/v86intr.h \
    
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    AC_HEADER_STAT()
    
    AC_C_CONST
    AC_C_INLINE
    AC_TYPE_MODE_T
    AC_TYPE_OFF_T
    AC_TYPE_PID_T
    AC_TYPE_SIZE_T
    
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    AC_CHECK_SIZEOF(long long,0)
    
    
    AC_CACHE_CHECK([whether linux/input.h is for real],
    
    	wine_cv_linux_input_h,
    	AC_TRY_COMPILE([
    	    #include <linux/input.h>
    	] , [
    	    int foo = EVIOCGBIT(EV_ABS,42);
    	    int bar = BTN_PINKIE;
    	    int fortytwo = 42;
    	],
    	wine_cv_linux_input_h=yes,
    	wine_cv_linux_input_h=no,
    	no
    	)