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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_INIT([Wine],WINE_VERSION,[wine-devel@winehq.org])
    
    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 ****
    
    
    AC_ARG_ENABLE(win16, AC_HELP_STRING([--disable-win16],[do not include Win16 support]))
    
    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_WITH(opengl,    AC_HELP_STRING([--without-opengl],[do not use OpenGL]))
    
    AC_ARG_WITH(curses,    AC_HELP_STRING([--without-curses],[do not use curses]))
    AC_ARG_WITH(wine-tools,AC_HELP_STRING([--with-wine-tools=<dir>],[use Wine tools from directory <dir>]))
    
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    AC_SUBST(WIN16_FILES,"\$(WIN16_FILES)")
    AC_SUBST(WIN16_INSTALL,"\$(WIN16_INSTALL)")
    if test "x$enable_win16" = "xno"
    then
      WIN16_FILES=""
      WIN16_INSTALL=""
    fi
    
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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
    
    dnl We can't use AC_PROG_CPP for winegcc, it uses by default $(CC) -E
    AC_CHECK_TOOL(CPPBIN,cpp,cpp)
    
    
    AC_CACHE_CHECK([for the directory containing the Wine tools], wine_cv_toolsdir,
      [if test -z "$with_wine_tools"; then
         if test "$cross_compiling" = "yes"; then
           AC_MSG_ERROR([you must use the --with-wine-tools option when cross-compiling.])
         else
           wine_cv_toolsdir="\$(TOPOBJDIR)"
         fi
       elif test -d "$with_wine_tools/tools/winebuild"; then
         case $with_wine_tools in
           /*) wine_cv_toolsdir="$with_wine_tools" ;;
           *)  wine_cv_toolsdir="\$(TOPOBJDIR)/$with_wine_tools" ;;
         esac
       else
         AC_MSG_ERROR([could not find Wine tools in $with_wine_tools.])
       fi])
    AC_SUBST(TOOLSDIR,$wine_cv_toolsdir)
    
    
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    AC_PATH_XTRA
    
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    AC_PROG_LEX
    
    dnl **** Just additional warning checks, since AC_PROG just sets 'lex' even
    
    dnl **** without one present.
    
    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.])
    
    dnl Check for bison
    AC_CHECK_PROGS(BISON,bison,none)
    if test "$BISON" = "none"
    then
      AC_MSG_ERROR([no suitable bison found. Please install the 'bison' package.])
    fi
    
    
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    AC_PROG_RANLIB
    
    AC_CHECK_TOOL(STRIP,strip,strip)
    AC_CHECK_TOOL(WINDRES,windres,false)
    
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    AC_PROG_LN_S
    
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    WINE_PROG_LN
    
    AC_PATH_PROG(LDCONFIG, ldconfig, true, [/sbin /usr/sbin $PATH])
    
    AC_PROG_INSTALL
    dnl Prepend src dir to install path dir if it's a relative path
    case "$INSTALL" in
    
      [[\\/$]]* | ?:[[\\/]]* ) ;;
    
      *)  INSTALL="\\\$(TOPSRCDIR)/$INSTALL" ;;
    esac
    
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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)
    
    
    dnl Check for db2html
    AC_CHECK_PROGS(DB2HTML, docbook2html db2html, false)
    AC_SUBST(DB2HTML)
    
    dnl Check for db2pdf
    AC_CHECK_PROGS(DB2PDF, docbook2pdf db2pdf, false)
    AC_SUBST(DB2PDF)
    
    dnl Check for db2ps
    AC_CHECK_PROGS(DB2PS, docbook2ps db2ps, false)
    AC_SUBST(DB2PS)
    
    
    dnl Check for db2txt
    AC_CHECK_PROGS(DB2TXT, docbook2txt db2txt, false)
    AC_SUBST(DB2TXT)
    
    
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    dnl **** Check for some libraries ****
    
    
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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))
    
    AC_CHECK_FUNCS(gethostbyname,,AC_CHECK_LIB(nsl,gethostbyname))
    
    dnl Check for -lsocket for Solaris
    
    AC_CHECK_FUNCS(connect,,AC_CHECK_LIB(socket,connect))
    
    dnl Check for -lresolv for Solaris
    
    AC_CHECK_FUNCS(inet_aton,,AC_CHECK_LIB(resolv,inet_aton))
    
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    dnl Check for -lxpg4 for FreeBSD
    
    AC_CHECK_LIB(xpg4,_xpg4_setrunelocale)
    
    dnl Check for -lpoll for Mac OS X/Darwin
    AC_CHECK_LIB(poll,poll)
    
    dnl Check for -lpthread
    AC_CHECK_LIB(pthread,pthread_create,AC_SUBST(LIBPTHREAD,"-lpthread"))
    
    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(GIFLIB,"")
    AC_CHECK_HEADERS(gif_lib.h,
        AC_CHECK_LIB(ungif,DGifOpen,
            [AC_DEFINE(HAVE_LIBGIF,1,[Define if you have libgif/libungif including devel headers])
             GIFLIB="-lungif"],
            [AC_CHECK_LIB(gif,DGifOpen,
                          [AC_DEFINE(HAVE_LIBGIF,1)
                           GIFLIB="-lgif"])]))
    
    
    AC_SUBST(XFILES)
    XFILES=""
    
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    AC_SUBST(OPENGLFILES)
    OPENGLFILES=""
    
    AC_SUBST(GLU32FILES)
    
    AC_SUBST(OPENGL_LIBS)
    OPENGL_LIBS=""
    
        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,
          [
    
            AC_CHECK_HEADERS([X11/XKBlib.h \
                              X11/Xutil.h \
                              X11/extensions/shape.h \
    
                              X11/extensions/XInput.h \
    
                              X11/extensions/XShm.h \
                              X11/extensions/Xrandr.h \
                              X11/extensions/Xrender.h \
                              X11/extensions/Xvlib.h \
                              X11/extensions/xf86dga.h \
                              X11/extensions/xf86vmode.h],,,
                             [#include <X11/Xlib.h>
                              #ifdef HAVE_X11_XUTIL_H
                              # include <X11/Xutil.h>
                              #endif])
    
    
            dnl *** Check for X keyboard extension
    
            if test "$ac_cv_header_X11_XKBlib_h" = "yes"
            then
    
                  AC_CHECK_LIB(X11, XkbQueryExtension,
    
                  AC_DEFINE(HAVE_XKB, 1, [Define if you have the XKB extension]),,
    
                  $X_LIBS -lXext -lX11 $X_EXTRA_LIBS)
    
            dnl *** Check for X Shm extension
    
            if test "$ac_cv_header_X11_extensions_XShm_h" = "yes"
            then
    
                  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)
    
            dnl *** Check for X shape extension
    
            if test "$ac_cv_header_X11_extensions_shape_h" = "yes"
            then
    
                  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)
    
            dnl *** Check for XFree86 DGA / DGA 2.0 extension
    
            if test "$ac_cv_header_X11_extensions_xf86dga_h" = "yes"
            then
    
                  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)
            fi
    
    
            dnl *** Check for XFree86 VMODE extension
    
            if test "$ac_cv_header_X11_extensions_xf86vmode_h" = "yes"
            then
    
                    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)
            fi
    
            dnl *** Check for X RandR extension
    
            if test "$ac_cv_header_X11_extensions_Xrandr_h" = "yes"
            then
    
                    AC_TRY_COMPILE([#include <X11/Xlib.h>
    #include <X11/extensions/Xrandr.h>],[static typeof(XRRSetScreenConfigAndRate) * func;],
                      [AC_DEFINE(HAVE_LIBXRANDR, 1, [Define if you have the Xrandr library])])
    
            dnl *** Check for XVideo extension supporting XvImages
    
            if test "$ac_cv_header_X11_extensions_Xvlib_h" = "yes"
            then
    
                    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)
            fi
    
          ]
        ) dnl *** End of X11/Xlib.h check
    
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        dnl Check for the presence of OpenGL
    
        if test "x$with_opengl" != "xno"
    
            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
    
    
    	AC_CHECK_HEADERS(GL/gl.h GL/glx.h)
    
    	if test "$ac_cv_header_GL_gl_h" = "yes" -a "$ac_cv_header_GL_glx_h" = "yes"
    
                AC_CHECK_HEADERS(GL/glext.h,,,[#include <GL/glx.h>])
    
    	    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"]
    
    	    if test "$wine_cv_opengl_version_OK" = "yes"
    
    		dnl Check for the presence of the library
    
    		AC_CHECK_LIB(GL,glXCreateContext,
    
    			     OPENGL_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.
    
    			     [OPENGL_LIBS="$OPENGL_LIBS -lGLU"
    
    			     GLU32FILES='$(GLU32FILES)']
    
    			     $OPENGL_LIBS $X_LIBS $X_PRE_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS
    
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                 dnl Check for glut32 library.
                 AC_CHECK_LIB(glut,glutMainLoop,
    
                           [AC_SUBST(GLUT_LIBS,"-lglut -lXmu -lXi")
    
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                            AC_SUBST(GLUT32FILES,'$(GLUT32FILES)')],,
    
                            $OPENGL_LIBS $X_LIBS $X_PRE_LIBS -lXmu -lXi -lX11 $X_EXTRA_LIBS)
    
        dnl **** Check for NAS ****
        AC_SUBST(NASLIBS,"")
        AC_CHECK_HEADERS(audio/audiolib.h,
             [AC_CHECK_HEADERS(audio/soundlib.h,,,[#include <audio/audiolib.h>])
              AC_CHECK_LIB(audio,AuCreateFlow,
                           [AC_DEFINE(HAVE_NAS,1,[Define if you have NAS including devel headers])
                            NASLIBS="-laudio -lXt $X_LIBS -lXext -lX11 $X_EXTRA_LIBS"],,
                           [-lXt $X_LIBS -lXext -lX11 $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"
    
    dnl **** Check for SANE ****
    AC_CHECK_PROG(sane_devel,sane-config,sane-config,no)
    if test "$sane_devel" = "no"
    then
        SANELIBS=""
        SANEINCL=""
    else
        SANELIBS="`$sane_devel --libs`"
        SANEINCL="`$sane_devel --cflags`"
        ac_save_CPPFLAGS="$CPPFLAGS"
        ac_save_LIBS="$LIBS"
        CPPFLAGS="$CPPFLAGS $SANEINCL"
        LIBS="$LIBS $SANELIBS"
    
        AC_CHECK_HEADER(sane/sane.h,
                        [AC_CHECK_LIB(sane,sane_open,
                                      [AC_DEFINE(HAVE_SANE, 1, [Define if we have SANE development environment])],
                                      [SANELIBS=""
                                      SANEINCL=""])],
                        [SANELIBS=""
                        SANEINCL=""])
    
        LIBS="$ac_save_LIBS"
        CPPFLAGS="$ac_save_CPPFLAGS"
    fi
    AC_SUBST(SANELIBS)
    AC_SUBST(SANEINCL)
    
    
    dnl **** Check for the ICU library ****
    AC_CHECK_HEADERS(unicode/ubidi.h)
    if test "$ac_cv_header_unicode_ubidi_h" = "yes"
    then
    
        saved_libs="$LIBS"
        ICU_LIB_DIR="${ICU_LIB_DIR-/usr/lib}"
    
        ICUUC_LIB="${ICUUC_LIB-$ICU_LIB_DIR/libsicuuc.a}"
        ICUDATA_LIB="${ICUDATA_LIB-$ICU_LIB_DIR/libsicudata.a}"
        AC_MSG_CHECKING(whether can link with ICU libraries $ICUUC_LIB and $ICUDATA_LIB)
    
        LIBS="$LIBS $ICUUC_LIB $ICUDATA_LIB -lstdc++ -lgcc_s"
        AC_TRY_LINK([#include <unicode/ubidi.h>],[ubidi_open()],
                    [AC_DEFINE(HAVE_ICU,1,[Define to 1 if the ICU libraries are installed])
    
                     AC_SUBST(ICULIBS,"$ICUUC_LIB $ICUDATA_LIB -lstdc++ -lgcc_s")
                     AC_MSG_RESULT(yes)],
                    [AC_MSG_RESULT(no)])
    
    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
        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
    	FREETYPEINCL=""
    	wine_cv_msg_freetype=yes
        else
    
    	ac_save_CPPFLAGS="$CPPFLAGS"
    	CPPFLAGS="$FREETYPEINCL $CPPFLAGS"
    
    	AC_CHECK_HEADERS(ft2build.h \
                             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,,,
                             [#if HAVE_FT2BUILD_H
                              #include <ft2build.h>
                              #endif])
    
    	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
    	    FREETYPEINCL=""
    	    wine_cv_msg_freetype=yes
    	fi
    
        fi
    fi
    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 va_copy ****
    AC_CACHE_CHECK([for va_copy], ac_cv_c_va_copy,
     AC_TRY_LINK(
       [#include <stdarg.h>],
       [va_list ap1, ap2;
        va_copy(ap1,ap2);
       ],
       [ac_cv_c_va_copy="yes"],
       [ac_cv_c_va_copy="no"])
     )
    if test "$ac_cv_c_va_copy" = "yes"
    then
        AC_DEFINE(HAVE_VA_COPY, 1, [Define if we have va_copy])
    fi
    AC_CACHE_CHECK([for __va_copy], ac_cv_c___va_copy,
     AC_TRY_LINK(
       [#include <stdarg.h>],
       [va_list ap1, ap2;
        __va_copy(ap1,ap2);
       ],
       [ac_cv_c___va_copy="yes"],
       [ac_cv_c___va_copy="no"])
     )
    if test "$ac_cv_c___va_copy" = "yes"
    then
        AC_DEFINE(HAVE___VA_COPY, 1, [Define if we have __va_copy])
    fi
    
    
    dnl **** Check for sigsetjmp ****
    AC_CACHE_CHECK([for sigsetjmp], ac_cv_c_sigsetjmp,
     AC_TRY_LINK(
       [#include <setjmp.h>],
       [sigjmp_buf buf;
        sigsetjmp( buf, 1 );
        siglongjmp( buf, 1 );],
       [ac_cv_c_sigsetjmp="yes"],
       [ac_cv_c_sigsetjmp="no"])
     )
    if test "$ac_cv_c_sigsetjmp" = "yes"
    then
        AC_DEFINE(HAVE_SIGSETJMP, 1, [Define to 1 if you have the sigsetjmp (and siglongjmp) function])
    fi
    
    
    dnl **** Check for pthread_rwlock_t ****
    AC_CHECK_TYPES([pthread_rwlock_t, pthread_rwlockattr_t],,,[#define _GNU_SOURCE
    #include <pthread.h>])
    
    
    dnl **** Check for pthread_getattr_np ****
    ac_save_LIBS="$LIBS"
    LIBS="$LIBS $LIBPTHREAD"
    AC_CHECK_FUNCS(pthread_getattr_np)
    LIBS="$ac_save_LIBS"
    
    
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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)
    
    if test x$ARTSCCONFIG != x -a x$ARTSCCONFIG != x'"$ARTSCCONFIG"';
    
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    then
    
        ARTSC_CFLAGS=""
        for i in `$ARTSCCONFIG --cflags`
        do
          case "$i" in
            -I*) ARTSC_CFLAGS="$ARTSC_CFLAGS $i";;
          esac
        done
    
        ARTSC_LIBS=`$ARTSCCONFIG --libs`
        save_CFLAGS="$CFLAGS"
        CFLAGS="$CFLAGS $ARTSC_CFLAGS"
        AC_TRY_COMPILE([#include <artsc.h>],[arts_stream_t stream;],
            [AC_SUBST(ARTSLIBS, $ARTSC_LIBS)
             AC_SUBST(ARTSINCL, $ARTSC_CFLAGS)
             AC_DEFINE(HAVE_ARTS, 1, [Define if you have ARTS sound server])])
        CFLAGS="$save_CFLAGS"
    
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    fi
    
    
    dnl **** Check for ALSA ****
    AC_SUBST(ALSALIBS,"")
    
    AC_CHECK_HEADERS(alsa/asoundlib.h sys/asoundlib.h, break)
    if test "$ac_cv_header_sys_asoundlib_h" = "yes" -o "$ac_cv_header_alsa_asoundlib_h" = "yes"
    
    then
        AC_CHECK_LIB(asound,snd_pcm_open,
        	AC_DEFINE(HAVE_ALSA,1,[Define if you have ALSA including devel headers])
    	ALSALIBS="-lasound")
    fi
    
    
    dnl **** Check for libaudioio (which can be used to get solaris audio support) ****
    
    AC_SUBST(AUDIOIOLIBS,"")
    AC_CHECK_HEADERS(libaudioio.h,
        [AC_CHECK_LIB(audioio,AudioIOGetVersion,
                      [AUDIOIOLIBS="-laudioio"
                       AC_DEFINE(HAVE_LIBAUDIOIO, 1, [Define if you have libaudioIO])])])
    
    
    dnl **** Check for capi4linux ****
    
    AC_CHECK_HEADERS(capi20.h,[
    	AC_CHECK_HEADERS(linux/capi.h,[
    		AC_CHECK_LIB(capi20,capi20_register,[
    			AC_DEFINE(HAVE_CAPI4LINUX,1,[Define if you have capi4linux libs and headers])
    			AC_SUBST(CAPI4LINUXLIBS,"-lcapi20")
    		])
    	])
    ])
    
    
    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
    
    
    dnl **** Check for gcc specific options ****
    
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    if test "x${GCC}" = "xyes"
    then
    
      EXTRACFLAGS="-Wall -pipe"
    
      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
    
        EXTRACFLAGS="$EXTRACFLAGS -fno-strength-reduce"
    
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      fi
    
      dnl Check for -fshort-wchar
      AC_CACHE_CHECK([for gcc -fshort-wchar support], ac_cv_c_gcc_fshort_wchar,
          [WINE_TRY_CFLAGS([-fshort-wchar],
                          ac_cv_c_gcc_fshort_wchar="yes",ac_cv_c_gcc_fshort_wchar="no")])
      if test "$ac_cv_c_gcc_fshort_wchar" = "yes"
      then
          AC_DEFINE(CC_FLAG_SHORT_WCHAR, "-fshort-wchar", [Specifies the compiler flag that forces a short wchar_t])
      fi
    
    
      dnl Check for -mpreferred-stack-boundary
    
      AC_CACHE_CHECK([for gcc -mpreferred-stack-boundary=2 support], ac_cv_c_gcc_stack_boundary,
          [WINE_TRY_CFLAGS([-mpreferred-stack-boundary=2],
                          ac_cv_c_gcc_stack_boundary="yes",ac_cv_c_gcc_stack_boundary="no")])
    
      if test "$ac_cv_c_gcc_stack_boundary" = "yes"
      then
    
        EXTRACFLAGS="$EXTRACFLAGS -mpreferred-stack-boundary=2"
    
      dnl Check for -fno-strict-aliasing
      AC_CACHE_CHECK([for gcc -fno-strict-aliasing support], ac_cv_c_gcc_no_strict_aliasing,
          [WINE_TRY_CFLAGS([-fno-strict-aliasing],
                          ac_cv_c_gcc_no_strict_aliasing="yes",ac_cv_c_gcc_no_strict_aliasing="no")])
      if test "$ac_cv_c_gcc_no_strict_aliasing" = "yes"
      then
        EXTRACFLAGS="$EXTRACFLAGS -fno-strict-aliasing"
      fi
    
    
      dnl Check for -gstabs+ option
      AC_CACHE_CHECK([for gcc -gstabs+ support], ac_cv_c_gcc_gstabs,
          [WINE_TRY_CFLAGS([-gstabs+],ac_cv_c_gcc_gstabs="yes", ac_cv_c_gcc_gstabs="no")])
      if test "$ac_cv_c_gcc_gstabs" = "yes"
      then
    
      CFLAGS="$CFLAGS -Wpointer-arith -Werror"
      AC_CACHE_CHECK([for broken string.h that generates warnings], ac_cv_c_string_h_warnings,
          AC_TRY_COMPILE([#include <string.h>],[],
                         [ac_cv_c_string_h_warnings=no],[ac_cv_c_string_h_warnings=yes]))
    
      if test "$ac_cv_c_string_h_warnings" = "no"
      then
    
        EXTRACFLAGS="$EXTRACFLAGS -Wpointer-arith"
    
    dnl **** Check how to define a function in assembly code ****
    
    AC_CACHE_CHECK([how to define a function in assembly code], ac_cv_asm_func_def,
      WINE_TRY_ASM_LINK(
          ["\t.globl _ac_test\n\t.def _ac_test; .scl 2; .type 32; .endef\n_ac_test:\t.long 0"],,,
          ac_cv_asm_func_def=".def",
        [WINE_TRY_ASM_LINK(["\t.globl _ac_test\n\t.type _ac_test,@function\n_ac_test:\t.long 0"],,,
          ac_cv_asm_func_def=".type @function",
        [WINE_TRY_ASM_LINK(["\t.globl _ac_test\n\t.type _ac_test,2\n_ac_test:\t.long 0"],,,
          ac_cv_asm_func_def=".type 2",
          ac_cv_asm_func_def="unknown")])]))
    
    AH_TEMPLATE(__ASM_FUNC,[Define to a macro to generate an assembly function directive])
    case "$ac_cv_asm_func_def" in
      ".def")
         AC_DEFINE([__ASM_FUNC(name)], [".def " __ASM_NAME(name) "; .scl 2; .type 32; .endef"]) ;;
      ".type @function")
         AC_DEFINE([__ASM_FUNC(name)], [".type " __ASM_NAME(name) ",@function"]) ;;
      ".type 2")
         AC_DEFINE([__ASM_FUNC(name)], [".type " __ASM_NAME(name) ",2"]) ;;
      *)
         AC_DEFINE([__ASM_FUNC(name)], [""]) ;;
    esac
    
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    dnl **** Check for underscore on external symbols ****
    
    
    AC_CACHE_CHECK([whether external symbols need an underscore prefix], ac_cv_c_extern_prefix,
    
        WINE_TRY_ASM_LINK([".globl _ac_test\n_ac_test:\t.long 0"],
                          [extern int ac_test;],
                          [if (ac_test) return 1],
                          ac_cv_c_extern_prefix="yes",ac_cv_c_extern_prefix="no"))
    
    AH_TEMPLATE(__ASM_NAME,[Define to a macro to generate an assembly name from a C symbol])
    
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    if test "$ac_cv_c_extern_prefix" = "yes"
    then
    
      AC_DEFINE([__ASM_NAME(name)], ["_" name])
    else
      AC_DEFINE([__ASM_NAME(name)], [name])
    
    dnl **** Check how to do strings in assembler ****
    
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    AC_CACHE_CHECK([for assembler keyword for ASCII strings], ac_cv_c_asm_string,
        WINE_TRY_ASM_LINK([".data\\n\\t.string \\"test\\"\\n\\t.text"],,,ac_cv_c_asm_string=".string",
          WINE_TRY_ASM_LINK([".data\\n\\t.asciz \\"test\\"\\n\\t.text"],,,ac_cv_c_asm_string=".asciz",
            WINE_TRY_ASM_LINK([".data\\n\\t.ascii \\"test\\"\\n\\t.text"],,,ac_cv_c_asm_string=".ascii",
              AC_MSG_ERROR([could not discover how to produce C strings with assembler.])))))
    
    AC_DEFINE_UNQUOTED(__ASM_STRING, ["$ac_cv_c_asm_string"],
                       [Define to the assembler keyword used to specify an ASCII string])
    
    
    dnl **** Check for .short in assembler ****
    
    
    AC_CACHE_CHECK([for assembler keyword for word values], ac_cv_c_asm_short,
        WINE_TRY_ASM_LINK([".data\\n\\t.short 1\\n\\t.text"],,,ac_cv_c_asm_short=".short",
          WINE_TRY_ASM_LINK([".data\\n\\t.half 1\\n\\t.text"],,,ac_cv_c_asm_short=".half",
            AC_MSG_ERROR([could not discover how to specify word values with assembler.]))))
    
    AC_DEFINE_UNQUOTED(__ASM_SHORT, ["$ac_cv_c_asm_short"],
                       [Define to the assembler keyword used to specify a word value])
    
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    dnl **** Check for working dll ****
    
    
    AC_SUBST(DLLIBS,"")
    AC_SUBST(LDSHARED,"")
    
    AC_SUBST(LIBEXT,"so")
    AC_SUBST(IMPLIBEXT,"def")
    
    case $host_os in
      cygwin*|mingw32*)
    
        AC_CHECK_TOOL(DLLTOOL,dlltool,false)
    
        AC_CHECK_TOOL(DLLWRAP,dllwrap,false)
        if test "$DLLWRAP" = "false"; then
          LIBEXT="a"
        else
    
          dnl FIXME - check whether dllwrap works correctly...
          LIBEXT="dll"
        fi
    
        ;;
      *)
        AC_CHECK_HEADERS(dlfcn.h,
            [AC_CHECK_FUNCS(dlopen,,
                [AC_CHECK_LIB(dl,dlopen,
                             [AC_DEFINE(HAVE_DLOPEN,1,[Define if you have dlopen])
                              DLLIBS="-ldl"],
                             [LIBEXT="a"])])],
            [LIBEXT="a"])
    
        if test "$LIBEXT" = "so"
        then
    
          AC_CACHE_CHECK([whether we can build a GNU style ELF dll], ac_cv_c_dll_gnuelf,
              [WINE_TRY_CFLAGS([-fPIC -shared -Wl,-soname,conftest.so.1.0,-Bsymbolic],
                               ac_cv_c_dll_gnuelf="yes",ac_cv_c_dll_gnuelf="no")])
    
          if test "$ac_cv_c_dll_gnuelf" = "yes"
          then
            LDSHARED="\$(CC) -shared \$(SONAME:%=-Wl,-soname,%)"
    
            LDDLLFLAGS="-shared -Wl,-Bsymbolic"
    
            AC_CACHE_CHECK([whether the linker accepts -z defs], ac_cv_c_dll_zdefs,
              [WINE_TRY_CFLAGS([-fPIC -shared -Wl,-Bsymbolic,-z,defs],
                               ac_cv_c_dll_zdefs="yes",ac_cv_c_dll_zdefs="no")])
            if test "$ac_cv_c_dll_zdefs" = "yes"
            then
    
              LDDLLFLAGS="$LDDLLFLAGS,-z,defs"
    
            AC_CACHE_CHECK([whether the linker accepts -init and -fini], ac_cv_c_dll_init_fini,
              [WINE_TRY_CFLAGS([-fPIC -shared -Wl,-Bsymbolic,-init,__wine_spec_init,-fini,__wine_spec_fini],
                               ac_cv_c_dll_init_fini="yes",ac_cv_c_dll_init_fini="no")])
            if test "$ac_cv_c_dll_init_fini" = "yes"
            then
    
              LDDLLFLAGS="$LDDLLFLAGS,-init,__wine_spec_init,-fini,__wine_spec_fini"
    
            AC_CACHE_CHECK([whether the linker accepts version scripts], ac_cv_c_ld_version_scripts,
              [echo '{ global: *; };' >conftest.map
               WINE_TRY_CFLAGS([-fPIC -shared -Wl,--version-script=conftest.map],
                               ac_cv_c_ld_version_scripts="yes",ac_cv_c_ld_version_scripts="no")
               rm -f conftest.map])
            if test "$ac_cv_c_ld_version_scripts" = "yes"
            then
              LDSHARED="$LDSHARED \$(VERSCRIPT:%=-Wl,--version-script=%)"
            fi
    
    
            AC_CACHE_CHECK([whether the linker accepts --export-dynamic], ac_cv_c_export_dynamic,
              [WINE_TRY_CFLAGS([-fPIC -Wl,--export-dynamic],
                               ac_cv_c_export_dynamic="yes",ac_cv_c_export_dynamic="no")])
            if test "$ac_cv_c_export_dynamic" = "yes"
            then
    
              AC_SUBST(LDEXECFLAGS,["-Wl,--export-dynamic"])
    
                AC_CACHE_CHECK([whether we can relocate the executable to 0x77f00000], ac_cv_ld_reloc_exec,
                  [WINE_TRY_CFLAGS([-Wl,--section-start,.interp=0x77f00400],
                                   ac_cv_ld_reloc_exec="yes", ac_cv_ld_reloc_exec="no")])
    
                if test "$ac_cv_ld_reloc_exec" = "yes"
                then
    
                  LDEXECFLAGS="$LDEXECFLAGS -Wl,--section-start,.interp=0x77f00400"
    
            AC_CACHE_CHECK(whether we can build a UnixWare (Solaris) dll, ac_cv_c_dll_unixware,
                [WINE_TRY_CFLAGS([-fPIC -Wl,-G,-h,conftest.so.1.0,-B,symbolic],
                                 ac_cv_c_dll_unixware="yes",ac_cv_c_dll_unixware="no")])
    
            if test "$ac_cv_c_dll_unixware" = "yes"
            then
              LDSHARED="\$(CC) -Wl,-G \$(SONAME:%=-Wl,-h,%)"
    
              LDDLLFLAGS="-Wl,-G,-B,symbolic"
    
    
            else
              AC_CACHE_CHECK(whether we can build a Mach-O (Mac OS X/Darwin) dll, ac_cv_c_dll_macho,
                [WINE_TRY_CFLAGS([-bundle], ac_cv_c_dll_macho="yes", ac_cv_c_dll_macho="no")])
              if test "$ac_cv_c_dll_macho" = "yes"
              then
                LIBEXT="dylib"
    
                LDDLLFLAGS="-bundle -flat_namespace -undefined suppress"
    
                LDSHARED="\$(CC) -dynamiclib"
                CFLAGS="$CFLAGS -ffixed-r13 -no-cpp-precomp"
    
                STRIP="$STRIP -u -r" 
    
    
        dnl Check for cross compiler to build test programs
        AC_SUBST(CROSSTEST,"")
        if test "$cross_compiling" = "no"
        then
    
          AC_CHECK_PROGS(CROSSCC,i586-mingw32msvc-gcc i386-mingw32msvc-gcc i386-mingw32-gcc mingw-gcc,false)
          AC_CHECK_PROGS(DLLTOOL,i586-mingw32msvc-dlltool i386-mingw32msvc-dlltool i386-mingw32-dlltool mingw-dlltool,false)
          AC_CHECK_PROGS(CROSSWINDRES,i586-mingw32msvc-windres i386-mingw32msvc-windres i386-mingw32-windres mingw-windres,false)
    
          if test "$CROSSCC" != "false"; then CROSSTEST="\$(CROSSTEST)"; 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.]
    )
    
    case $build_os in
      cygwin*|mingw32*)
    
        AC_SUBST(LDPATH,"PATH=\"\$(TOOLSDIR)/libs/unicode:\$\$PATH\"") ;;
    
      darwin*|macosx*)
        AC_SUBST(LDPATH,"DYLD_LIBRARY_PATH=\"\$(TOOLSDIR)/libs/unicode:\$\$DYLD_LIBRARY_PATH\"") ;;
    
        AC_SUBST(LDPATH,"LD_LIBRARY_PATH=\"\$(TOOLSDIR)/libs/unicode:\$\$LD_LIBRARY_PATH\"") ;;
    
    dnl Mingw needs explicit msvcrt for linking libwine
    case $host_os in
      mingw32*)
    
        AC_SUBST(CRTLIBS,"-lmsvcrt") ;;
    esac
    
    case $host_os in
      linux*)
    
        WINE_TRY_CFLAGS([-static],,AC_MSG_ERROR([You need to install the static version of glibc to build Wine.]))
    
        AC_SUBST(WINE_BINARIES,"wine-glibc wine-kthread wine-pthread wine-preloader")
    
        ;;
      *)
        AC_SUBST(WINE_BINARIES,"wine-kthread")
        AC_SUBST(MAIN_BINARY,"wine-kthread")
        ;;
    
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    dnl **** Get the soname for libraries that we load dynamically ****
    
    
    if test "$LIBEXT" = "so" -o "$LIBEXT" = "dylib"
    
      WINE_GET_SONAME(X11,XCreateWindow,[$X_LIBS $X_EXTRA_LIBS])
      WINE_GET_SONAME(Xext,XextCreateExtension,[$X_LIBS -lX11 $X_EXTRA_LIBS])
    
      WINE_GET_SONAME(Xi,XOpenDevice,[$X_LIBS -lXext -lX11 $X_EXTRA_LIBS])
    
      WINE_GET_SONAME(Xrender,XRenderQueryExtension,[$X_LIBS -lXext -lX11 $X_EXTRA_LIBS])
    
      WINE_GET_SONAME(Xrandr,XRRQueryExtension,[$X_LIBS -lXext -lX11 $X_EXTRA_LIBS])
    
      WINE_GET_SONAME(freetype,FT_Init_FreeType,[$X_LIBS])
    
      WINE_GET_SONAME(GL,glXQueryExtension,[$X_LIBS $X_EXTRA_LIBS])