Rewrote configure --enable/with options handling:

1. There is no more need to set DEFAULT_wxUSE_XXX for all options (although
   it's still taken into account if it is set), use WX_ARG_DISABLE/WITHOUT for
   the options which are enabled by default instead (and WX_ARG_ENABLE/WITH
   for those which are disabled): this makes configure messages more
   understandable (this closes bug 1038676)
2. Added --disable-all-features option which allows to disable everything
   which can be disabled at once in order to build the absolutely minimal
   wx library
3. General cleanup 



git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47339 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

acinclude.m4

@@ -353,6 +353,10 @@ AC_DEFUN([WX_ARG_CACHE_FLUSH],
 dnl this macro checks for a three-valued command line --with argument:
 dnl   possible arguments are 'yes', 'no', 'sys', or 'builtin'
 dnl usage: WX_ARG_SYS_WITH(option, helpmessage, variable-name)
+dnl
+dnl the default value (used if the option is not specified at all) is the value
+dnl of wxUSE_ALL_FEATURES (which is "yes" by default but can be changed by
+dnl giving configure --disable-all-features option)
 AC_DEFUN([WX_ARG_SYS_WITH],
         [
           AC_MSG_CHECKING([for --with-$1])
@@ -379,7 +383,7 @@ AC_DEFUN([WX_ARG_SYS_WITH],
                           no_cache=1
                         fi
 
-                        ac_cv_use_$1='$3='$DEFAULT_$3
+                        ac_cv_use_$1='$3=${'DEFAULT_$3":-$wxUSE_ALL_FEATURES}"
                       ])
 
           eval "$ac_cv_use_$1"
@@ -423,7 +427,7 @@ AC_DEFUN([WX_ARG_WITH],
                           no_cache=1
                         fi
 
-                        ac_cv_use_$1='$3='$DEFAULT_$3
+                        ac_cv_use_$1='$3=${'DEFAULT_$3":-$wxUSE_ALL_FEATURES}"
                       ])
 
           eval "$ac_cv_use_$1"
@@ -431,22 +435,44 @@ AC_DEFUN([WX_ARG_WITH],
             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
           fi
 
-          if test "$$3" = yes; then
-            AC_MSG_RESULT(yes)
+          if test x"$withstring" = xwithout; then
+            if test $$3 = yes; then
+              result=no
+            else
+              result=yes
+            fi
           else
-            AC_MSG_RESULT(no)
+            result=$$3
           fi
+
+          AC_MSG_RESULT($result)
         ])
 
+dnl same as WX_ARG_WITH but makes it clear that the option is enabled by default
+AC_DEFUN([WX_ARG_WITHOUT], [WX_ARG_WITH($1, [$2], $3, without)])
+
 dnl like WX_ARG_WITH but uses AC_ARG_ENABLE instead of AC_ARG_WITH
-dnl usage: WX_ARG_ENABLE(option, helpmessage, variable-name, enablestring)
+dnl usage: WX_ARG_ENABLE(option, helpmessage, var, [enablestring], [default])
 dnl
-dnl enablestring is a hack and allows to show "checking for --disable-foo"
-dnl message when running configure instead of the default "checking for
-dnl --enable-foo" one whih is useful for the options enabled by default
+dnl enablestring can be omitted or a literal string "disable" and allows to
+dnl show "checking for --disable-foo" message when running configure instead of
+dnl the default "checking for --enable-foo" one whih is useful for the options
+dnl enabled by default
+dnl
+dnl the "default" argument can be omitted or contain the default value to use
+dnl for the option if it's unspecified
 AC_DEFUN([WX_ARG_ENABLE],
         [
           enablestring=$4
+          defaultval=$5
+          if test -z"$defaultval"; then
+              if test x"$enablestring" = xdisable; then
+                  defaultval=yes
+              else
+                  defaultval=no
+              fi
+          fi
+
           AC_MSG_CHECKING([for --${enablestring:-enable}-$1])
           no_cache=0
           AC_ARG_ENABLE($1, [$2],
@@ -465,7 +491,7 @@ AC_DEFUN([WX_ARG_ENABLE],
                             no_cache=1
                           fi
 
-                          ac_cv_use_$1='$3='$DEFAULT_$3
+                          ac_cv_use_$1='$3=${'DEFAULT_$3":-$defaultval}"
                         ])
 
           eval "$ac_cv_use_$1"
@@ -473,13 +499,25 @@ AC_DEFUN([WX_ARG_ENABLE],
             echo $ac_cv_use_$1 >> ${wx_arg_cache_file}.tmp
           fi
 
-          if test "$$3" = yes; then
-            AC_MSG_RESULT(yes)
+          if test x"$enablestring" = xdisable; then
+            if test $$3 = yes; then
+              result=no
+            else
+              result=yes
+            fi
           else
-            AC_MSG_RESULT(no)
+            result=$$3
           fi
+
+          AC_MSG_RESULT($result)
         ])
 
+dnl the same as WX_ARG_ENABLE but makes it more clear that the option is
+dnl enabled by default
+AC_DEFUN([WX_ARG_DISABLE], [WX_ARG_ENABLE($1, [$2], $3, disable)])
+
+dnl same as WX_ARG_ENABLE but defaults to wxUSE_ALL_FEATURES instead of "yes"
+AC_DEFUN([WX_ARG_FEATURE], [WX_ARG_ENABLE($1, [$2], $3,, $wxUSE_ALL_FEATURES)])
 
 dnl Like WX_ARG_ENABLE but accepts a parameter.
 dnl
@@ -511,7 +549,7 @@ AC_DEFUN([WX_ARG_ENABLE_PARAM],
                           else
                             no_cache=1
                           fi
-                            
+
                           wx_cv_use_$1='$3='$DEFAULT_$3
                         ])