Convert checks for PC98 support from platform #ifdefs to configure flag

Default remains the same - on for most OS'es on i386 (except Solaris),
off for everyone else.   Can be manually toggled via --enable-pc98 or
--disable-pc98.

Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

configure.ac

@@ -577,6 +577,9 @@ AC_ARG_ENABLE(null-root-cursor, AS_HELP_STRING([--enable-null-root-cursor], [Use
 AC_ARG_ENABLE(visibility,     AC_HELP_STRING([--enable-visibility], [Enable symbol visibility (default: auto)]),
 				[SYMBOL_VISIBILITY=$enableval],
 				[SYMBOL_VISIBILITY=auto])
+AC_ARG_ENABLE(pc98,     	AC_HELP_STRING([--enable-pc98], [Enable PC98 support in Xorg (default: auto)]),
+				[SUPPORT_PC98=$enableval],
+				[SUPPORT_PC98=auto])
 
 dnl GLX build options
 AC_ARG_WITH(dri-driver-path,  AS_HELP_STRING([--with-dri-driver-path=PATH], [Path to DRI drivers (default: ${libdir}/dri)]),
@@ -1652,6 +1655,9 @@ if test "x$XORG" = xyes; then
 			XORG_CFLAGS="${XORG_CFLAGS} "'$(SOLARIS_ASM_CFLAGS)'
 		fi
 		AC_SUBST([SOLARIS_ASM_CFLAGS])
+		if test "x$SUPPORT_PC98" = xauto; then
+			SUPPORT_PC98="no"
+		fi
 		;;
 	  gnu*)
 	  	XORG_OS="gnu"
@@ -1673,8 +1679,19 @@ if test "x$XORG" = xyes; then
 	  sparc*)
 		xorg_bus_sparc="yes"
 		;;
+	  i*86)
+		if test "x$SUPPORT_PC98" = xauto; then
+			SUPPORT_PC98="yes"
+		fi
+		;;
 	esac
 
+	if test "x$SUPPORT_PC98" = xauto; then
+		SUPPORT_PC98="no"
+	fi
+	if test "x$SUPPORT_PC98" = xyes; then
+		AC_DEFINE(SUPPORT_PC98, 1, [Support PC98])
+	fi
 	if test "x$XORG_OS_PCI" = x ; then
 		XORG_OS_PCI=$XORG_OS
 	fi

hw/xfree86/common/xf86Config.c

@@ -71,13 +71,6 @@ extern DeviceAssocRec mouse_assoc;
 #include "picture.h"
 #endif
 
-#if (defined(__i386__)) && \
-    (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-     defined(__NetBSD__) || defined(linux) || \
-     (defined(SVR4) && !defined(sun)) || defined(__GNU__))
-#define SUPPORT_PC98
-#endif
-
 /*
  * These paths define the way the config file search is done.  The escape
  * sequences are documented in parser/scan.c.
@@ -778,11 +771,10 @@ static OptionInfoRec FlagOptions[] = {
 	{0}, FALSE },
 };
 
-#ifdef __i386__
+#ifdef SUPPORT_PC98
 static Bool
 detectPC98(void)
 {
-#ifdef SUPPORT_PC98
     unsigned char buf[2];
 
     if (xf86ReadBIOS(0xf8000, 0xe80, buf, 2) != 2)
@@ -791,11 +783,8 @@ detectPC98(void)
 	return TRUE;
     else
 	return FALSE;
-#else
-    return FALSE;
-#endif
 }
-#endif /* __i386__ */
+#endif
 
 static Bool
 configServerFlags(XF86ConfFlagsPtr flagsconf, XF86OptionPtr layoutopts)
@@ -1054,7 +1043,7 @@ configServerFlags(XF86ConfFlagsPtr flagsconf, XF86OptionPtr layoutopts)
 	xf86Info.pixmap24 = Pix24DontCare;
 	xf86Info.pix24From = X_DEFAULT;
     }
-#ifdef __i386__
+#ifdef SUPPORT_PC98
     if (xf86GetOptValBool(FlagOptions, FLAG_PC98, &value)) {
 	xf86Info.pc98 = value;
 	if (value) {

hw/xfree86/common/xf86Globals.c

@@ -124,7 +124,7 @@ xf86InfoRec xf86Info = {
     .miscModInDevAllowNonLocal  = FALSE,
     .pixmap24                   = Pix24DontCare,
     .pix24From                  = X_DEFAULT,
-#ifdef __i386__
+#ifdef SUPPORT_PC98
     .pc98                       = FALSE,
 #endif
     .pmFlag                     = TRUE,

hw/xfree86/common/xf86Helper.c

@@ -2140,7 +2140,7 @@ xf86GetAllowMouseOpenFail(void)
 Bool
 xf86IsPc98(void)
 {
-#ifdef __i386__
+#if SUPPORT_PC98
     return xf86Info.pc98;
 #else
     return FALSE;

hw/xfree86/common/xf86Privstr.h

@@ -91,7 +91,7 @@ typedef struct {
 						   input device events */
     Pix24Flags		pixmap24;
     MessageType		pix24From;
-#ifdef __i386__
+#ifdef SUPPORT_PC98
     Bool		pc98;
 #endif
     Bool		pmFlag;

include/xorg-config.h.in

@@ -133,4 +133,7 @@
 /* Use SIGIO handlers for input device events by default */
 #undef USE_SIGIO_BY_DEFAULT
 
+/* Support PC98 */
+#undef SUPPORT_PC98
+
 #endif /* _XORG_CONFIG_H_ */