From fb4802a0bb905aea1eb1e8f1ad62474faf0f2789 Mon Sep 17 00:00:00 2001
From: Sjoerd van der Berg <harekiet@users.sourceforge.net>
Date: Thu, 24 Mar 2005 08:46:38 +0000
Subject: [PATCH] Add a test/option to enable unaliged memory access for
 certain processors

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2130
---
 configure.in | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/configure.in b/configure.in
index ae00c5ac..13ecf042 100644
--- a/configure.in
+++ b/configure.in
@@ -101,16 +101,31 @@ dnl The target cpu checks for dynamic cores
 AH_TEMPLATE(C_HOSTCPU,[The type of cpu this host has])
 AC_MSG_CHECKING(for target cpu type) 
 case "$target_cpu" in
-  i386|i486|i586|i686)
+  i?86)
     AC_DEFINE(C_HOSTCPU,X86)
     AC_MSG_RESULT(x86 compatible)
     c_hostcpu="x86"
+    c_unalignedmemory=yes
     ;;
-  *)
+   powerpc*)
+    AC_DEFINE(C_HOSTCPU,POWERPC)
+    AC_MSG_RESULT(Power PC)
+    c_hostcpu="powerpc"
+    c_unalignedmemory=yes
+    ;;
+   m68k*)
+    AC_DEFINE(C_HOSTCPU,M68K)
+    AC_MSG_RESULT(Motorola 68000)
+    c_hostcpu="m68k"
+    c_unalignedmemory=yes
+    ;;
+   *)
     AC_DEFINE(C_HOSTCPU,UNKOWN)
     AC_MSG_RESULT(unknown)
+    c_unalignedmemory=no
     ;;
 esac
+
 AH_TEMPLATE(C_DYNAMIC_X86,[Define to 1 to use x86 dynamic cpu core])
 AC_ARG_ENABLE(dynamic-x86,AC_HELP_STRING([--disable-dynamic-x86],[Disable x86 dynamic cpu core]),,enable_dynamic_x86=yes)
 AC_MSG_CHECKING(whether x86 dynamic cpu core will be enabled) 
@@ -125,8 +140,6 @@ else
   fi
 fi
 
-
-
 AH_TEMPLATE(C_FPU,[Define to 1 to enable floating point emulation])
 AC_ARG_ENABLE(fpu,AC_HELP_STRING([--disable-fpu],[Disable fpu support]),,enable_fpu=yes)
 AC_MSG_CHECKING(whether fpu emulation will be enabled) 
@@ -155,6 +168,16 @@ else
   fi
 fi
 
+AH_TEMPLATE(C_UNALIGNED_MEMORY,[Define to 1 to use a unaligned memory access])
+AC_ARG_ENABLE(unaligned_memory,AC_HELP_STRING([--disable-unaligned-memory],[Disable unaligned memory access]),,enable_unaligned_memory=yes)
+AC_MSG_CHECKING(whether to enable unaligned memory access) 
+if test x$enable_unaligned_memory = xyes -a x$c_unalignedmemory = xyes; then 
+  AC_DEFINE(C_UNALIGNED_MEMORY,1)
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_RESULT(no)
+fi
+
 AH_TEMPLATE(C_SSHOT,[Define to 1 to enable screenshots, requires libpng])
 AC_CHECK_HEADER(png.h,have_png_h=yes,)
 AC_CHECK_LIB(png, png_check_sig, have_png_lib=yes, ,-lz)