diff --git a/games/wesnoth/wesnoth-libpng-1.4.0.patch b/games/wesnoth/wesnoth-libpng-1.4.0.patch
new file mode 100644
index 0000000000..be8adfcaac
--- /dev/null
+++ b/games/wesnoth/wesnoth-libpng-1.4.0.patch
@@ -0,0 +1,14 @@
+diff -Nur wesnoth-1.8.orig/src/tools/exploder_utils.cpp wesnoth-1.8/src/tools/exploder_utils.cpp
+--- wesnoth-1.8.orig/src/tools/exploder_utils.cpp	2010-01-01 15:16:49.000000000 +0200
++++ wesnoth-1.8/src/tools/exploder_utils.cpp	2010-04-08 17:38:03.066201123 +0300
+@@ -174,8 +174,8 @@
+ 	//TODO: review whether providing NULL error handlers is something
+ 	//sensible
+ 	png_struct* png_ptr = png_create_write_struct
+-		(PNG_LIBPNG_VER_STRING, reinterpret_cast<png_voidp>(png_voidp_NULL),
+-		 png_error_ptr_NULL, png_error_ptr_NULL);
++		(PNG_LIBPNG_VER_STRING, reinterpret_cast<png_voidp>(NULL),
++		 NULL, NULL);
+ 	if(!png_ptr)
+ 		throw exploder_failure("Unable to initialize the png write structure");
+ 
diff --git a/games/wesnoth/wesnoth.SlackBuild b/games/wesnoth/wesnoth.SlackBuild
index 1649e33b85..ed88088c72 100644
--- a/games/wesnoth/wesnoth.SlackBuild
+++ b/games/wesnoth/wesnoth.SlackBuild
@@ -26,10 +26,19 @@
 
 PRGNAM=wesnoth
 VERSION=${VERSION:-1.8}
-ARCH=${ARCH:-i486}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) export ARCH=i486 ;;
+    arm*) export ARCH=arm ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+       *) export ARCH=$( uname -m ) ;;
+  esac
+fi
+
 CWD=$(pwd)
 TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
@@ -46,6 +55,9 @@ elif [ "$ARCH" = "i686" ]; then
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
   LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
 fi
 
 if [ "$SERVER" = "yes" ]; then
@@ -68,6 +80,7 @@ rm -rf $TMP/$PRGNAM-$VERSION
 cd $TMP
 tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
 cd $PRGNAM-$VERSION
+patch -p1 < $CWD/wesnoth-libpng-1.4.0.patch
 chown -R root:root .
 find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
@@ -103,10 +116,9 @@ CXXFLAGS="$SLKCFLAGS" \
 make
 make install-strip DESTDIR=$PKG
 
-( cd $PKG/usr/man
-  find . -type f -exec gzip -9 {} \;
-  for i in $(find . -type l) ; do ln -s $(readlink $i).gz $i.gz ; rm $i ; done
-)
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz
+  $i.gz ; rm $i ; done
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a ABOUT-NLS COPYING INSTALL README changelog copyright \