libraries/opencv: Miscellaneous cleanups and patches.

Clean up builds and add patches for gcc4.4 and libpng14

libraries/opencv/opencv-gcc4.4.patch

@@ -0,0 +1,12 @@
+diff -U 3 -H -d -r -N -- opencv-1.1.0.old/cxcore/include/cxmisc.h opencv-1.1.0/cxcore/include/cxmisc.h
+--- opencv-1.1.0.old/cxcore/include/cxmisc.h	2008-07-29 15:05:04.000000000 -0400
++++ opencv-1.1.0/cxcore/include/cxmisc.h	2010-05-23 17:23:44.000000000 -0400
+@@ -130,7 +130,7 @@
+     #include <alloca.h>
+ #elif defined HAVE_ALLOCA
+     #include <stdlib.h>
+-#elif
++#else
+     #error
+ #endif
+ 

libraries/opencv/opencv-libpng14.patch

@@ -0,0 +1,12 @@
+diff -U 3 -H -d -r -N -- opencv-1.1.0.old/otherlibs/highgui/grfmt_png.cpp opencv-1.1.0/otherlibs/highgui/grfmt_png.cpp
+--- opencv-1.1.0.old/otherlibs/highgui/grfmt_png.cpp	2006-10-11 12:51:43.000000000 -0400
++++ opencv-1.1.0/otherlibs/highgui/grfmt_png.cpp	2010-05-23 17:46:19.232028822 -0400
+@@ -215,7 +215,7 @@
+                 png_set_palette_to_rgb( png_ptr );
+ 
+             if( m_color_type == PNG_COLOR_TYPE_GRAY && m_bit_depth < 8 )
+-                png_set_gray_1_2_4_to_8( png_ptr );
++                png_set_expand_gray_1_2_4_to_8( png_ptr );
+ 
+             if( m_iscolor && color )
+                 png_set_bgr( png_ptr ); // convert RGB to BGR

libraries/opencv/opencv.SlackBuild

@@ -24,10 +24,19 @@
 
 PRGNAM=opencv
 VERSION=1.1pre1
-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
@@ -42,6 +51,9 @@ elif [ "$ARCH" = "i686" ]; then
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
   LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
 fi
 
 rm -rf $PKG
@@ -54,6 +66,10 @@ cd $PRGNAM-$VERSION || exit 1
 chown -R root:root .
 chmod -R u+w,go+r-w,a-s .
 
+# Patch to build with libpng14 and gcc4.4.
+patch -p1 < $CWD/opencv-gcc4.4.patch
+patch -p1 < $CWD/opencv-libpng14.patch
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \