diff --git a/academic/rbio/autotoolize.diff b/academic/rbio/patches/autotoolize.diff
similarity index 95%
rename from academic/rbio/autotoolize.diff
rename to academic/rbio/patches/autotoolize.diff
index 4da1d0c210..b20e1a88e5 100644
--- a/academic/rbio/autotoolize.diff
+++ b/academic/rbio/patches/autotoolize.diff
@@ -35,11 +35,10 @@ diff --git a/Makefile.am b/Makefile.am
 new file mode 100644
 --- /dev/null
 +++ b/Makefile.am
-@@ -0,0 +1,5 @@
+@@ -0,0 +1,4 @@
 +SUBDIRS = Include Source RBio Demo Tcov
 +EXTRA_DIST = README.txt Doc/ChangeLog Doc/License.txt Doc/gpl.txt
 +
-+pkgconfigdir = $(libdir)/pkgconfig
 +pkgconfig_DATA = rbio.pc
 diff --git a/RBio/Makefile.am b/RBio/Makefile.am
 new file mode 100644
@@ -190,23 +189,21 @@ new file mode 100644
 +# Process this file with autoconf to produce a configure script.
 +
 +AC_PREREQ([2.69])
-+AC_INIT([RBio],[2.2.1],[DrTimothyAldenDavis@gmail.com],[rbio],[http://www.suitesparse.com/])
++AC_INIT([RBio],[2.2.6],[DrTimothyAldenDavis@gmail.com],[rbio],[http://www.suitesparse.com/])
 +AC_CONFIG_SRCDIR([Source/RBio.c])
 +AC_CONFIG_HEADERS([config.h])
 +AM_INIT_AUTOMAKE([foreign])
 +LT_INIT
 +
 +# Checks for programs.
++PKG_PROG_PKG_CONFIG
 +AC_PROG_INSTALL
 +AC_PROG_CC
 +
-+LIBS_SAVED=$LIBS
++AS_VAR_SET([LIBS_SAVED], [$LIBS])
 +
 +# Checks for libraries.
-+PKG_PROG_PKG_CONFIG
-+PKG_CHECK_MODULES([SUITESPARSECONFIG],[suitesparseconfig],
-+	[],
-+	[AC_MSG_ERROR([cannot find suitesparseconfig])])
++PKG_CHECK_MODULES([SUITESPARSECONFIG], [suitesparseconfig])
 +
 +# Checks for header files.
 +AC_CHECK_HEADERS([stddef.h stdlib.h string.h])
@@ -215,8 +212,9 @@ new file mode 100644
 +
 +# Checks for library functions.
 +
-+LIBS=$LIBS_SAVED
++AS_VAR_SET([LIBS], [$LIBS_SAVED])
 +
++PKG_INSTALLDIR
 +AC_CONFIG_FILES([
 +	rbio.pc
 +	Makefile
@@ -225,7 +223,8 @@ new file mode 100644
 +	RBio/Makefile
 +	RBio/private/Makefile
 +	Source/Makefile
-+	Tcov/Makefile])
++	Tcov/Makefile
++])
 +AC_OUTPUT
 diff --git a/rbio.pc.in b/rbio.pc.in
 new file mode 100644
diff --git a/academic/rbio/rbio.SlackBuild b/academic/rbio/rbio.SlackBuild
index 0c386bf1a4..51a0110fee 100644
--- a/academic/rbio/rbio.SlackBuild
+++ b/academic/rbio/rbio.SlackBuild
@@ -25,14 +25,14 @@
 PRGNAM=rbio
 SRCNAM=SuiteSparse
 SUBDIR=RBio
-VERSION=${VERSION:-2.2.1}
-SRCVER=${SRCVER:-4.4.6}
-BUILD=${BUILD:-2}
+VERSION=${VERSION:-2.2.6}
+SRCVER=${SRCVER:-4.5.3}
+BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
   case "$(uname -m)" in
-    i?86) ARCH=i486 ;;
+    i?86) ARCH=i586 ;;
     arm*) ARCH=arm ;;
        *) ARCH=$(uname -m) ;;
   esac
@@ -48,6 +48,9 @@ DOCS="README.txt Doc/ChangeLog Doc/License.txt Doc/gpl.txt"
 if [ "$ARCH" = "i486" ]; then
   SLKCFLAGS="-O2 -march=i486 -mtune=i686"
   LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
 elif [ "$ARCH" = "i686" ]; then
   SLKCFLAGS="-O2 -march=i686 -mtune=i686"
   LIBDIRSUFFIX=""
@@ -73,10 +76,9 @@ cd $SRCNAM/$SUBDIR
 chown -R root:root .
 chmod -R u+w,go-w,a+rX-st .
 
-patch -p1 < $CWD/autotoolize.diff
+patch -p1 < $CWD/patches/autotoolize.diff
 autoreconf -vif
 
-CFLAGS="$SLKCFLAGS" \
 ./configure \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
@@ -88,7 +90,8 @@ CFLAGS="$SLKCFLAGS" \
   --enable-shared \
   --disable-static \
   --disable-dependency-tracking \
-  --build=$ARCH-slackware-linux
+  --build=$ARCH-slackware-linux \
+  CFLAGS="$SLKCFLAGS" \
 
 make
 make check
diff --git a/academic/rbio/rbio.info b/academic/rbio/rbio.info
index ddfad46151..5e3c163a6c 100644
--- a/academic/rbio/rbio.info
+++ b/academic/rbio/rbio.info
@@ -1,8 +1,8 @@
 PRGNAM="rbio"
-VERSION="2.2.1"
+VERSION="2.2.6"
 HOMEPAGE="http://faculty.cse.tamu.edu/davis/suitesparse.html"
-DOWNLOAD="http://faculty.cse.tamu.edu/davis/SuiteSparse/SuiteSparse-4.4.6.tar.gz"
-MD5SUM="131a3a5e2dee784cd946284e44ce9af2"
+DOWNLOAD="http://faculty.cse.tamu.edu/davis/SuiteSparse/SuiteSparse-4.5.3.tar.gz"
+MD5SUM="8ec57324585df3c6483ad7f556afccbd"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES="suitesparseconfig"