diff --git a/tools/platform.sh b/tools/platform.sh
index f3814b0..64576fb 100755
--- a/tools/platform.sh
+++ b/tools/platform.sh
@@ -30,10 +30,9 @@ DESTDIR=
 LDSOCONF="/etc/ld.so.conf"
 PREFIX="/usr/local"
 PROGNAME="platform.sh"
-SOEXT=
+SOEXT=".so"
 #executables
 UNAME="uname"
-
 [ -f "$CONFIGSH" ] && . "$CONFIGSH"
 
 
@@ -99,25 +98,14 @@ _library_ldsoconf()
 _platform_variable()
 {
 	variable="$1"
+	context="$2"
 
 	case "$variable" in
 		ARCH)
-			if [ -n "$ARCH" ]; then
-				echo "$ARCH"
-				return 0
-			fi
-			ARCH=$($UNAME -m)
-			case "$ARCH" in
-				amd64|x86_64)
-					echo "amd64"
-					;;
-				i[3456]86)
-					echo "i386"
-					;;
-				*)
-					echo "unknown"
-					;;
-			esac
+			[ -n "$ARCH" ] || ARCH="$context"
+			[ -n "$ARCH" ] || ARCH=$($UNAME -m)
+			[ -n "$ARCH" ] || return 2
+			echo "$ARCH"
 			;;
 		BINDIR)
 			echo "$PREFIX/bin"
@@ -125,6 +113,14 @@ _platform_variable()
 		DATADIR)
 			echo "$PREFIX/share"
 			;;
+		LIBK_*|LIBULOADER_*|NATIVE_*|UKERNEL_*|ULOADER_*)
+			[ -n "$PORT" ] || PORT=$(_platform_variable "PORT" "$context")
+			case "$PORT" in
+				amd64|i386)
+					"_platform_variable_$PORT" "$variable"
+					;;
+			esac
+			;;
 		LIBDIR)
 			echo "$PREFIX/lib"
 			;;
@@ -135,25 +131,30 @@ _platform_variable()
 				echo "$PREFIX/share/man"
 			fi
 			;;
+		PORT)
+			[ -n "$PORT" ] || PORT="$context"
+			if [ ! -n "$PORT" ]; then
+				[ -n "$ARCH" ] || ARCH=$(_platform_variable "ARCH")
+				case "$ARCH" in
+					amd64|x86_64)
+						PORT="amd64"
+						;;
+					i[3456]86)
+						PORT="i386"
+						;;
+					*)
+						return 2
+						;;
+				esac
+			fi
+			echo "$PORT"
+			;;
 		PREFIX)
 			echo "$PREFIX"
 			;;
 		SBINDIR)
 			echo "$PREFIX/sbin"
 			;;
-		SOEXT)
-			case "$($UNAME -s)" in
-				"Darwin")
-					echo ".dylib"
-					;;
-				"MINGW"*)
-					echo ".dll"
-					;;
-				*)
-					echo ".so"
-					;;
-			esac
-			;;
 		SYSCONFDIR)
 			if [ "$PREFIX" = "/usr" ]; then
 				echo "/etc"
@@ -164,21 +165,103 @@ _platform_variable()
 	esac
 }
 
+_platform_variable_amd64()
+{
+	variable="$1"
+	extra=
+	platform=$($UNAME -s)
+
+	if [ "$platform" = "OpenBSD" ]; then
+		extra=" -fno-stack-protector"
+	else
+		extra=" -fstack-protector"
+	fi
+	case "$variable" in
+		LIBK_CFLAGS)
+			echo "-ffreestanding -fPIC -mno-red-zone$extra"
+			;;
+		LIBK_LDFLAGS|NATIVE_LDFLAGS)
+			echo "-nostdlib"
+			;;
+		LIBULOADER_CFLAGS)
+			echo "-m32 -ffreestanding -fPIC -mno-red-zone$extra"
+			;;
+		LIBULOADER_LDFLAGS)
+			echo "-m32 -nostdlib"
+			;;
+		NATIVE_CFLAGS)
+			echo "-ffreestanding -fPIE$extra"
+			;;
+		UKERNEL_CFLAGS)
+			echo "-ffreestanding -fPIE -mno-red-zone$extra"
+			;;
+		UKERNEL_LDFLAGS)
+			echo "-nostdlib -pie -static -T ${prepend}src/arch/amd64/uKernel.ld"
+			;;
+		ULOADER_CFLAGS)
+			echo "-m32 -ffreestanding$extra"
+			;;
+		ULOADER_LDFLAGS)
+			[ -n "$CC" ] || CC="cc"
+			echo "-m32 -nostdlib -static -T ${prepend}src/arch/i386/uKernel.ld $($CC -m32 -print-libgcc-file-name)"
+			;;
+	esac
+}
+
+_platform_variable_i386()
+{
+	variable="$1"
+	extra=
+	platform=$($UNAME -s)
+
+	if [ "$platform" = "OpenBSD" ]; then
+		extra=" -fno-stack-protector"
+	else
+		extra=" -fstack-protector"
+	fi
+	case "$variable" in
+		LIBK_CFLAGS|LIBULOADER_CFLAGS)
+			echo "-ffreestanding -fPIC$extra"
+			;;
+		LIBK_LDFLAGS|LIBULOADER_LDFLAGS|NATIVE_LDFLAGS)
+			echo "-nostdlib"
+			;;
+		NATIVE_CFLAGS|UKERNEL_CFLAGS)
+			echo "-ffreestanding -fPIE$extra"
+			;;
+		UKERNEL_LDFLAGS)
+			echo "-nostdlib -pie -static -T ${prepend}src/arch/i386/uKernel.ld"
+			;;
+		ULOADER_CFLAGS)
+			echo "-ffreestanding$extra"
+			;;
+		ULOADER_LDFLAGS)
+			[ -n "$CC" ] || CC="cc"
+			echo "-nostdlib -static -T ${prepend}src/arch/i386/uKernel.ld $($CC -m32 -print-libgcc-file-name)"
+			;;
+	esac
+}
+
 
 #usage
 _usage()
 {
 	echo "Usage: $PROGNAME -l library" 1>&2
-	echo "       $PROGNAME -V variable" 1>&2
+	echo "       $PROGNAME -V variable [-C context]" 1>&2
 	return 1
 }
 
 
 #main
+prepend="${0%tools/platform.sh}"
+context=
 type=
 variable=
-while getopts "l:O:V:" name; do
+while getopts "C:l:O:V:" name; do
 	case "$name" in
+		C)
+			context="$OPTARG"
+			;;
 		O)
 			export "${OPTARG%%=*}"="${OPTARG#*=}"
 			;;
@@ -202,14 +285,12 @@ if [ $# -ne 0 ]; then
 	exit $?
 fi
 
-[ -n "$SOEXT" ] || SOEXT=$(_platform_variable SOEXT)
-
 case "$type" in
 	library)
 		"_platform_$type" "$library"
 		;;
 	variable)
-		"_platform_$type" "$variable"
+		"_platform_$type" "$variable" "$context"
 		;;
 	*)
 		_usage