diff --git a/buildrump.sh b/buildrump.sh
index f600b6a..f6bb302 100755
--- a/buildrump.sh
+++ b/buildrump.sh
@@ -570,6 +570,16 @@ evaltools ()
 		: ${NM:=nm}
 		: ${OBJCOPY:=objcopy}
 	else
+		if [ "${MACH_ARCH}" = 'x86_64' ] ; then
+			cc_target=genode-x86
+		elif [ "${MACH_ARCH}" = 'arm' ] ; then
+			cc_target=genode-arm
+		else
+			die Unsupported architectur ${MACH_ARCH}
+		fi
+
+		echo "MACH_ARCH cc ${MACH_ARCH}"
+
 		: ${AR:=${cc_target}-ar}
 		: ${NM:=${cc_target}-nm}
 		: ${OBJCOPY:=${cc_target}-objcopy}
@@ -600,6 +610,8 @@ evaltools ()
 		;;
 	esac
 
+	TARGET=freebsd
+
 	# check if we're running from a tarball, i.e. is checkout possible
 	BRDIR=$(dirname $0)
 	unset TARBALLMODE
@@ -872,26 +884,6 @@ evaltarget ()
 		ccdefault=32
 	fi
 
-	# step 2: if the user specified 32/64, try to establish if it will work
-	if ${THIRTYTWO} && [ "${ccdefault}" -ne 32 ] ; then
-		echo 'int main() {return 0;}' | ${CC} ${EXTRA_CFLAGS} -o /dev/null -x c - \
-		    ${EXTRA_RUMPUSER} ${EXTRA_RUMPCOMMON} > /dev/null 2>&1
-		[ $? -eq 0 ] || ${ANYTARGETISGOOD} || \
-		    die 'Gave -32, but probe shows it will not work.  Try -H?'
-	elif ${SIXTYFOUR} && [ "${ccdefault}" -ne 64 ] ; then
-		echo 'int main() {return 0;}' | ${CC} ${EXTRA_CFLAGS} -o /dev/null -x c - \
-		    ${EXTRA_RUMPUSER} ${EXTRA_RUMPCOMMON} > /dev/null 2>&1
-		[ $? -eq 0 ] || ${ANYTARGETISGOOD} || \
-		    die 'Gave -64, but probe shows it will not work.  Try -H?'
-	else
-		# not specified.  use compiler default
-		if [ "${ccdefault}" -eq 64 ]; then
-			SIXTYFOUR=true
-		else
-			THIRTYTWO=true
-		fi
-	fi
-
 	TOOLABI=''
 	case ${MACH_ARCH} in
 	"amd64"|"x86_64")
@@ -918,6 +910,8 @@ evaltarget ()
 		MACHINE="evbarm"
 		MACH_ARCH="arm"
 		TOOLABI="elf"
+		EXTRA_CFLAGS='-march=armv7-a'
+		EXTRA_AFLAGS='-march=armv7-a'
 		probearm
 		;;
 	"sparc")