m4=`which m4`
+# Check if the given program is installed. Returns 0 if it exists, 1
+# otherwise; so it can be used in if.
+installed() {
+ which $1 > /dev/null
+}
+
# Creates a symbolic link for file $1 in dirname of $2 with name of basenmae
# $2.
#
# Process $1.m4 with m4 using the given options.
echo "m4(): generating '$file' from '$file.m4' with options '$*'"
$m4 $* $file.m4 >> $file
+
+ unset file
}