Mainly unit tests. 39/45 currently pass; the failures are all in bignum arithmetic and in deallocation.

unit-tests/progn.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+result=0
+
 expected='5'
 actual=`echo "(progn (add 2 3))" | target/psse | tail -1`
 
@@ -8,7 +10,7 @@ then
     echo "OK"
 else
     echo "Fail: expected '${expected}', got '${actual}'"
-    exit 1
+    result=1
 fi
 
 expected='"foo"'
@@ -17,8 +19,9 @@ actual=`echo "(progn (add 2.5 3) \"foo\")" | target/psse | tail -1`
 if [ "${expected}" = "${actual}" ]
 then
     echo "OK"
-    exit 0
 else
     echo "Fail: expected '${expected}', got '${actual}'"
-    exit 1
+    result=1
 fi
+
+exit ${result}