[mycpp] Fix build of osh_eval.cc

- Fix initialization of managed vars
- Legacy code generation with GLOBAL_LIST(...)

mycpp/cppgen_pass.py

@@ -123,8 +123,8 @@ def CTypeIsManaged(c_type):
   """Do we need to add it to StackRoots?"""
   assert c_type != 'void'
 
-  # TODO: What about function types?  I don't think we're using those?
-  return c_type not in ('int', 'double', 'bool')
+  # int, double, bool, scope_t enums, etc. are not managed
+  return c_type.endswith('*')
 
 
 def get_c_type(t, param=False, local=False):

mycpp/gc_heap.h

@@ -70,6 +70,11 @@ const int FixedSize = 7;  // Fixed size headers: consult field_mask_
 const int Scanned = 9;    // Copy AND scan for non-NULL pointers.
 }  // namespace Tag
 
+// Silly definition for passing types like GlobalList<T, N> and initializer
+// lists like {1, 2, 3} to macros
+
+#define COMMA ,
+
 namespace gc_heap {
 
 template <class T>
@@ -547,6 +552,7 @@ inline Slab<T>* NewSlab(int len) {
 
 #ifdef MYLIB_LEGACY
 #define GLOBAL_STR(name, val) Str* name = new Str(val);
+#define GLOBAL_LIST(T, N, name, array) List<T>* name = new List<T>(array);
 #endif
 
 #ifndef MYLIB_LEGACY
@@ -709,11 +715,6 @@ constexpr int maskbit(int offset) {
   // List<T>
   //
 
-  // Silly definition for passing types like GlobalList<T, N> and initializer
-  // lists like {1, 2, 3} to macros
-
-#define COMMA ,
-
 // Type that is layout-compatible with List (unit tests assert this).  Two
 // purposes:
 // - To make globals of "plain old data" at compile-time, not at startup time.