py: Add MICROPY_PY_BUILTINS_FILTER, disable for minimal ports.

Saves 320 bytes on x86.

minimal/mpconfigport.h

@@ -24,6 +24,7 @@
 #define MICROPY_PY_BUILTINS_BYTEARRAY (0)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
 #define MICROPY_PY_BUILTINS_ENUMERATE (0)
+#define MICROPY_PY_BUILTINS_FILTER  (0)
 #define MICROPY_PY_BUILTINS_FROZENSET (0)
 #define MICROPY_PY_BUILTINS_REVERSED (0)
 #define MICROPY_PY_BUILTINS_SET     (0)

py/modbuiltins.c

@@ -563,7 +563,9 @@ STATIC const mp_map_elem_t mp_module_builtins_globals_table[] = {
     #if MICROPY_PY_BUILTINS_ENUMERATE
     { MP_OBJ_NEW_QSTR(MP_QSTR_enumerate), (mp_obj_t)&mp_type_enumerate },
     #endif
+    #if MICROPY_PY_BUILTINS_FILTER
     { MP_OBJ_NEW_QSTR(MP_QSTR_filter), (mp_obj_t)&mp_type_filter },
+    #endif
 #if MICROPY_PY_BUILTINS_FLOAT
     { MP_OBJ_NEW_QSTR(MP_QSTR_float), (mp_obj_t)&mp_type_float },
 #endif

py/mpconfig.h

@@ -500,6 +500,11 @@ typedef double mp_float_t;
 #define MICROPY_PY_BUILTINS_EXECFILE (0)
 #endif
 
+// Whether to support filter function(type)
+#ifndef MICROPY_PY_BUILTINS_FILTER
+#define MICROPY_PY_BUILTINS_FILTER (1)
+#endif
+
 // Whether to support reversed function(type)
 #ifndef MICROPY_PY_BUILTINS_REVERSED
 #define MICROPY_PY_BUILTINS_REVERSED (1)

py/objfilter.c

@@ -26,6 +26,8 @@
 
 #include "py/runtime.h"
 
+#if MICROPY_PY_BUILTINS_FILTER
+
 typedef struct _mp_obj_filter_t {
     mp_obj_base_t base;
     mp_obj_t fun;
@@ -66,3 +68,5 @@ const mp_obj_type_t mp_type_filter = {
     .getiter = mp_identity,
     .iternext = filter_iternext,
 };
+
+#endif // MICROPY_PY_BUILTINS_FILTER

py/qstrdefs.h

@@ -205,7 +205,9 @@ Q(exec)
 #if MICROPY_PY_BUILTINS_EXECFILE
 Q(execfile)
 #endif
+#if MICROPY_PY_BUILTINS_FILTER
 Q(filter)
+#endif
 #if MICROPY_PY_BUILTINS_FLOAT
 Q(float)
 #endif

unix/mpconfigport_minimal.h

@@ -50,6 +50,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (0)
 #define MICROPY_PY_BUILTINS_COMPILE (0)
 #define MICROPY_PY_BUILTINS_ENUMERATE (0)
+#define MICROPY_PY_BUILTINS_FILTER  (0)
 #define MICROPY_PY_BUILTINS_FROZENSET (0)
 #define MICROPY_PY_BUILTINS_REVERSED (0)
 #define MICROPY_PY_BUILTINS_SET     (0)