Allow ports to define statically builtin functions.

Convert unix open() to such.

2 files changed, 7 insertions, 0 deletions

diff --git a/py/mpconfig.h b/py/mpconfig.h
index 1eb2acf53..6ff069291 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -107,6 +107,10 @@ typedef long long mp_longint_impl_t;
 #define MICROPY_PATH_MAX (512)
 #endif
 
+// Additional builtin function definitions - see runtime.c:builtin_table for format.
+#ifndef MICROPY_EXTRA_BUILTINS
+#define MICROPY_EXTRA_BUILTINS
+#endif
 /*****************************************************************************/
 /* Miscellaneous settings                                                    */
 
diff --git a/py/runtime.c b/py/runtime.c
index f12b3e612..01a015340 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -144,6 +144,9 @@ STATIC const mp_builtin_elem_t builtin_table[] = {
     { MP_QSTR_str, (mp_obj_t)&mp_builtin_str_obj },
     { MP_QSTR_bytearray, (mp_obj_t)&mp_builtin_bytearray_obj },
 
+    // Extra builtins as defined by a port
+    MICROPY_EXTRA_BUILTINS
+
     { MP_QSTR_, MP_OBJ_NULL }, // end of list sentinel
 };