From f06d0839bdaff783d8902bcedb572cbaabb6447a Mon Sep 17 00:00:00 2001
From: Tom Collins <tom.collins@digi.com>
Date: Thu, 12 Jan 2017 16:08:51 -0800
Subject: [PATCH] py/modsys: update conditionals for code referencing
 sys.stdout

Working on a build with PY_IO enabled (for PY_UJSON support) but PY_SYS_STDFILES disabled (no filesystem).  There are multiple references to mp_sys_stdout_obj that should only be enabled if both PY_IO and PY_SYS_STDFILES are enabled.
---
 py/modbuiltins.c | 8 ++++----
 py/modsys.c      | 4 ++--
 py/mpprint.h     | 4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/py/modbuiltins.c b/py/modbuiltins.c
index e8119456d..17bd30c52 100644
--- a/py/modbuiltins.c
+++ b/py/modbuiltins.c
@@ -406,7 +406,7 @@ STATIC mp_obj_t mp_builtin_print(size_t n_args, const mp_obj_t *args, mp_map_t *
     if (end_elem != NULL && end_elem->value != mp_const_none) {
         end_data = mp_obj_str_get_data(end_elem->value, &end_len);
     }
-    #if MICROPY_PY_IO
+    #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
     void *stream_obj = &mp_sys_stdout_obj;
     mp_map_elem_t *file_elem = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(MP_QSTR_file), MP_MAP_LOOKUP);
     if (file_elem != NULL && file_elem->value != mp_const_none) {
@@ -417,19 +417,19 @@ STATIC mp_obj_t mp_builtin_print(size_t n_args, const mp_obj_t *args, mp_map_t *
     #endif
     for (mp_uint_t i = 0; i < n_args; i++) {
         if (i > 0) {
-            #if MICROPY_PY_IO
+            #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
             mp_stream_write_adaptor(stream_obj, sep_data, sep_len);
             #else
             mp_print_strn(&mp_plat_print, sep_data, sep_len, 0, 0, 0);
             #endif
         }
-        #if MICROPY_PY_IO
+        #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
         mp_obj_print_helper(&print, args[i], PRINT_STR);
         #else
         mp_obj_print_helper(&mp_plat_print, args[i], PRINT_STR);
         #endif
     }
-    #if MICROPY_PY_IO
+    #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
     mp_stream_write_adaptor(stream_obj, end_data, end_len);
     #else
     mp_print_strn(&mp_plat_print, end_data, end_len, 0, 0, 0);
diff --git a/py/modsys.c b/py/modsys.c
index b208c88bd..5fbcb944c 100644
--- a/py/modsys.c
+++ b/py/modsys.c
@@ -45,7 +45,7 @@ extern struct _mp_dummy_t mp_sys_stdin_obj;
 extern struct _mp_dummy_t mp_sys_stdout_obj;
 extern struct _mp_dummy_t mp_sys_stderr_obj;
 
-#if MICROPY_PY_IO
+#if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
 const mp_print_t mp_sys_stdout_print = {&mp_sys_stdout_obj, mp_stream_write_adaptor};
 #endif
 
@@ -106,7 +106,7 @@ STATIC mp_obj_t mp_sys_exit(size_t n_args, const mp_obj_t *args) {
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_sys_exit_obj, 0, 1, mp_sys_exit);
 
 STATIC mp_obj_t mp_sys_print_exception(size_t n_args, const mp_obj_t *args) {
-    #if MICROPY_PY_IO
+    #if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
     void *stream_obj = &mp_sys_stdout_obj;
     if (n_args > 1) {
         stream_obj = MP_OBJ_TO_PTR(args[1]); // XXX may fail
diff --git a/py/mpprint.h b/py/mpprint.h
index f9204e322..4fc904a20 100644
--- a/py/mpprint.h
+++ b/py/mpprint.h
@@ -39,7 +39,7 @@
 #define PF_FLAG_ADD_PERCENT       (0x100)
 #define PF_FLAG_SHOW_OCTAL_LETTER (0x200)
 
-#if MICROPY_PY_IO
+#if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
 #    define MP_PYTHON_PRINTER &mp_sys_stdout_print
 #else
 #    define MP_PYTHON_PRINTER &mp_plat_print
@@ -55,7 +55,7 @@ typedef struct _mp_print_t {
 // All (non-debug) prints go through one of the two interfaces below.
 // 1) Wrapper for platform print function, which wraps MP_PLAT_PRINT_STRN.
 extern const mp_print_t mp_plat_print;
-#if MICROPY_PY_IO
+#if MICROPY_PY_IO && MICROPY_PY_SYS_STDFILES
 // 2) Wrapper for printing to sys.stdout.
 extern const mp_print_t mp_sys_stdout_print;
 #endif