From ea2fcdd338b9a9a545c119a7d86de1b8caf77314 Mon Sep 17 00:00:00 2001
From: Wolf Vollprecht <w.vollprecht@gmail.com>
Date: Sun, 10 Feb 2019 16:29:25 +0100
Subject: [PATCH] javascript: Fix Emscripten async load, and to compile with
 modern clang.

---
 ports/javascript/Makefile    | 10 +++--
 ports/javascript/mphalport.c |  2 +-
 ports/javascript/mphalport.h |  2 +-
 ports/javascript/wrapper.js  | 85 +++++++++++++++++++-----------------
 4 files changed, 55 insertions(+), 44 deletions(-)

diff --git a/ports/javascript/Makefile b/ports/javascript/Makefile
index 3ce698f10..9b0f4d89c 100644
--- a/ports/javascript/Makefile
+++ b/ports/javascript/Makefile
@@ -14,7 +14,12 @@ INC += -I$(TOP)
 INC += -I$(BUILD)
 
 CPP = clang -E
-CFLAGS = -m32 $(INC) -Wall -Werror -std=c99 $(COPT)
+
+ifdef EMSCRIPTEN
+    CPP += -isystem $(EMSCRIPTEN)/system/include/libc -cxx-isystem $(EMSCRIPTEN)/system/include/libcxx
+endif
+
+CFLAGS = -m32 -Wall -Werror $(INC) -std=c99 $(COPT)
 LDFLAGS = -m32 -Wl,-Map=$@.map,--cref -Wl,--gc-sections
 
 CFLAGS += -O0 -DNDEBUG
@@ -46,8 +51,7 @@ all: $(BUILD)/micropython.js
 $(BUILD)/micropython.js: $(OBJ) library.js wrapper.js
 	$(ECHO) "LINK $(BUILD)/firmware.js"
 	$(Q)emcc $(LDFLAGS) -o $(BUILD)/firmware.js $(OBJ) $(JSFLAGS)
-	cat $(BUILD)/firmware.js > $@
-	cat wrapper.js >> $@
+	cat wrapper.js $(BUILD)/firmware.js > $@
 
 min: $(BUILD)/micropython.js
 	uglifyjs $< -c -o $(BUILD)/micropython.min.js
diff --git a/ports/javascript/mphalport.c b/ports/javascript/mphalport.c
index 18e3e2ade..c938a6392 100644
--- a/ports/javascript/mphalport.c
+++ b/ports/javascript/mphalport.c
@@ -27,7 +27,7 @@
 #include "library.h"
 #include "mphalport.h"
 
-void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
+void mp_hal_stdout_tx_strn(const char *str, size_t len) {
     mp_js_write(str, len);
 }
 
diff --git a/ports/javascript/mphalport.h b/ports/javascript/mphalport.h
index 8ba66fcc9..614ce8526 100644
--- a/ports/javascript/mphalport.h
+++ b/ports/javascript/mphalport.h
@@ -28,7 +28,7 @@
 #include "lib/utils/interrupt_char.h"
 
 #define mp_hal_stdin_rx_chr() (0)
-void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len);
+void mp_hal_stdout_tx_strn(const char *str, size_t len);
 
 void mp_hal_delay_ms(mp_uint_t ms);
 void mp_hal_delay_us(mp_uint_t us);
diff --git a/ports/javascript/wrapper.js b/ports/javascript/wrapper.js
index 6109de902..84ad2ae3a 100644
--- a/ports/javascript/wrapper.js
+++ b/ports/javascript/wrapper.js
@@ -24,47 +24,54 @@
  * THE SOFTWARE.
  */
 
-mp_js_init = Module.cwrap('mp_js_init', 'null', ['number']);
-mp_js_do_str = Module.cwrap('mp_js_do_str', 'null', ['string']);
-mp_js_init_repl = Module.cwrap('mp_js_init_repl', 'null', ['null']);
-mp_js_process_char = Module.cwrap('mp_js_process_char', 'number', ['number']);
+var Module = {};
 
-var MP_JS_EPOCH = (new Date()).getTime();
+var mainProgram = function()
+{
+  mp_js_init = Module.cwrap('mp_js_init', 'null', ['number']);
+  mp_js_do_str = Module.cwrap('mp_js_do_str', 'null', ['string']);
+  mp_js_init_repl = Module.cwrap('mp_js_init_repl', 'null', ['null']);
+  mp_js_process_char = Module.cwrap('mp_js_process_char', 'number', ['number']);
 
-if (typeof window === 'undefined' && require.main === module) {
-    var fs = require('fs');
-    var stack_size = 64 * 1024;
-    var contents = '';
-    var repl = true;
+  MP_JS_EPOCH = (new Date()).getTime();
 
-    for (var i = 0; i < process.argv.length; i++) {
-        if (process.argv[i] === '-X' && i < process.argv.length - 1) {
-            if (process.argv[i + 1].includes('stack=')) {
-                stack_size = parseInt(process.argv[i + 1].split('stack=')[1]);
-                if (process.argv[i + 1].substr(-1).toLowerCase() === 'k') {
-                    stack_size *= 1024;
-                } else if (process.argv[i + 1].substr(-1).toLowerCase() === 'm') {
-                    stack_size *= 1024 * 1024;
-                }
-            }
-        } else if (process.argv[i].includes('.py')) {
-            contents += fs.readFileSync(process.argv[i], 'utf8');
-            repl = false;;
-        }
-    }
-    mp_js_init(stack_size);
+  if (typeof window === 'undefined' && require.main === module) {
+      var fs = require('fs');
+      var stack_size = 64 * 1024;
+      var contents = '';
+      var repl = true;
 
-    if (repl) {
-        mp_js_init_repl();
-        process.stdin.setRawMode(true);
-        process.stdin.on('data', function (data) {
-            for (var i = 0; i < data.length; i++) {
-                if (mp_js_process_char(data[i])) {
-                    process.exit()
-                }
-            }
-        });
-    } else {
-        mp_js_do_str(contents);
-    }
+      for (var i = 0; i < process.argv.length; i++) {
+          if (process.argv[i] === '-X' && i < process.argv.length - 1) {
+              if (process.argv[i + 1].includes('stack=')) {
+                  stack_size = parseInt(process.argv[i + 1].split('stack=')[1]);
+                  if (process.argv[i + 1].substr(-1).toLowerCase() === 'k') {
+                      stack_size *= 1024;
+                  } else if (process.argv[i + 1].substr(-1).toLowerCase() === 'm') {
+                      stack_size *= 1024 * 1024;
+                  }
+              }
+          } else if (process.argv[i].includes('.py')) {
+              contents += fs.readFileSync(process.argv[i], 'utf8');
+              repl = false;;
+          }
+      }
+      mp_js_init(stack_size);
+
+      if (repl) {
+          mp_js_init_repl();
+          process.stdin.setRawMode(true);
+          process.stdin.on('data', function (data) {
+              for (var i = 0; i < data.length; i++) {
+                  if (mp_js_process_char(data[i])) {
+                      process.exit()
+                  }
+              }
+          });
+      } else {
+          mp_js_do_str(contents);
+      }
+  }
 }
+
+Module["onRuntimeInitialized"] = mainProgram;
\ No newline at end of file