Fix macOS build

.gitignore

@@ -1 +1,2 @@
 *.egg-info/
+*.so

.travis.yml

@@ -2,6 +2,10 @@ sudo: false
 language: python
 python:
   - "3.7"
+os:
+  - linux
+  - osx
+  - windows
 install:
   - pip install six blist unittest2 pytz
   - pip install -e .

README.md

@@ -5,12 +5,6 @@
 - Original author: [xtao (Xu Tao)](https://github.com/xtao)
 - Inspired by [Pandas' ujson](https://github.com/pandas-dev/pandas/tree/master/pandas/_libs/src/ujson/python)
 
-## Environment
-
-Test on Ubuntu 18.04 with Python3.7
-
-Known issue: macOS support.
-
 ## How to install
 
 ```sh

python/objToJSON.c

@@ -92,7 +92,7 @@ struct PyDictIterState
 //#define PRINTMARK() fprintf(stderr, "%s: MARK(%d)\n", __FILE__, __LINE__)
 #define PRINTMARK()
 
-void initObjToJSON(void)
+void *initObjToJSON(void)
 {
   PyObject* mod_decimal = PyImport_ImportModule("decimal");
   if (mod_decimal)

python/ujson.c

@@ -41,7 +41,7 @@ Numeric decoder derived from from TCL library
 
 /* objToJSON */
 PyObject* objToJSON(PyObject* self, PyObject *args, PyObject *kwargs);
-void initObjToJSON(void);
+void *initObjToJSON(void);
 
 /* JSONToObj */
 PyObject* JSONToObj(PyObject* self, PyObject *args, PyObject *kwargs);