swig: fix usage of SWIGPYTHON for python specific code

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

src/CMakeLists.txt

@@ -71,6 +71,8 @@ endif ()
 
 find_package (SWIG)
 if (SWIG_FOUND)
+  set (CMAKE_C_FLAGS -DSWIG=${SWIG_FOUND})
+  set (CMAKE_CXX_CFLAGS -DSWIG=${SWIG_FOUND})
   include (${SWIG_USE_FILE})
 
   add_subdirectory (python)

src/gpio/gpio.c

@@ -124,7 +124,7 @@ maa_gpio_interrupt_handler(void* arg)
     for (;;) {
         ret = maa_gpio_wait_interrupt(dev->isr_value_fp);
         if (ret == MAA_SUCCESS) {
-#ifdef SWIG
+#ifdef SWIGPYTHON
             // In order to call a python object (all python functions are objects) we
             // need to aquire the GIL (Global Interpreter Lock). This may not always be
             // nessecary but especially if doing IO (like print()) python will segfault
@@ -202,7 +202,7 @@ maa_gpio_isr_exit(maa_gpio_context *dev)
 {
     maa_result_t ret = MAA_SUCCESS;
 
-#ifdef SWIG
+#ifdef SWIGPYTHON
     // Dereference our Python call back function
     Py_DECREF(dev->isr);
 #endif

src/maa.c

@@ -55,7 +55,7 @@ maa_init()
     if (plat != NULL) {
         return MAA_ERROR_PLATFORM_ALREADY_INITIALISED;
     }
-#ifdef SWIG
+#ifdef SWIGPYTHON
     // Initialise python threads, this allows use to grab the GIL when we are
     // required to do so
     Py_InitializeEx(0);

src/python/CMakeLists.txt

@@ -9,7 +9,7 @@ include_directories(
 swig_add_module (pymaa python pymaa.i ${maa_LIB_SRCS})
 swig_link_libraries (pymaa ${PYTHON_LIBRARIES})
 
-set (CMAKE_C_FLAGS -DSWIG=${SWIG_FOUND})
+set (CMAKE_C_FLAGS -DSWIGPYTHON=${SWIG_FOUND})
 
 if (DOXYGEN_FOUND)
   foreach (_file ${DOCFILES})