Don't use "exp" as a name so that it's doesn´t show up with searching for the function

src/joystick/bsd/SDL_bsdjoystick.c

@@ -552,7 +552,7 @@ BSD_JoystickUpdate(SDL_Joystick *joy)
 
     if (joy->hwdata->type == BSDJOY_JOY) {
         while (read(joy->hwdata->fd, &gameport, sizeof gameport) == sizeof gameport) {
-            if (abs(x - gameport.x) > 8) {
+            if (SDL_abs(x - gameport.x) > 8) {
                 x = gameport.x;
                 if (x < xmin) {
                     xmin = x;
@@ -569,7 +569,7 @@ BSD_JoystickUpdate(SDL_Joystick *joy)
                 v *= 32768 / ((xmax - xmin + 1) / 2);
                 SDL_PrivateJoystickAxis(joy, 0, v);
             }
-            if (abs(y - gameport.y) > 8) {
+            if (SDL_abs(y - gameport.y) > 8) {
                 y = gameport.y;
                 if (y < ymin) {
                     ymin = y;

src/joystick/windows/SDL_dinputjoystick.c

@@ -432,7 +432,7 @@ SDL_DINPUT_JoystickInit(void)
 static BOOL CALLBACK
 EnumJoystickDetectCallback(LPCDIDEVICEINSTANCE pDeviceInstance, LPVOID pContext)
 {
-#define CHECK(exp) { if(!(exp)) goto err; }
+#define CHECK(expression) { if(!(expression)) goto err; }
     JoyStick_DeviceData *pNewJoystick = NULL;
     JoyStick_DeviceData *pPrevJoystick = NULL;
     Uint16 *guid16;
@@ -553,7 +553,7 @@ typedef struct
 static BOOL CALLBACK
 EnumJoystickPresentCallback(LPCDIDEVICEINSTANCE pDeviceInstance, LPVOID pContext)
 {
-#define CHECK(exp) { if(!(exp)) goto err; }
+#define CHECK(expression) { if(!(expression)) goto err; }
     Joystick_PresentData *pData = (Joystick_PresentData *)pContext;
     Uint16 vendor = 0;
     Uint16 product = 0;

src/joystick/windows/SDL_rawinputjoystick.c

@@ -679,7 +679,7 @@ RAWINPUT_DeviceFromHandle(HANDLE hDevice)
 static void
 RAWINPUT_AddDevice(HANDLE hDevice)
 {
-#define CHECK(exp) { if(!(exp)) goto err; }
+#define CHECK(expression) { if(!(expression)) goto err; }
     SDL_RAWINPUT_Device *device = NULL;
     SDL_RAWINPUT_Device *curr, *last;
     RID_DEVICE_INFO rdi;