From 05fe9751dfb370b0fb726e95bc36674468116db4 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 2 Sep 2022 16:57:51 -0700
Subject: [PATCH] provide function declaration with prototypes

Fixes build with clang-15+

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 libgeis/backend/grail/geis_grail_window_grab.c           | 2 +-
 libgeis/backend/grail/geis_ugsubscription_store.c        | 2 +-
 libgeis/backend/grail/geis_ugsubscription_store.h        | 2 +-
 libgeis/backend/test_fixture/geis_backend_test_fixture.c | 4 ++--
 libgeis/geis.c                                           | 2 +-
 libgeis/geis_backend_multiplexor.c                       | 4 ++--
 libgeis/geis_backend_multiplexor.h                       | 2 +-
 libgeis/geis_class.c                                     | 2 +-
 libgeis/geis_class.h                                     | 2 +-
 libgeis/geis_device.c                                    | 2 +-
 libgeis/geis_device.h                                    | 2 +-
 libgeis/geis_event_queue.c                               | 2 +-
 libgeis/geis_event_queue.h                               | 2 +-
 libgeis/geis_filter.c                                    | 2 +-
 libgeis/geis_filter.h                                    | 2 +-
 libgeis/geis_filterable.c                                | 2 +-
 libgeis/geis_filterable.h                                | 2 +-
 libgeis/geis_frame.c                                     | 2 +-
 libgeis/geis_frame.h                                     | 2 +-
 libgeis/geis_group.c                                     | 2 +-
 libgeis/geis_group.h                                     | 2 +-
 libgeis/geis_region.c                                    | 2 +-
 libgeis/geis_region.h                                    | 2 +-
 libgeis/geis_touch.c                                     | 2 +-
 libgeis/geis_touch.h                                     | 2 +-
 libgeis/server/geis_dbus_client_proxy.c                  | 2 +-
 libgeis/server/geis_dbus_proxy_box.c                     | 2 +-
 libgeis/server/geis_dbus_proxy_box.h                     | 2 +-
 libs/geis-dbus/geis_dbus_dispatcher.c                    | 2 +-
 libs/geis-util/geis_logging.c                            | 2 +-
 testsuite/geis1/check_gesture_attrs.c                    | 2 +-
 testsuite/geis1/check_gesture_types.c                    | 2 +-
 testsuite/geis1/check_instance.c                         | 2 +-
 testsuite/geis1/check_subscription.c                     | 2 +-
 testsuite/geis2/check_attr.c                             | 2 +-
 testsuite/geis2/check_class.c                            | 2 +-
 testsuite/geis2/check_config.c                           | 2 +-
 testsuite/geis2/check_device.c                           | 2 +-
 testsuite/geis2/check_error_codes.c                      | 2 +-
 testsuite/geis2/check_event.c                            | 2 +-
 testsuite/geis2/check_filter.c                           | 2 +-
 testsuite/geis2/check_frame.c                            | 2 +-
 testsuite/geis2/check_geis_new.c                         | 2 +-
 testsuite/geis2/check_general_types.c                    | 2 +-
 testsuite/geis2/check_region.c                           | 2 +-
 testsuite/geis2/check_subscription.c                     | 2 +-
 tools/geis-server/geis-server.c                          | 2 +-
 47 files changed, 49 insertions(+), 49 deletions(-)

diff --git a/libgeis/backend/grail/geis_grail_window_grab.c b/libgeis/backend/grail/geis_grail_window_grab.c
index 003adee..f8480ac 100644
--- a/libgeis/backend/grail/geis_grail_window_grab.c
+++ b/libgeis/backend/grail/geis_grail_window_grab.c
@@ -49,7 +49,7 @@ static const GeisFloat _geis_grail_window_grab_store_growth_factor = 1.7;
 
 
 static GeisGrailWindowGrabStore
-_window_grab_allocate()
+_window_grab_allocate(void)
 {
   GeisGrailWindowGrabStore wgs = malloc(sizeof(struct GeisGrailWindowGrabStore));
   if (!wgs)
diff --git a/libgeis/backend/grail/geis_ugsubscription_store.c b/libgeis/backend/grail/geis_ugsubscription_store.c
index bb1f0bb..cb7e620 100644
--- a/libgeis/backend/grail/geis_ugsubscription_store.c
+++ b/libgeis/backend/grail/geis_ugsubscription_store.c
@@ -42,7 +42,7 @@ static const GeisFloat _geis_grail_ugsubscription_store_growth_factor = 1.7;
  * Creates a new, empty grail subscription store.
  */
 GeisUGSubscriptionStore
-geis_ugsubscription_store_new()
+geis_ugsubscription_store_new(void)
 {
   GeisUGSubscriptionStore store = geis_bag_new(sizeof(struct GeisUGSubscription),
                                   _geis_grail_ugsubscription_store_default_size,
diff --git a/libgeis/backend/grail/geis_ugsubscription_store.h b/libgeis/backend/grail/geis_ugsubscription_store.h
index a93e1b6..06273ef 100644
--- a/libgeis/backend/grail/geis_ugsubscription_store.h
+++ b/libgeis/backend/grail/geis_ugsubscription_store.h
@@ -41,7 +41,7 @@ typedef GeisBag GeisUGSubscriptionStore;
  * @returns a pointer to a valid store, or NULL to indicate failure.
  */
 GeisUGSubscriptionStore
-geis_ugsubscription_store_new();
+geis_ugsubscription_store_new(void);
 
 /**
  * Destroys a grail subscription store.
diff --git a/libgeis/backend/test_fixture/geis_backend_test_fixture.c b/libgeis/backend/test_fixture/geis_backend_test_fixture.c
index 5912acb..099cde4 100644
--- a/libgeis/backend/test_fixture/geis_backend_test_fixture.c
+++ b/libgeis/backend/test_fixture/geis_backend_test_fixture.c
@@ -434,7 +434,7 @@ _token_free_subscription_pdata(GeisBackendToken gbtoken GEIS_UNUSED,
 }
 
 __attribute__((constructor))
-static void _register_test_fixture()
+static void _register_test_fixture(void)
 {
   geis_register_backend(GEIS_INIT_MOCK_BACKEND,
                         sizeof(struct GeisBackendTestFixture),
@@ -444,6 +444,6 @@ static void _register_test_fixture()
 
 /* A dummy routine to force linkage of this module without dlopening it */
 void
-geis_include_backend_test_fixture()
+geis_include_backend_test_fixture(void)
 {
 }
diff --git a/libgeis/geis.c b/libgeis/geis.c
index 4290d19..3f7bd12 100644
--- a/libgeis/geis.c
+++ b/libgeis/geis.c
@@ -402,7 +402,7 @@ geis_filterable_attribute_foreach(Geis geis,
  * Creates a new empty Geis API instance.
  */
 static Geis
-geis_new_empty()
+geis_new_empty(void)
 {
   geis_error_clear(NULL);
   Geis geis = calloc(1, sizeof(struct _Geis));
diff --git a/libgeis/geis_backend_multiplexor.c b/libgeis/geis_backend_multiplexor.c
index 3f80080..0f76198 100644
--- a/libgeis/geis_backend_multiplexor.c
+++ b/libgeis/geis_backend_multiplexor.c
@@ -60,7 +60,7 @@ struct _GeisBackendMultiplexor
  * Creates a new container for callback info.
  */
 static CallbackInfoBag
-_callback_info_bag_new()
+_callback_info_bag_new(void)
 {
   CallbackInfoBag cbib = calloc(1, sizeof(struct CallbackInfoBag));
   if (!cbib)
@@ -209,7 +209,7 @@ _callback_info_bag_release(CallbackInfoBag cbib, int fd)
  * Creates a new backend multiplexor.
  */
 GeisBackendMultiplexor
-geis_backend_multiplexor_new()
+geis_backend_multiplexor_new(void)
 {
   GeisBackendMultiplexor mx = calloc(1, sizeof(struct _GeisBackendMultiplexor));
   if (!mx)
diff --git a/libgeis/geis_backend_multiplexor.h b/libgeis/geis_backend_multiplexor.h
index ff4c318..8e7102e 100644
--- a/libgeis/geis_backend_multiplexor.h
+++ b/libgeis/geis_backend_multiplexor.h
@@ -74,7 +74,7 @@ typedef void (*GeisBackendFdEventCallback)(int                             fd,
 /**
  * Constructs a new back end multiplexor.
  */
-GeisBackendMultiplexor geis_backend_multiplexor_new();
+GeisBackendMultiplexor geis_backend_multiplexor_new(void);
 
 /**
  * A reasonable default value for the max_events_per_pump parameter to
diff --git a/libgeis/geis_class.c b/libgeis/geis_class.c
index e889e4b..5c26a87 100644
--- a/libgeis/geis_class.c
+++ b/libgeis/geis_class.c
@@ -46,7 +46,7 @@ static const int gesture_class_bag_growth_constant = 2;
  * Creates a new class bag,
  */
 GeisGestureClassBag
-geis_gesture_class_bag_new()
+geis_gesture_class_bag_new(void)
 {
   GeisGestureClassBag bag = calloc(1, sizeof(struct _GeisGestureClassBag));
   if (!bag)
diff --git a/libgeis/geis_class.h b/libgeis/geis_class.h
index 1d60998..724c353 100644
--- a/libgeis/geis_class.h
+++ b/libgeis/geis_class.h
@@ -35,7 +35,7 @@ typedef struct _GeisGestureClassBag *GeisGestureClassBag;
 /**
  * Creates a new class bag,
  */
-GeisGestureClassBag geis_gesture_class_bag_new();
+GeisGestureClassBag geis_gesture_class_bag_new(void);
 
 /**
  * Destroys a gesture class bag.
diff --git a/libgeis/geis_device.c b/libgeis/geis_device.c
index 1f61fc1..ff3216b 100644
--- a/libgeis/geis_device.c
+++ b/libgeis/geis_device.c
@@ -44,7 +44,7 @@ static const int device_bag_growth_constant = 2;
 
 
 GeisDeviceBag
-geis_device_bag_new()
+geis_device_bag_new(void)
 {
   GeisDeviceBag bag = calloc(1, sizeof(struct _GeisDeviceBag));
   if (!bag)
diff --git a/libgeis/geis_device.h b/libgeis/geis_device.h
index c411e54..707943b 100644
--- a/libgeis/geis_device.h
+++ b/libgeis/geis_device.h
@@ -35,7 +35,7 @@ typedef struct _GeisDeviceBag *GeisDeviceBag;
 /**
  * Creates a new device bag,
  */
-GeisDeviceBag geis_device_bag_new();
+GeisDeviceBag geis_device_bag_new(void);
 
 /**
  * Destroys a device bag.
diff --git a/libgeis/geis_event_queue.c b/libgeis/geis_event_queue.c
index 0b7d0fb..f357683 100644
--- a/libgeis/geis_event_queue.c
+++ b/libgeis/geis_event_queue.c
@@ -50,7 +50,7 @@ struct _GeisEventQueue
  * Creates a new Geis Event queue.
  */
 GeisEventQueue
-geis_event_queue_new()
+geis_event_queue_new(void)
 {
   GeisEventQueue queue = calloc(1, sizeof(struct _GeisEventQueue));
   if (!queue)
diff --git a/libgeis/geis_event_queue.h b/libgeis/geis_event_queue.h
index e4c186d..5f3da1d 100644
--- a/libgeis/geis_event_queue.h
+++ b/libgeis/geis_event_queue.h
@@ -41,7 +41,7 @@ typedef struct _GeisEventQueue *GeisEventQueue;
 /**
  * Creates a new Geis Event queue.
  */
-GeisEventQueue geis_event_queue_new();
+GeisEventQueue geis_event_queue_new(void);
 
 /**
  * Destroys a Geis Event queue.
diff --git a/libgeis/geis_filter.c b/libgeis/geis_filter.c
index 4fe5da6..83d65a8 100644
--- a/libgeis/geis_filter.c
+++ b/libgeis/geis_filter.c
@@ -57,7 +57,7 @@ static GeisSize s_filter_oid = 0;
  * Creates a new filter bag,
  */
 GeisFilterBag
-geis_filter_bag_new()
+geis_filter_bag_new(void)
 {
   GeisFilterBag bag = calloc(1, sizeof(struct _GeisFilterBag));
   if (!bag)
diff --git a/libgeis/geis_filter.h b/libgeis/geis_filter.h
index 7b613bf..f825bb7 100644
--- a/libgeis/geis_filter.h
+++ b/libgeis/geis_filter.h
@@ -42,7 +42,7 @@ typedef GeisFilter *GeisFilterIterator;
 /**
  * Creates a new filter bag,
  */
-GeisFilterBag geis_filter_bag_new();
+GeisFilterBag geis_filter_bag_new(void);
 
 /**
  * Destroys a filter bag.
diff --git a/libgeis/geis_filterable.c b/libgeis/geis_filterable.c
index 57bd4ac..5fb4b0c 100644
--- a/libgeis/geis_filterable.c
+++ b/libgeis/geis_filterable.c
@@ -40,7 +40,7 @@ struct FilterableAttributeBag
  * Constructs a new filterable attribute bag.
  */
 FilterableAttributeBag
-geis_filterable_attribute_bag_new()
+geis_filterable_attribute_bag_new(void)
 {
   FilterableAttributeBag bag = calloc(1, sizeof(struct FilterableAttributeBag));
   if (!bag)
diff --git a/libgeis/geis_filterable.h b/libgeis/geis_filterable.h
index 6d400fc..63c563d 100644
--- a/libgeis/geis_filterable.h
+++ b/libgeis/geis_filterable.h
@@ -86,7 +86,7 @@ geis_filterable_attribute_init(GeisFilterableAttribute fa,
  * Constructs a new filterable attribute bag.
  */
 FilterableAttributeBag
-geis_filterable_attribute_bag_new();
+geis_filterable_attribute_bag_new(void);
 
 /**
  * Destroys a filterable attribute bag.
diff --git a/libgeis/geis_frame.c b/libgeis/geis_frame.c
index ebe11a1..068d9aa 100644
--- a/libgeis/geis_frame.c
+++ b/libgeis/geis_frame.c
@@ -57,7 +57,7 @@ struct _GeisFrameSet
  * Creates a new, empty frame set.
  */
 GeisFrameSet
-geis_frameset_new()
+geis_frameset_new(void)
 {
   GeisFrameSet frameset = calloc(1, sizeof(struct _GeisFrameSet));
   if (!frameset)
diff --git a/libgeis/geis_frame.h b/libgeis/geis_frame.h
index e0d1eb6..4a4b0ba 100644
--- a/libgeis/geis_frame.h
+++ b/libgeis/geis_frame.h
@@ -32,7 +32,7 @@ typedef struct _GeisFrameSet *GeisFrameSet;
 /**
  * Creates a new, empty frame set.
  */
-GeisFrameSet geis_frameset_new();
+GeisFrameSet geis_frameset_new(void);
 
 /**
  * Destroys a frame set and all framees contained in it.
diff --git a/libgeis/geis_group.c b/libgeis/geis_group.c
index 0829bd4..4c51a39 100644
--- a/libgeis/geis_group.c
+++ b/libgeis/geis_group.c
@@ -42,7 +42,7 @@ struct _GeisGroupSet
  * Creates a new, empty group set.
  */
 GeisGroupSet
-geis_groupset_new()
+geis_groupset_new(void)
 {
   GeisGroupSet groupset = calloc(1, sizeof(struct _GeisGroupSet));
   if (!groupset)
diff --git a/libgeis/geis_group.h b/libgeis/geis_group.h
index 76e0efc..c44ce62 100644
--- a/libgeis/geis_group.h
+++ b/libgeis/geis_group.h
@@ -31,7 +31,7 @@
 /**
  * Creates a new, empty group set.
  */
-GeisGroupSet geis_groupset_new();
+GeisGroupSet geis_groupset_new(void);
 
 /**
  * Destroys a group set and all groups contained in it.
diff --git a/libgeis/geis_region.c b/libgeis/geis_region.c
index fc8cc1e..18181cb 100644
--- a/libgeis/geis_region.c
+++ b/libgeis/geis_region.c
@@ -52,7 +52,7 @@ static const int region_bag_growth_constant = 2;
  * Constructs a region bag.
  */
 GeisRegionBag
-geis_region_bag_new()
+geis_region_bag_new(void)
 {
   GeisRegionBag bag = calloc(1, sizeof(struct _GeisRegionBag));
   if (!bag)
diff --git a/libgeis/geis_region.h b/libgeis/geis_region.h
index 53a52b8..18d908f 100644
--- a/libgeis/geis_region.h
+++ b/libgeis/geis_region.h
@@ -49,7 +49,7 @@ typedef struct _GeisRegionBag *GeisRegionBag;
 /**
  * Creates a new region bag.
  */
-GeisRegionBag geis_region_bag_new();
+GeisRegionBag geis_region_bag_new(void);
 
 /**
  * Destroys a region bag.
diff --git a/libgeis/geis_touch.c b/libgeis/geis_touch.c
index 74d1b3e..be0f1a7 100644
--- a/libgeis/geis_touch.c
+++ b/libgeis/geis_touch.c
@@ -43,7 +43,7 @@ struct _GeisTouchSet
  * Creates a new, empty touch set.
  */
 GeisTouchSet
-geis_touchset_new()
+geis_touchset_new(void)
 {
   GeisTouchSet touchset = calloc(1, sizeof(struct _GeisTouchSet));
   if (!touchset)
diff --git a/libgeis/geis_touch.h b/libgeis/geis_touch.h
index 62af610..b64c755 100644
--- a/libgeis/geis_touch.h
+++ b/libgeis/geis_touch.h
@@ -30,7 +30,7 @@
 /**
  * Creates a new, empty touch set.
  */
-GeisTouchSet geis_touchset_new();
+GeisTouchSet geis_touchset_new(void);
 
 /**
  * Destroys a touch set and all touches contained in it.
diff --git a/libgeis/server/geis_dbus_client_proxy.c b/libgeis/server/geis_dbus_client_proxy.c
index 3f1af47..65f229b 100644
--- a/libgeis/server/geis_dbus_client_proxy.c
+++ b/libgeis/server/geis_dbus_client_proxy.c
@@ -52,7 +52,7 @@ struct GeisDBusClientProxy
  * failure.
  */
 GeisDBusClientProxy
-_client_proxy_allocate()
+_client_proxy_allocate(void)
 {
   GeisDBusClientProxy proxy = calloc(1, sizeof(struct GeisDBusClientProxy));
   return proxy;
diff --git a/libgeis/server/geis_dbus_proxy_box.c b/libgeis/server/geis_dbus_proxy_box.c
index 4c7752a..f129bc3 100644
--- a/libgeis/server/geis_dbus_proxy_box.c
+++ b/libgeis/server/geis_dbus_proxy_box.c
@@ -49,7 +49,7 @@ struct GeisDBusProxyBox
  * Constructs a %GeisDBusProxyBox.
  */
 GeisDBusProxyBox
-geis_dbus_proxy_box_new()
+geis_dbus_proxy_box_new(void)
 {
   GeisDBusProxyBox box = calloc(1, sizeof(struct GeisDBusProxyBox));
   if (!box)
diff --git a/libgeis/server/geis_dbus_proxy_box.h b/libgeis/server/geis_dbus_proxy_box.h
index d8a70f5..47e84b7 100644
--- a/libgeis/server/geis_dbus_proxy_box.h
+++ b/libgeis/server/geis_dbus_proxy_box.h
@@ -47,7 +47,7 @@ typedef struct GeisDBusProxyBoxNode *GeisDBusProxyBoxIterator;
  * @returns a valid %GeisDBusProxyBox or NULL on failure.
  */
 GeisDBusProxyBox
-geis_dbus_proxy_box_new();
+geis_dbus_proxy_box_new(void);
 
 /**
  * Destroys a %GeisDBusProxyBox.
diff --git a/libs/geis-dbus/geis_dbus_dispatcher.c b/libs/geis-dbus/geis_dbus_dispatcher.c
index 10c4134..d8a3f9d 100644
--- a/libs/geis-dbus/geis_dbus_dispatcher.c
+++ b/libs/geis-dbus/geis_dbus_dispatcher.c
@@ -82,7 +82,7 @@ struct GeisDBusDispatcher
  * assumption that if you're creating a bag you're going to use it.
  */
 static GeisDBusWatchBag 
-_geis_dbus_watch_bag_new()
+_geis_dbus_watch_bag_new(void)
 {
   GeisDBusWatchBag bag = calloc(1, sizeof(struct GeisDBusWatchBag));
   if (!bag)
diff --git a/libs/geis-util/geis_logging.c b/libs/geis-util/geis_logging.c
index a02077b..030a591 100644
--- a/libs/geis-util/geis_logging.c
+++ b/libs/geis-util/geis_logging.c
@@ -31,7 +31,7 @@ static const char *error_marker   = "error";
 
 
 static int
-reporting_level()
+reporting_level(void)
 {
   char *level = getenv("GEIS_DEBUG");
   if (level)
diff --git a/testsuite/geis1/check_gesture_attrs.c b/testsuite/geis1/check_gesture_attrs.c
index 2228d2f..d990c7c 100644
--- a/testsuite/geis1/check_gesture_attrs.c
+++ b/testsuite/geis1/check_gesture_attrs.c
@@ -169,7 +169,7 @@ END_TEST
 
 
 Suite *
-geis1_gesture_attrs_new()
+geis1_gesture_attrs_new(void)
 {
   Suite *s = suite_create("geis1_gesture_attrs");
   TCase *test;
diff --git a/testsuite/geis1/check_gesture_types.c b/testsuite/geis1/check_gesture_types.c
index 3492062..980f8fb 100644
--- a/testsuite/geis1/check_gesture_types.c
+++ b/testsuite/geis1/check_gesture_types.c
@@ -62,7 +62,7 @@ START_TEST(gesture_types)
 END_TEST
 
 Suite *
-geis1_gesture_types_new()
+geis1_gesture_types_new(void)
 {
   Suite *s = suite_create("geis1_gesture_types");
   TCase *test;
diff --git a/testsuite/geis1/check_instance.c b/testsuite/geis1/check_instance.c
index ac897ab..584abfd 100644
--- a/testsuite/geis1/check_instance.c
+++ b/testsuite/geis1/check_instance.c
@@ -44,7 +44,7 @@ END_TEST
 
 
 Suite *
-geis1_instance_suite_new()
+geis1_instance_suite_new(void)
 {
   TCase *create;
   Suite *s = suite_create("geis1_instance_suite");
diff --git a/testsuite/geis1/check_subscription.c b/testsuite/geis1/check_subscription.c
index 0797337..e69c332 100644
--- a/testsuite/geis1/check_subscription.c
+++ b/testsuite/geis1/check_subscription.c
@@ -146,7 +146,7 @@ END_TEST
 
 
 Suite *
-geis1_subscription_new()
+geis1_subscription_new(void)
 {
   Suite *s = suite_create("geis1_subscription");
   TCase *test;
diff --git a/testsuite/geis2/check_attr.c b/testsuite/geis2/check_attr.c
index 9e01219..58c8ebc 100644
--- a/testsuite/geis2/check_attr.c
+++ b/testsuite/geis2/check_attr.c
@@ -42,7 +42,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_attr_suite_new()
+geis2_attr_suite_new(void)
 {
   Suite *s = suite_create("geis2_attr");
 
diff --git a/testsuite/geis2/check_class.c b/testsuite/geis2/check_class.c
index ca7accd..b60d827 100644
--- a/testsuite/geis2/check_class.c
+++ b/testsuite/geis2/check_class.c
@@ -92,7 +92,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_gesture_class_suite_new()
+geis2_gesture_class_suite_new(void)
 {
   TCase *gesture_class;
   TCase *usage;
diff --git a/testsuite/geis2/check_config.c b/testsuite/geis2/check_config.c
index a9fc9c1..03b3137 100644
--- a/testsuite/geis2/check_config.c
+++ b/testsuite/geis2/check_config.c
@@ -48,7 +48,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_config_suite_new()
+geis2_config_suite_new(void)
 {
   Suite *s = suite_create("geis2_configuration");
 
diff --git a/testsuite/geis2/check_device.c b/testsuite/geis2/check_device.c
index 8b3b7be..9583cb5 100644
--- a/testsuite/geis2/check_device.c
+++ b/testsuite/geis2/check_device.c
@@ -99,7 +99,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_device_suite_new()
+geis2_device_suite_new(void)
 {
   TCase *device;
   TCase *usage;
diff --git a/testsuite/geis2/check_error_codes.c b/testsuite/geis2/check_error_codes.c
index 9c7508d..57e7fc7 100644
--- a/testsuite/geis2/check_error_codes.c
+++ b/testsuite/geis2/check_error_codes.c
@@ -20,7 +20,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_error_codes_suite_new()
+geis2_error_codes_suite_new(void)
 {
   Suite *s = suite_create("geis2_error_codes");
 
diff --git a/testsuite/geis2/check_event.c b/testsuite/geis2/check_event.c
index 8ecda1d..c752a30 100644
--- a/testsuite/geis2/check_event.c
+++ b/testsuite/geis2/check_event.c
@@ -43,7 +43,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_event_suite_new()
+geis2_event_suite_new(void)
 {
   Suite *s = suite_create("geis2_event");
 
diff --git a/testsuite/geis2/check_filter.c b/testsuite/geis2/check_filter.c
index 3272a2a..afa23e5 100644
--- a/testsuite/geis2/check_filter.c
+++ b/testsuite/geis2/check_filter.c
@@ -67,7 +67,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_filter_suite_new()
+geis2_filter_suite_new(void)
 {
   TCase *filter;
   TCase *usage;
diff --git a/testsuite/geis2/check_frame.c b/testsuite/geis2/check_frame.c
index dce6faf..3ea3db0 100644
--- a/testsuite/geis2/check_frame.c
+++ b/testsuite/geis2/check_frame.c
@@ -172,7 +172,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_gesture_frame_suite_new()
+geis2_gesture_frame_suite_new(void)
 {
   Suite *s = suite_create("geis2_gesture_frame");
   TCase *gesture_frame;
diff --git a/testsuite/geis2/check_geis_new.c b/testsuite/geis2/check_geis_new.c
index 1fb8de2..36cd3e9 100644
--- a/testsuite/geis2/check_geis_new.c
+++ b/testsuite/geis2/check_geis_new.c
@@ -32,7 +32,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_geis_new_suite_new()
+geis2_geis_new_suite_new(void)
 {
   Suite *s = suite_create("geis2_geis_init");
 
diff --git a/testsuite/geis2/check_general_types.c b/testsuite/geis2/check_general_types.c
index 79e29bb..0f463d4 100644
--- a/testsuite/geis2/check_general_types.c
+++ b/testsuite/geis2/check_general_types.c
@@ -20,7 +20,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_general_types_suite_new()
+geis2_general_types_suite_new(void)
 {
   Suite *s = suite_create("geis2_general_types");
   TCase *create;
diff --git a/testsuite/geis2/check_region.c b/testsuite/geis2/check_region.c
index 3e64e0c..606350a 100644
--- a/testsuite/geis2/check_region.c
+++ b/testsuite/geis2/check_region.c
@@ -48,7 +48,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_region_suite_new()
+geis2_region_suite_new(void)
 {
   Suite *s = suite_create("geis2_region");
   TCase *creation;
diff --git a/testsuite/geis2/check_subscription.c b/testsuite/geis2/check_subscription.c
index a45c4ad..17a6779 100644
--- a/testsuite/geis2/check_subscription.c
+++ b/testsuite/geis2/check_subscription.c
@@ -161,7 +161,7 @@ END_TEST
 
 /* boilerplate */
 Suite *
-geis2_subscription_suite_new()
+geis2_subscription_suite_new(void)
 {
   TCase *create;
   TCase *usage;
diff --git a/tools/geis-server/geis-server.c b/tools/geis-server/geis-server.c
index 97c8b99..6600d8f 100644
--- a/tools/geis-server/geis-server.c
+++ b/tools/geis-server/geis-server.c
@@ -23,7 +23,7 @@
 
 
 int
-main()
+main(void)
 {
   GeisStatus status;
 
-- 
2.37.3