Add -Wmissing-prototypes

This requires functions without a prototype definition to be static.
This allows to detect dead code, export less symbols and put shared
functions in headers.

24 files changed, 66 insertions, 123 deletions

diff --git a/backend/drm/atomic.c b/backend/drm/atomic.c
index 023307fc..71b18f98 100644
--- a/backend/drm/atomic.c
+++ b/backend/drm/atomic.c
@@ -154,9 +154,6 @@ static bool atomic_conn_enable(struct wlr_drm_backend *drm,
 		true);
 }
 
-bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
-
 static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc, struct gbm_bo *bo) {
 	if (!crtc || !crtc->cursor) {
@@ -185,9 +182,6 @@ static bool atomic_crtc_set_cursor(struct wlr_drm_backend *drm,
 	return atomic_end(drm->fd, &atom);
 }
 
-bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm,
-		struct wlr_drm_crtc *crtc, int x, int y);
-
 static bool atomic_crtc_move_cursor(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc, int x, int y) {
 	if (!crtc || !crtc->cursor) {
diff --git a/backend/drm/legacy.c b/backend/drm/legacy.c
index 79cd05b9..32d68814 100644
--- a/backend/drm/legacy.c
+++ b/backend/drm/legacy.c
@@ -68,13 +68,13 @@ bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm,
 	return !drmModeMoveCursor(drm->fd, crtc->id, x, y);
 }
 
-bool legacy_crtc_set_gamma(struct wlr_drm_backend *drm,
+static bool legacy_crtc_set_gamma(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc, size_t size,
 		uint16_t *r, uint16_t *g, uint16_t *b) {
 	return !drmModeCrtcSetGamma(drm->fd, crtc->id, (uint32_t)size, r, g, b);
 }
 
-size_t legacy_crtc_get_gamma_size(struct wlr_drm_backend *drm,
+static size_t legacy_crtc_get_gamma_size(struct wlr_drm_backend *drm,
 		struct wlr_drm_crtc *crtc) {
 	return (size_t)crtc->legacy_crtc->gamma_size;
 }
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index 19c66f38..fa29ef93 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -9,7 +9,7 @@
 #include "backend/libinput.h"
 #include "util/signal.h"
 
-struct wlr_libinput_input_device *get_libinput_device_from_device(
+static struct wlr_libinput_input_device *get_libinput_device_from_device(
 		struct wlr_input_device *wlr_dev) {
 	assert(wlr_input_device_is_libinput(wlr_dev));
 	return (struct wlr_libinput_input_device *)wlr_dev;
diff --git a/backend/wayland/wl_seat.c b/backend/wayland/wl_seat.c
index cbe502e6..f80cf829 100644
--- a/backend/wayland/wl_seat.c
+++ b/backend/wayland/wl_seat.c
@@ -447,7 +447,7 @@ static struct zwp_pointer_gesture_pinch_v1_listener gesture_pinch_impl = {
 };
 
 
-void relative_pointer_handle_relative_motion(void *data,
+static void relative_pointer_handle_relative_motion(void *data,
 		struct zwp_relative_pointer_v1 *relative_pointer, uint32_t utime_hi,
 		uint32_t utime_lo, wl_fixed_t dx, wl_fixed_t dy, wl_fixed_t dx_unaccel,
 		wl_fixed_t dy_unaccel) {
diff --git a/examples/dmabuf-capture.c b/examples/dmabuf-capture.c
index cbe50e7d..bad8ccac 100644
--- a/examples/dmabuf-capture.c
+++ b/examples/dmabuf-capture.c
@@ -461,7 +461,7 @@ static void register_cb(struct capture_context *ctx) {
 			&frame_listener, ctx);
 }
 
-void *vid_encode_thread(void *arg) {
+static void *vid_encode_thread(void *arg) {
 	int err = 0;
 	struct capture_context *ctx = arg;
 
@@ -686,7 +686,7 @@ static int init_encoding(struct capture_context *ctx) {
 
 struct capture_context *q_ctx = NULL;
 
-void on_quit_signal(int signo) {
+static void on_quit_signal(int signo) {
 	printf("\r");
 	av_log(q_ctx, AV_LOG_WARNING, "Quitting!\n");
 	q_ctx->quit = true;
diff --git a/examples/idle.c b/examples/idle.c
index 0641d4fd..0f3a7f80 100644
--- a/examples/idle.c
+++ b/examples/idle.c
@@ -52,7 +52,7 @@ static const struct org_kde_kwin_idle_timeout_listener idle_timer_listener = {
 	.resumed = handle_resume,
 };
 
-int parse_args(int argc, char *argv[]) {
+static int parse_args(int argc, char *argv[]) {
 	int c;
 	while ((c = getopt(argc, argv, "c:hs:t:")) != -1) {
 		switch(c)
@@ -81,7 +81,7 @@ int parse_args(int argc, char *argv[]) {
 	return 0;
 }
 
-void *simulate_activity(void *data) {
+static void *simulate_activity(void *data) {
 	sleep(simulate_activity_timeout);
 	fprintf(stdout, "simulate user activity\n");
 	struct thread_args *arg = data;
@@ -90,7 +90,7 @@ void *simulate_activity(void *data) {
 	return NULL;
 }
 
-void *close_program(void *data) {
+static void *close_program(void *data) {
 	sleep(close_timeout);
 	struct thread_args *arg = data;
 	org_kde_kwin_idle_timeout_release(arg->timer);
@@ -100,7 +100,7 @@ void *close_program(void *data) {
 	return NULL;
 }
 
-void *main_loop(void *data) {
+static void *main_loop(void *data) {
 	struct wl_display *display = data;
 	while (wl_display_dispatch(display) != -1) {
 		;
diff --git a/examples/multi-pointer.c b/examples/multi-pointer.c
index 691bc49d..28f6eca8 100644
--- a/examples/multi-pointer.c
+++ b/examples/multi-pointer.c
@@ -68,7 +68,7 @@ struct sample_keyboard {
 	struct wl_listener destroy;
 };
 
-void configure_cursor(struct wlr_cursor *cursor, struct wlr_input_device *device,
+static void configure_cursor(struct wlr_cursor *cursor, struct wlr_input_device *device,
 		 struct sample_state *sample) {
 	struct sample_output *output;
 	wlr_log(WLR_ERROR, "Configuring cursor %p for device %p", cursor, device);
@@ -88,7 +88,7 @@ void configure_cursor(struct wlr_cursor *cursor, struct wlr_input_device *device
 	}
 }
 
-void output_frame_notify(struct wl_listener *listener, void *data) {
+static void output_frame_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *output = wl_container_of(listener, output, frame);
 	struct sample_state *sample = output->sample;
 	struct wlr_output *wlr_output = output->output;
@@ -127,27 +127,7 @@ static void cursor_destroy(struct sample_cursor *cursor) {
 	free(cursor);
 }
 
-void input_remove_notify(struct wl_listener *listener, void *data) {
-	struct wlr_input_device *device = data;
-	struct sample_cursor *sample_cursor = wl_container_of(listener, sample_cursor, destroy);
-	struct sample_state *sample = sample_cursor->sample;
-	struct sample_cursor *cursor;
-	wl_list_for_each(cursor, &sample->cursors, link) {
-		if (cursor->device == device) {
-			cursor_destroy(cursor);
-			break;
-		}
-	}
-	struct sample_pointer *pointer;
-	wl_list_for_each(pointer, &sample->pointers, link) {
-		if (pointer->device == device) {
-			free(pointer);
-			break;
-		}
-	}
-}
-
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	struct sample_state *sample = sample_output->sample;
 	wl_list_remove(&sample_output->frame.link);
@@ -161,7 +141,7 @@ void output_remove_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -193,7 +173,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	wl_list_insert(&sample->outputs, &sample_output->link);
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -209,14 +189,14 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/examples/output-layout.c b/examples/output-layout.c
index d18a83af..2a1cc320 100644
--- a/examples/output-layout.c
+++ b/examples/output-layout.c
@@ -106,7 +106,7 @@ static void animate_cat(struct sample_state *sample,
 	sample->ts_last = ts;
 }
 
-void output_frame_notify(struct wl_listener *listener, void *data) {
+static void output_frame_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *output = wl_container_of(listener, output, frame);
 	struct sample_state *sample = output->sample;
 	struct timespec ts;
@@ -145,7 +145,7 @@ static void update_velocities(struct sample_state *sample,
 	sample->y_vel += y_diff;
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	struct sample_state *sample = sample_output->sample;
 	wlr_output_layout_remove(sample->layout, sample_output->output);
@@ -154,7 +154,7 @@ void output_remove_notify(struct wl_listener *listener, void *data) {
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -171,7 +171,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	sample_output->destroy.notify = output_remove_notify;
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -207,14 +207,14 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/examples/pointer.c b/examples/pointer.c
index 4b0e6f46..5e137a1a 100644
--- a/examples/pointer.c
+++ b/examples/pointer.c
@@ -90,7 +90,7 @@ static void warp_to_touch(struct sample_state *state,
 	wlr_cursor_warp_absolute(state->cursor, dev, x, y);
 }
 
-void output_frame_notify(struct wl_listener *listener, void *data) {
+static void output_frame_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, frame);
 	struct sample_state *state = sample_output->state;
 	struct wlr_output *wlr_output = sample_output->output;
@@ -221,7 +221,7 @@ static void handle_tablet_tool_axis(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->state;
 	struct wlr_event_keyboard_key *event = data;
@@ -237,7 +237,7 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	struct sample_state *sample = sample_output->state;
 	wlr_output_layout_remove(sample->layout, sample_output->output);
@@ -246,7 +246,7 @@ void output_remove_notify(struct wl_listener *listener, void *data) {
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -268,14 +268,14 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 }
 
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *state = wl_container_of(listener, state, new_input);
 	switch (device->type) {
diff --git a/examples/rotation.c b/examples/rotation.c
index 6e10721d..3700351a 100644
--- a/examples/rotation.c
+++ b/examples/rotation.c
@@ -97,14 +97,14 @@ static void update_velocities(struct sample_state *sample,
 	}
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	wl_list_remove(&sample_output->frame.link);
 	wl_list_remove(&sample_output->destroy.link);
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -125,7 +125,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	wl_list_insert(&sample->outputs, &sample_output->link);
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -157,14 +157,14 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/examples/simple.c b/examples/simple.c
index 96f33610..bf2411c8 100644
--- a/examples/simple.c
+++ b/examples/simple.c
@@ -36,7 +36,7 @@ struct sample_keyboard {
 	struct wl_listener destroy;
 };
 
-void output_frame_notify(struct wl_listener *listener, void *data) {
+static void output_frame_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output =
 		wl_container_of(listener, sample_output, frame);
 	struct sample_state *sample = sample_output->sample;
@@ -65,7 +65,7 @@ void output_frame_notify(struct wl_listener *listener, void *data) {
 	sample->last_frame = now;
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output =
 		wl_container_of(listener, sample_output, destroy);
 	wlr_log(WLR_DEBUG, "Output removed");
@@ -74,7 +74,7 @@ void output_remove_notify(struct wl_listener *listener, void *data) {
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample =
 		wl_container_of(listener, sample, new_output);
@@ -93,7 +93,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	sample_output->destroy.notify = output_remove_notify;
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -109,7 +109,7 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard =
 		wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
@@ -117,7 +117,7 @@ void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/examples/tablet.c b/examples/tablet.c
index d437ff17..d33fb224 100644
--- a/examples/tablet.c
+++ b/examples/tablet.c
@@ -227,14 +227,14 @@ static void tablet_pad_destroy_notify(struct wl_listener *listener, void *data)
 	free(pstate);
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	wl_list_remove(&sample_output->frame.link);
 	wl_list_remove(&sample_output->destroy.link);
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -250,7 +250,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	sample_output->destroy.notify = output_remove_notify;
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -266,14 +266,14 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/examples/touch.c b/examples/touch.c
index c306ba69..07d44563 100644
--- a/examples/touch.c
+++ b/examples/touch.c
@@ -140,14 +140,14 @@ static void touch_destroy_notify(struct wl_listener *listener, void *data) {
 	free(tstate);
 }
 
-void output_remove_notify(struct wl_listener *listener, void *data) {
+static void output_remove_notify(struct wl_listener *listener, void *data) {
 	struct sample_output *sample_output = wl_container_of(listener, sample_output, destroy);
 	wl_list_remove(&sample_output->frame.link);
 	wl_list_remove(&sample_output->destroy.link);
 	free(sample_output);
 }
 
-void new_output_notify(struct wl_listener *listener, void *data) {
+static void new_output_notify(struct wl_listener *listener, void *data) {
 	struct wlr_output *output = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_output);
 	struct sample_output *sample_output = calloc(1, sizeof(struct sample_output));
@@ -163,7 +163,7 @@ void new_output_notify(struct wl_listener *listener, void *data) {
 	sample_output->destroy.notify = output_remove_notify;
 }
 
-void keyboard_key_notify(struct wl_listener *listener, void *data) {
+static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, key);
 	struct sample_state *sample = keyboard->sample;
 	struct wlr_event_keyboard_key *event = data;
@@ -179,14 +179,14 @@ void keyboard_key_notify(struct wl_listener *listener, void *data) {
 	}
 }
 
-void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
+static void keyboard_destroy_notify(struct wl_listener *listener, void *data) {
 	struct sample_keyboard *keyboard = wl_container_of(listener, keyboard, destroy);
 	wl_list_remove(&keyboard->destroy.link);
 	wl_list_remove(&keyboard->key.link);
 	free(keyboard);
 }
 
-void new_input_notify(struct wl_listener *listener, void *data) {
+static void new_input_notify(struct wl_listener *listener, void *data) {
 	struct wlr_input_device *device = data;
 	struct sample_state *sample = wl_container_of(listener, sample, new_input);
 	switch (device->type) {
diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
index 7f66f9c9..62ade510 100644
--- a/include/backend/drm/drm.h
+++ b/include/backend/drm/drm.h
@@ -151,4 +151,9 @@ bool set_drm_connector_gamma(struct wlr_output *output, size_t size,
 bool drm_connector_set_mode(struct wlr_output *output,
 	struct wlr_output_mode *mode);
 
+bool legacy_crtc_set_cursor(struct wlr_drm_backend *drm,
+	struct wlr_drm_crtc *crtc, struct gbm_bo *bo);
+bool legacy_crtc_move_cursor(struct wlr_drm_backend *drm,
+	struct wlr_drm_crtc *crtc, int x, int y);
+
 #endif
diff --git a/meson.build b/meson.build
index 7e8305b7..18528df2 100644
--- a/meson.build
+++ b/meson.build
@@ -34,6 +34,7 @@ add_project_arguments(cc.get_supported_arguments([
 	'-Wendif-labels',
 	'-Wstrict-aliasing=2',
 	'-Woverflow',
+	'-Wmissing-prototypes',
 
 	'-Wno-missing-braces',
 	'-Wno-missing-field-initializers',
diff --git a/render/gles2/texture.c b/render/gles2/texture.c
index 3aa1c005..9ff88b35 100644
--- a/render/gles2/texture.c
+++ b/render/gles2/texture.c
@@ -27,7 +27,7 @@ struct wlr_gles2_texture *gles2_get_texture(
 	return (struct wlr_gles2_texture *)wlr_texture;
 }
 
-struct wlr_gles2_texture *get_gles2_texture_in_context(
+static struct wlr_gles2_texture *get_gles2_texture_in_context(
 		struct wlr_texture *wlr_texture) {
 	struct wlr_gles2_texture *texture = gles2_get_texture(wlr_texture);
 	if (!wlr_egl_is_current(texture->egl)) {
diff --git a/render/gles2/util.c b/render/gles2/util.c
deleted file mode 100644
index 3ac777ee..00000000
--- a/render/gles2/util.c
+++ /dev/null
@@ -1,38 +0,0 @@
-#include <GLES2/gl2.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <wlr/util/log.h>
-#include "render/gles2.h"
-
-const char *gles2_strerror(GLenum err) {
-	switch (err) {
-	case GL_INVALID_ENUM:
-		return "Invalid enum";
-	case GL_INVALID_VALUE:
-		return "Invalid value";
-	case GL_INVALID_OPERATION:
-		return "Invalid operation";
-	case GL_OUT_OF_MEMORY:
-		return "Out of memory";
-	case GL_INVALID_FRAMEBUFFER_OPERATION:
-		return "Invalid framebuffer operation";
-	default:
-		return "Unknown error";
-	}
-}
-
-bool _gles2_flush_errors(const char *file, int line) {
-	GLenum err;
-	bool failure = false;
-	while ((err = glGetError()) != GL_NO_ERROR) {
-		failure = true;
-		if (err == GL_OUT_OF_MEMORY) {
-			// The OpenGL context is now undefined
-			_wlr_log(WLR_ERROR, "[%s:%d] Fatal GL error: out of memory", file, line);
-			exit(1);
-		} else {
-			_wlr_log(WLR_ERROR, "[%s:%d] GL error %d %s", file, line, err, gles2_strerror(err));
-		}
-	}
-	return failure;
-}
diff --git a/render/meson.build b/render/meson.build
index 3f6bfdca..87577aba 100644
--- a/render/meson.build
+++ b/render/meson.build
@@ -17,7 +17,6 @@ lib_wlr_render = static_library(
 		'gles2/renderer.c',
 		'gles2/shaders.c',
 		'gles2/texture.c',
-		'gles2/util.c',
 		'wlr_renderer.c',
 		'wlr_texture.c',
 	),
diff --git a/types/data_device/wlr_drag.c b/types/data_device/wlr_drag.c
index b4fe9a8a..cd8695ae 100644
--- a/types/data_device/wlr_drag.c
+++ b/types/data_device/wlr_drag.c
@@ -244,7 +244,7 @@ static const struct wlr_pointer_grab_interface
 	.cancel = drag_handle_pointer_cancel,
 };
 
-uint32_t drag_handle_touch_down(struct wlr_seat_touch_grab *grab,
+static uint32_t drag_handle_touch_down(struct wlr_seat_touch_grab *grab,
 		uint32_t time, struct wlr_touch_point *point) {
 	// eat the event
 	return 0;
diff --git a/types/wlr_foreign_toplevel_management_v1.c b/types/wlr_foreign_toplevel_management_v1.c
index 6aed5eeb..6d256077 100644
--- a/types/wlr_foreign_toplevel_management_v1.c
+++ b/types/wlr_foreign_toplevel_management_v1.c
@@ -35,12 +35,12 @@ static void toplevel_handle_send_maximized_event(struct wl_resource *resource,
 	wlr_signal_emit_safe(&toplevel->events.request_maximize, &event);
 }
 
-void foreign_toplevel_handle_set_maximized(struct wl_client *client,
+static void foreign_toplevel_handle_set_maximized(struct wl_client *client,
 		struct wl_resource *resource) {
 	toplevel_handle_send_maximized_event(resource, true);
 }
 
-void foreign_toplevel_handle_unset_maximized(struct wl_client *client,
+static void foreign_toplevel_handle_unset_maximized(struct wl_client *client,
 		struct wl_resource *resource) {
 	toplevel_handle_send_maximized_event(resource, false);
 }
diff --git a/types/wlr_output_layout.c b/types/wlr_output_layout.c
index 64999fec..498bdf7b 100644
--- a/types/wlr_output_layout.c
+++ b/types/wlr_output_layout.c
@@ -452,7 +452,7 @@ enum distance_selection_method {
 	FARTHEST
 };
 
-struct wlr_output *wlr_output_layout_output_in_direction(
+static struct wlr_output *wlr_output_layout_output_in_direction(
 		struct wlr_output_layout *layout, enum wlr_direction direction,
 		struct wlr_output *reference, double ref_lx, double ref_ly,
 		enum distance_selection_method distance_method) {
diff --git a/types/wlr_screencopy_v1.c b/types/wlr_screencopy_v1.c
index 92caa15d..0ad93fa4 100644
--- a/types/wlr_screencopy_v1.c
+++ b/types/wlr_screencopy_v1.c
@@ -477,7 +477,7 @@ static const struct zwlr_screencopy_manager_v1_interface manager_impl = {
 	.destroy = manager_handle_destroy,
 };
 
-void manager_handle_resource_destroy(struct wl_resource *resource) {
+static void manager_handle_resource_destroy(struct wl_resource *resource) {
 	struct wlr_screencopy_v1_client *client =
 		client_from_resource(resource);
 	client_unref(client);
diff --git a/types/wlr_server_decoration.c b/types/wlr_server_decoration.c
index fd92fd04..5a2d2ef5 100644
--- a/types/wlr_server_decoration.c
+++ b/types/wlr_server_decoration.c
@@ -138,7 +138,8 @@ void wlr_server_decoration_manager_set_default_mode(
 	}
 }
 
-void server_decoration_manager_destroy_resource(struct wl_resource *resource) {
+static void server_decoration_manager_destroy_resource(
+		struct wl_resource *resource) {
 	wl_list_remove(wl_resource_get_link(resource));
 }
 
diff --git a/types/wlr_xdg_decoration_v1.c b/types/wlr_xdg_decoration_v1.c
index 607b75e4..4b5fa61c 100644
--- a/types/wlr_xdg_decoration_v1.c
+++ b/types/wlr_xdg_decoration_v1.c
@@ -238,7 +238,8 @@ static const struct zxdg_decoration_manager_v1_interface
 	.get_toplevel_decoration = decoration_manager_handle_get_toplevel_decoration,
 };
 
-void decoration_manager_handle_resource_destroy(struct wl_resource *resource) {
+static void decoration_manager_handle_resource_destroy(
+		struct wl_resource *resource) {
 	wl_list_remove(wl_resource_get_link(resource));
 }