rpicamsrc: fix and silence some compiler warnings

Some are in system headers, and in Raspi files we want
to keep modifications to a minimum.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/667>

4 files changed, 17 insertions, 4 deletions

diff --git a/sys/rpicamsrc/RaspiCapture.c b/sys/rpicamsrc/RaspiCapture.c
index 975078f29..446700c25 100644
--- a/sys/rpicamsrc/RaspiCapture.c
+++ b/sys/rpicamsrc/RaspiCapture.c
@@ -1627,7 +1627,7 @@ static void check_disable_port(MMAL_PORT_T *port)
       mmal_port_disable(port);
 }
 
-void raspicapture_init()
+void raspicapture_init(void)
 {
    bcm_host_init();
 
diff --git a/sys/rpicamsrc/RaspiCapture.h b/sys/rpicamsrc/RaspiCapture.h
index 71e79b26e..d426fed90 100644
--- a/sys/rpicamsrc/RaspiCapture.h
+++ b/sys/rpicamsrc/RaspiCapture.h
@@ -126,7 +126,7 @@ typedef struct
 
 typedef struct RASPIVID_STATE_T RASPIVID_STATE;
 
-void raspicapture_init();
+void raspicapture_init(void);
 void raspicapture_default_config(RASPIVID_CONFIG *config);
 RASPIVID_STATE *raspi_capture_setup(RASPIVID_CONFIG *config);
 gboolean raspi_capture_start(RASPIVID_STATE *state);
diff --git a/sys/rpicamsrc/gstrpicamsrc.c b/sys/rpicamsrc/gstrpicamsrc.c
index eb57f25d5..3249337da 100644
--- a/sys/rpicamsrc/gstrpicamsrc.c
+++ b/sys/rpicamsrc/gstrpicamsrc.c
@@ -246,7 +246,9 @@ G_DEFINE_TYPE_WITH_CODE (GstRpiCamSrc, gst_rpi_cam_src,
 
 #define C_ENUM(v) ((gint) v)
 
-GType
+static GType gst_rpi_cam_src_sensor_mode_get_type (void);
+
+static GType
 gst_rpi_cam_src_sensor_mode_get_type (void)
 {
   static const GEnumValue values[] = {
diff --git a/sys/rpicamsrc/meson.build b/sys/rpicamsrc/meson.build
index a71be6f86..2cc9e7c5c 100644
--- a/sys/rpicamsrc/meson.build
+++ b/sys/rpicamsrc/meson.build
@@ -49,6 +49,17 @@ foreach rpi_lib : ['mmal_core', 'mmal_util', 'mmal_vc_client', 'vcos', 'bcm_host
   mmal_deps += [l]
 endforeach
 
+rpi_warn_flags = cc.get_supported_arguments([
+  # vcos/mmal headers
+  '-Wno-redundant-decls',
+  # RaspiCapture.c + RaspiCamControl.c
+  '-Wno-discarded-qualifiers',
+  '-Wno-declaration-after-statement',
+  '-Wno-missing-prototypes',
+  '-Wno-missing-declarations',
+  '-Wno-stringop-truncation',
+])
+
 gnome = import('gnome')
 
 enums = gnome.mkenums_simple('gstrpicam-enum-types',
@@ -59,7 +70,7 @@ enums = gnome.mkenums_simple('gstrpicam-enum-types',
 # we might need '-Wl,--no-as-needed' or b_asneeded=false on ubuntu, tbd
 gstrpicamsrc = library('gstrpicamsrc',
   rpicamsrc_sources, enums,
-  c_args: [gst_plugins_good_args, rpi_inc_args],
+  c_args: [gst_plugins_good_args, rpi_inc_args, rpi_warn_flags],
   include_directories: [configinc, libsinc],
   dependencies: [gst_dep, gstbase_dep, gstvideo_dep] + mmal_deps,
   install_dir: plugins_install_dir,