headers: make headers self-contained

each header should include the dependency headers in order to make the
headers self-contained.
this is allows clangd based IDEs to parse the headers and populate the
code model correctly

include/conf.h

@@ -28,6 +28,9 @@
 #ifndef __ALSA_CONF_H
 #define __ALSA_CONF_H
 
+#include "input.h"
+#include "output.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/control.h

@@ -28,6 +28,11 @@
 #ifndef __ALSA_CONTROL_H
 #define __ALSA_CONTROL_H
 
+#include <stddef.h>
+#include <unistd.h>
+#include "conf.h"
+#include "global.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/control_plugin.h

@@ -31,6 +31,8 @@
 #ifndef __ALSA_CONTROL_PLUGIN_H
 #define __ALSA_CONTROL_PLUGIN_H
 
+#include "control.h"
+
 /**
  * \defgroup Control_Plugins Primitive Control Plugins
  * \ingroup Control

include/error.h

@@ -28,6 +28,8 @@
 #ifndef __ALSA_ERROR_H
 #define __ALSA_ERROR_H
 
+#include <stdarg.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/hwdep.h

@@ -28,6 +28,9 @@
 #ifndef __ALSA_HWDEP_H
 #define __ALSA_HWDEP_H
 
+#include <stddef.h>
+#include <unistd.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/input.h

@@ -29,6 +29,8 @@
 #define __ALSA_INPUT_H
 
 #include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
 
 #ifdef __cplusplus
 extern "C" {

include/mixer.h

@@ -28,6 +28,9 @@
 #ifndef __ALSA_MIXER_H
 #define __ALSA_MIXER_H
 
+#include "control.h"
+#include "pcm.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/mixer_abst.h

@@ -26,6 +26,8 @@
 #ifndef __ALSA_MIXER_ABST_H
 #define __ALSA_MIXER_ABST_H
 
+#include "mixer.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/output.h

@@ -29,6 +29,7 @@
 #define __ALSA_OUTPUT_H
 
 #include <stdarg.h>
+#include <stdio.h>
 
 #ifdef __cplusplus
 extern "C" {

include/pcm.h

@@ -29,6 +29,9 @@
 #ifndef __ALSA_PCM_H
 #define __ALSA_PCM_H
 
+#include "conf.h"
+#include "global.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/pcm_ioplug.h

@@ -31,6 +31,8 @@
 #ifndef __ALSA_PCM_IOPLUG_H
 #define __ALSA_PCM_IOPLUG_H
 
+#include "pcm.h"
+
 /**
  * \defgroup PCM_IOPlug External I/O plugin SDK
  * \ingroup Plugin_SDK

include/pcm_plugin.h

@@ -32,6 +32,8 @@
 #ifndef __ALSA_PCM_PLUGIN_H
 #define __ALSA_PCM_PLUGIN_H
 
+#include "pcm.h"
+
 /**
  * \defgroup PCM_Plugins PCM Plugins
  * \ingroup PCM

include/pcm_rate.h

@@ -31,6 +31,8 @@
 #ifndef __ALSA_PCM_RATE_H
 #define __ALSA_PCM_RATE_H
 
+#include "pcm.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/rawmidi.h

@@ -28,6 +28,9 @@
 #ifndef __ALSA_RAWMIDI_H
 #define __ALSA_RAWMIDI_H
 
+#include "conf.h"
+#include "global.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/seq.h

@@ -29,6 +29,12 @@
 #ifndef __ALSA_SEQ_H
 #define __ALSA_SEQ_H
 
+#include <stddef.h>
+#include <unistd.h>
+#include "conf.h"
+#include "seq_event.h"
+#include "timer.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/seq_midi_event.h

@@ -28,6 +28,9 @@
 #ifndef __ALSA_SEQ_MIDI_EVENT_H
 #define __ALSA_SEQ_MIDI_EVENT_H
 
+#include <stddef.h>
+#include "seq_event.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/timer.h

@@ -28,6 +28,8 @@
 #ifndef __ALSA_TIMER_H
 #define __ALSA_TIMER_H
 
+#include "conf.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/topology.h

@@ -21,6 +21,7 @@
 #ifndef __ALSA_TOPOLOGY_H
 #define __ALSA_TOPOLOGY_H
 
+#include <stddef.h>
 #include <stdint.h>
 
 #ifdef __cplusplus