headers: make more headers self-contained

Some IDEs parse headers in isolation to populate their code model. This
exposes some missing headers, mainly for alsa internal struct
definitions, ssize_t (requiring sys/types.h), size_t (requiring
string.h), va_args (requiring stdargs.h) or FILE (requiring stdio.h)

This patch makes the main headers parsable by qtcreator

include/conf.h

@@ -28,6 +28,11 @@
 #ifndef __ALSA_CONF_H
 #define __ALSA_CONF_H
 
+#include <stddef.h>
+
+#include <alsa/input.h>
+#include <alsa/output.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/control.h

@@ -28,6 +28,10 @@
 #ifndef __ALSA_CONTROL_H
 #define __ALSA_CONTROL_H
 
+#include <stddef.h>
+
+#include <alsa/conf.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

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 <string.h>
+#include <sys/types.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/input.h

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

include/mixer.h

@@ -28,6 +28,11 @@
 #ifndef __ALSA_MIXER_H
 #define __ALSA_MIXER_H
 
+#include <alsa/control.h>
+#include <alsa/pcm.h>
+
+#include <string.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/output.h

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

include/pcm.h

@@ -34,6 +34,10 @@ extern "C" {
 #endif
 
 #include <stdint.h>
+#include <string.h>
+
+#include <alsa/global.h>
+#include <alsa/output.h>
 
 /**
  *  \defgroup PCM PCM Interface

include/pcm_rate.h

@@ -31,6 +31,10 @@
 #ifndef __ALSA_PCM_RATE_H
 #define __ALSA_PCM_RATE_H
 
+#include <alsa/conf.h>
+#include <alsa/output.h>
+#include <alsa/pcm.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/rawmidi.h

@@ -28,6 +28,13 @@
 #ifndef __ALSA_RAWMIDI_H
 #define __ALSA_RAWMIDI_H
 
+#include <string.h>
+
+#include <sys/types.h>
+
+#include <alsa/conf.h>
+#include <alsa/global.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/seq.h

@@ -31,6 +31,9 @@
 
 #include "ump.h"
 
+#include <alsa/seq_event.h>
+#include <alsa/timer.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/timer.h

@@ -28,6 +28,13 @@
 #ifndef __ALSA_TIMER_H
 #define __ALSA_TIMER_H
 
+#include <string.h>
+
+#include <sys/types.h>
+
+#include <alsa/conf.h>
+#include <alsa/global.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif

include/topology.h

@@ -22,6 +22,7 @@
 #define __ALSA_TOPOLOGY_H
 
 #include <stdint.h>
+#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {

include/ump_msg.h

@@ -10,6 +10,7 @@
 #define __ALSA_UMP_MSG_H
 
 #include <stdint.h>
+#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {