removed stddef.h and limits.h (come with the compiler header files)

added a stub stdint.h (only sometimes comes with the compiler)
added a guide on cross compiling
adapted to cross compilation, for now tcc works

22 files changed, 34 insertions, 39 deletions

diff --git a/src/README b/src/README
index 7b1b51c..a1c75e4 100644
--- a/src/README
+++ b/src/README
@@ -65,10 +65,6 @@ libc
 
 Stub C library implementation.
 
-C library definitions
-* stddef.h - definition of NULL, size_t
-* limits.h - domain range constants like INT_MAX
-
 C library routines
 * string.c - string, memory functions
 * stdlib.c - UNIX standard library functions
diff --git a/src/drivers/video/vga.h b/src/drivers/video/vga.h
index 0947856..9a637a2 100644
--- a/src/drivers/video/vga.h
+++ b/src/drivers/video/vga.h
@@ -4,7 +4,7 @@
 #include <stdbool.h>
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 #include "interrupts.h"
 #include "port.h"
diff --git a/src/gui/composite_widget.c b/src/gui/composite_widget.c
index 743360f..07056c0 100644
--- a/src/gui/composite_widget.c
+++ b/src/gui/composite_widget.c
@@ -1,7 +1,7 @@
 #include "composite_widget.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 static composite_widget_vtable_t const composite_widget_vtable = {
 	{
diff --git a/src/gui/desktop.c b/src/gui/desktop.c
index 98fb900..9851b78 100644
--- a/src/gui/desktop.c
+++ b/src/gui/desktop.c
@@ -1,7 +1,7 @@
 #include "desktop.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 static desktop_vtable_t const desktop_vtable = {
 	{
diff --git a/src/gui/text_widget.c b/src/gui/text_widget.c
index 49c1be7..5e468c7 100644
--- a/src/gui/text_widget.c
+++ b/src/gui/text_widget.c
@@ -1,7 +1,7 @@
 #include "text_widget.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 static text_widget_vtable_t const text_widget_vtable = {
 	{
diff --git a/src/gui/widget.c b/src/gui/widget.c
index 3620761..58b03ef 100644
--- a/src/gui/widget.c
+++ b/src/gui/widget.c
@@ -1,7 +1,7 @@
 #include "widget.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 static widget_vtable_t const widget_vtable = {
 	widget_draw,
diff --git a/src/gui/window.c b/src/gui/window.c
index 80c0b6c..fd53920 100644
--- a/src/gui/window.c
+++ b/src/gui/window.c
@@ -1,7 +1,7 @@
 #include "window.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 static window_vtable_t const window_vtable = {
 	{
diff --git a/src/hardware/interrupts.h b/src/hardware/interrupts.h
index c325d4f..64040cb 100644
--- a/src/hardware/interrupts.h
+++ b/src/hardware/interrupts.h
@@ -1,7 +1,7 @@
 #ifndef INTERRUPTS_H
 #define INTERRUPTS_H
 
-#include <stdint.h>
+#include "stdint.h"
 
 #include "port.h"
 #include "tasks.h"
diff --git a/src/hardware/port.h b/src/hardware/port.h
index ec96d09..8203fea 100644
--- a/src/hardware/port.h
+++ b/src/hardware/port.h
@@ -1,7 +1,7 @@
 #ifndef PORT_H
 #define PORT_H
 
-#include <stdint.h>
+#include "stdint.h"
 
 typedef struct {
 	uint16_t number; // port number, e.g. 0x3d4 VGA index register
diff --git a/src/kernel/console.c b/src/kernel/console.c
index 8caefc8..04fb44f 100644
--- a/src/kernel/console.c
+++ b/src/kernel/console.c
@@ -1,7 +1,7 @@
 #include "console.h"
 
 #include "string.h"
-#include "stddef.h"
+#include <stddef.h>
 
 void console_init( console_t *console )
 {
diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c
index 3be8758..a472cde 100644
--- a/src/kernel/kernel.c
+++ b/src/kernel/kernel.c
@@ -1,5 +1,5 @@
 #include <stdbool.h>
-#include <stdint.h>
+#include "stdint.h"
 #include <stdarg.h>
 
 #include "vgatext.h"
diff --git a/src/kernel/memorymanagement.h b/src/kernel/memorymanagement.h
index 647c05d..299fa4c 100644
--- a/src/kernel/memorymanagement.h
+++ b/src/kernel/memorymanagement.h
@@ -1,7 +1,8 @@
 #ifndef MEMORYMANAGEMENT_H
 #define MEMORYMANAGEMENT_H
 
-#include "stddef.h"
+#include <stddef.h>
+#include "stdint.h"
 
 typedef struct {
 	size_t offset;
diff --git a/src/kernel/tasks.h b/src/kernel/tasks.h
index dddf9bb..b982d13 100644
--- a/src/kernel/tasks.h
+++ b/src/kernel/tasks.h
@@ -1,7 +1,7 @@
 #ifndef TASKS_H
 #define TASKS_H
 
-#include <stdint.h>
+#include "stdint.h"
 
 #define TASK_STACK_SIZE 4096
 
diff --git a/src/libc/limits.h b/src/libc/limits.h
deleted file mode 100644
index 1fc4e37..0000000
--- a/src/libc/limits.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef LIMITS_H
-#define LIMITS_H
-
-#define INT_MAX 2147483647
-#define INT_MIN -2147483648
-
-#endif // LIMITS_H
diff --git a/src/libc/setjmp.h b/src/libc/setjmp.h
index 5f987f1..4322124 100644
--- a/src/libc/setjmp.h
+++ b/src/libc/setjmp.h
@@ -1,7 +1,7 @@
 #ifndef SETJMP_H
 #define SETJMP_H
 
-#include <stdint.h>
+#include "stdint.h"
 
 // C99 states this should be an array so we can address it without
 // the & operator, see prototypes of setjmp and longjmp
diff --git a/src/libc/stddef.h b/src/libc/stddef.h
deleted file mode 100644
index 4333661..0000000
--- a/src/libc/stddef.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef STDDEF_H
-#define STDDEF_H
-
-#include <stdint.h>
-
-#define NULL ( (void *)0 )
-
-typedef uint32_t size_t;
-
-#endif /* STDDEF_H */
diff --git a/src/libc/stdint.h b/src/libc/stdint.h
new file mode 100644
index 0000000..e0f35b6
--- /dev/null
+++ b/src/libc/stdint.h
@@ -0,0 +1,15 @@
+#ifndef STDINT_H
+#define STDINT_H
+
+#if defined( __PCC__ ) || defined( __TINYC__ )
+// TODO: no stdint.h in pcc-libs/pcc or tcc, mock one, but this one is
+// most likely very incorrect
+typedef unsigned int uint32_t;
+typedef signed int int32_t;
+typedef unsigned short uint16_t;
+typedef signed short int16_t;
+typedef unsigned char uint8_t;
+typedef signed char int8_t;
+#endif
+
+#endif // STDINT_H
diff --git a/src/libc/stdio.c b/src/libc/stdio.c
index 631cfbb..87b70ef 100644
--- a/src/libc/stdio.c
+++ b/src/libc/stdio.c
@@ -1,5 +1,5 @@
 #include "stdio.h"
-#include "stddef.h"
+#include <stddef.h>
 #include "stdlib.h"
 #include "string.h"
 
diff --git a/src/libc/stdio.h b/src/libc/stdio.h
index 33d7946..58c80b1 100644
--- a/src/libc/stdio.h
+++ b/src/libc/stdio.h
@@ -3,7 +3,7 @@
 
 #include <stdarg.h>
 
-#include "stddef.h"
+#include <stddef.h>
 
 #ifdef OS_ABAOS
 #include "console.h"
diff --git a/src/libc/stdlib.c b/src/libc/stdlib.c
index 07eabd4..4fea56e 100644
--- a/src/libc/stdlib.c
+++ b/src/libc/stdlib.c
@@ -1,7 +1,7 @@
 #include <stdbool.h>
 #include "string.h"
 #include "stdlib.h"
-#include "stddef.h"
+#include <stddef.h>
 
 #include "kernel.h"
 
diff --git a/src/libc/stdlib.h b/src/libc/stdlib.h
index 5b2521f..f7cfc8c 100644
--- a/src/libc/stdlib.h
+++ b/src/libc/stdlib.h
@@ -1,7 +1,7 @@
 #ifndef STDLIB_H
 #define STDLIB_H
 
-#include "stddef.h"
+#include <stddef.h>
 
 #include "memorymanagement.h"
 
diff --git a/src/libc/string.h b/src/libc/string.h
index 6c0fa01..f078d48 100644
--- a/src/libc/string.h
+++ b/src/libc/string.h
@@ -1,7 +1,7 @@
 #ifndef STRING_H
 #define STRING_H
 
-#include "stddef.h"
+#include <stddef.h>
 
 void *memset( void *s, int c, size_t n );
 void *memmove( void *d, const void *s, size_t n );