Making the compiler a bitch by enabling warnings in full, fixing a few warnings, and making the board actually do slightly something.

5 files changed, 6 insertions, 0 deletions

diff --git a/os/src/close.c b/os/src/close.c
index 46ee8c5..ae0716f 100644
--- a/os/src/close.c
+++ b/os/src/close.c
@@ -1,4 +1,5 @@
 #include <reent.h>
 
 int _close_r(struct _reent * reent, int fd) {
+    return 0;
 }
diff --git a/os/src/free.c b/os/src/free.c
index f2d1fe5..d80aff2 100644
--- a/os/src/free.c
+++ b/os/src/free.c
@@ -1,4 +1,5 @@
 #include <reent.h>
+#include <malloc.h>
 
 void free(void * ptr) {
     _free_r(_impure_ptr, ptr);
diff --git a/os/src/lseek.c b/os/src/lseek.c
index 1b86dbb..f132693 100644
--- a/os/src/lseek.c
+++ b/os/src/lseek.c
@@ -1,4 +1,5 @@
 #include <reent.h>
 
 _off_t _lseek_r(struct _reent * reent, int fd, _off_t seek, int wheel) {
+    return 0;
 }
diff --git a/os/src/sprintf.c b/os/src/sprintf.c
index 76ea9a2..30d27b3 100644
--- a/os/src/sprintf.c
+++ b/os/src/sprintf.c
@@ -1,4 +1,5 @@
 #include <reent.h>
+#include <stdio.h>
 #include <stdarg.h>
 
 int sprintf(char * str, const char * fmt, ...) {
@@ -7,4 +8,5 @@ int sprintf(char * str, const char * fmt, ...) {
     va_start(ap, fmt);
     r = _vsprintf_r(_impure_ptr, str, fmt, ap);
     va_end(ap);
+    return r;
 }
diff --git a/os/src/write.c b/os/src/write.c
index a1bf474..a54195f 100644
--- a/os/src/write.c
+++ b/os/src/write.c
@@ -1,4 +1,5 @@
 #include <reent.h>
 
 _ssize_t _write_r(struct _reent * reent, int fd, const void * buf, size_t size) {
+    return 0;
 }