add libc building to agbcc.

libc/stdio/printf.c

@@ -0,0 +1,83 @@
+
+#include <_ansi.h>
+#include <stdio.h>
+
+#ifdef _HAVE_STDC
+
+#include <stdarg.h>
+
+int
+_printf_r (struct _reent *ptr, const char *fmt, ...)
+{
+  int ret;
+  va_list ap;
+
+  va_start (ap, fmt);
+  ret = _vfprintf_r (ptr, _stdout_r (ptr), fmt, ap);
+  va_end (ap);
+  return ret;
+}
+
+#else
+
+#include <varargs.h>
+
+int
+_printf_r (ptr, fmt, va_alist)
+     struct _reent *ptr;
+     char *fmt;
+     va_dcl
+{
+  int ret;
+  va_list ap;
+
+  va_start (ap);
+  ret = _vfprintf_r (ptr, _stdout_r (ptr), fmt, ap);
+  va_end (ap);
+  return ret;
+}
+
+#endif
+
+
+#ifndef _REENT_ONLY
+
+#ifdef _HAVE_STDC
+
+#include <stdarg.h>
+
+int
+printf (const char *fmt, ...)
+{
+  int ret;
+  va_list ap;
+
+  va_start (ap, fmt);
+  _stdout_r (_REENT)->_data = _REENT;
+  ret = vfprintf (_stdout_r (_REENT), fmt, ap);
+  va_end (ap);
+  return ret;
+}
+
+#else
+
+#include <varargs.h>
+
+int
+printf (fmt, va_alist)
+     char *fmt;
+     va_dcl
+{
+  int ret;
+  va_list ap;
+
+  va_start (ap);
+  _stdout_r (_REENT)->_data = _REENT;
+  ret = vfprintf (_stdout_r (_REENT), fmt, ap);
+  va_end (ap);
+  return ret;
+}
+
+#endif /* ! _HAVE_STDC */
+
+#endif /* ! _REENT_ONLY */