add libc building to agbcc.

1 files changed, 16 insertions, 0 deletions

diff --git a/libc/errno/errno.c b/libc/errno/errno.c
new file mode 100644
index 0000000..fd1743d
--- /dev/null
+++ b/libc/errno/errno.c
@@ -0,0 +1,16 @@
+/* The errno variable is stored in the reentrancy structure.  This
+   function returns its address for use by the macro errno defined in
+   errno.h.  */
+
+#include <errno.h>
+#include <reent.h>
+
+#ifndef _REENT_ONLY
+
+int *
+__errno ()
+{
+  return &_REENT->_errno;
+}
+
+#endif