Add gfortran support for AMD GCN

From: Kwok Cheung Yeung <kcy@codesourcery.com>

This patch adds enough support for constructors/destructors and OS functions
to be able to link and run gfortran programs on AMD GCN.

There's no actual ability to do I/O operations on this targets, besides
"write" to stdout and stderr, so most of the functions are just stubs.

1 files changed, 23 insertions, 0 deletions

diff --git a/newlib/libc/sys/amdgcn/unlink.c b/newlib/libc/sys/amdgcn/unlink.c
new file mode 100644
index 000000000..059c1d57c
--- /dev/null
+++ b/newlib/libc/sys/amdgcn/unlink.c
@@ -0,0 +1,23 @@
+/*
+ * Support file for amdgcn in newlib.
+ * Copyright (c) 2019 Mentor Graphics.
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include <errno.h>
+
+int
+unlink (const char *file)
+{
+  errno = EACCES;
+  return -1;
+}