Initial check-in of gcc 4.7.2.

Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365

1 files changed, 66 insertions, 0 deletions

diff --git a/gcc-4.7/libgo/runtime/go-setenv.c b/gcc-4.7/libgo/runtime/go-setenv.c
new file mode 100644
index 000000000..789ffdf49
--- /dev/null
+++ b/gcc-4.7/libgo/runtime/go-setenv.c
@@ -0,0 +1,66 @@
+/* go-setenv.c -- set the C environment from Go.
+
+   Copyright 2011 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "go-alloc.h"
+#include "go-string.h"
+
+/* Set the C environment from Go.  This is called by syscall.Setenv.  */
+
+void setenv_c (struct __go_string, struct __go_string)
+  __asm__ ("syscall.setenv_c");
+
+void
+setenv_c (struct __go_string k, struct __go_string v)
+{
+  const unsigned char *ks;
+  unsigned char *kn;
+  const unsigned char *vs;
+  unsigned char *vn;
+
+  ks = k.__data;
+  kn = NULL;
+  vs = v.__data;
+  vn = NULL;
+
+#ifdef HAVE_SETENV
+
+  if (ks[k.__length] != 0)
+    {
+      kn = __go_alloc (k.__length + 1);
+      __builtin_memcpy (kn, ks, k.__length);
+      ks = kn;
+    }
+
+  if (vs[v.__length] != 0)
+    {
+      vn = __go_alloc (v.__length + 1);
+      __builtin_memcpy (vn, vs, v.__length);
+      vs = vn;
+    }
+
+  setenv ((const char *) ks, (const char *) vs, 1);
+
+#else /* !defined(HAVE_SETENV) */
+
+  kn = __go_alloc (k.__length + v.__length + 2);
+  __builtin_memcpy (kn, ks, k.__length);
+  kn[k.__length] = '=';
+  __builtin_memcpy (kn + k.__length + 1, vs, v.__length);
+  kn[k.__length + v.__length + 1] = '\0';
+  putenv ((char *) kn);
+
+#endif /* !defined(HAVE_SETENV) */
+
+  if (kn != NULL)
+    __go_free (kn);
+  if (vn != NULL)
+    __go_free (vn);
+}