Add prototypes for CheckMagic, IsArchive, and IsBytecode.

[oota-llvm.git] / include / Support / hash_set

diff --git a/include/Support/hash_set b/include/Support/hash_set
index 5eb3f24c347de76d3e29120d9cf79874dadb9a93..fa68a8bb738b4f4c3b437bddef0e9e6e3e7b57b8 100644 (file)
--- a/include/Support/hash_set
+++ b/include/Support/hash_set
@@ -1,4 +1,12 @@
 //===-- Support/hash_set - "Portable" wrapper around hash_set ---*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+// vim:ft=cpp
 //
 // This file provides a wrapper around the mysterious <hash_set> header file
 // that seems to move around between GCC releases into and out of namespaces at
@@ -7,8 +15,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef SUPPORT_HASHSET_H
-#define SUPPORT_HASHSET_H
+#ifndef SUPPORT_HASH_SET
+#define SUPPORT_HASH_SET
 
 // Compiler Support Matrix
 //
@@ -17,27 +25,45 @@
 //  3.0.4       std      ext/hash_set
 //  3.1      __gnu_cxx   ext/hash_set
 //
-#if __GNUC__==3
-#include <ext/hash_set>
 
-#ifndef HASH_NAMESPACE
-#if __GNUC_MINOR__ == 0
-#define HASH_NAMESPACE std
-#else
-#define HASH_NAMESPACE __gnu_cxx
-#endif
-#endif
+#include "Config/config.h"
 
-#else
+// GCC versions 3.1 and later put hash_set in <ext/hash_set> and in
+// the __gnu_cxx namespace.
+#if defined(HAVE_GNU_EXT_HASH_SET)
+# include <ext/hash_set>
+# ifndef HASH_NAMESPACE
+#  define HASH_NAMESPACE __gnu_cxx
+# endif
 
-#include <hash_set>
-#ifndef HASH_NAMESPACE
-#define HASH_NAMESPACE std
-#endif
+// GCC 3.0.x puts hash_set in <ext/hash_set> and in the std namespace.
+#elif defined(HAVE_STD_EXT_HASH_SET)
+# include <ext/hash_set>
+# ifndef HASH_NAMESPACE
+#  define HASH_NAMESPACE std
+# endif
+
+// Older compilers such as GCC before version 3.0 do not keep
+// extensions in the `ext' directory, and ignore the `std' namespace.
+#elif defined(HAVE_GLOBAL_HASH_SET)
+# include <hash_set>
+# ifndef HASH_NAMESPACE
+#  define HASH_NAMESPACE std
+# endif
+
+// Give a warning if we couldn't find it, instead of (or in addition to)
+// randomly doing something dumb.
+#else
+# warning "Autoconfiguration failed to find the hash_set header file."
 #endif
 
 using HASH_NAMESPACE::hash_set;
 using HASH_NAMESPACE::hash;
 
-#endif
+// Include vector because ext/hash_set includes stl_vector.h and leaves
+// out specializations like stl_bvector.h, causing link conflicts.
+#include <vector>
+
+#include <Support/HashExtras.h>
 
+#endif