aboutsummaryrefslogtreecommitdiffstats
path: root/include/llvm/System/IncludeFile.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/llvm/System/IncludeFile.h')
-rw-r--r--include/llvm/System/IncludeFile.h79
1 files changed, 0 insertions, 79 deletions
diff --git a/include/llvm/System/IncludeFile.h b/include/llvm/System/IncludeFile.h
deleted file mode 100644
index 3268ea2..0000000
--- a/include/llvm/System/IncludeFile.h
+++ /dev/null
@@ -1,79 +0,0 @@
-//===- llvm/System/IncludeFile.h - Ensure Linking Of Library ---*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the FORCE_DEFINING_FILE_TO_BE_LINKED and DEFINE_FILE_FOR
-// macros.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_SYSTEM_INCLUDEFILE_H
-#define LLVM_SYSTEM_INCLUDEFILE_H
-
-/// This macro is the public interface that IncludeFile.h exports. This gives
-/// us the option to implement the "link the definition" capability in any
-/// manner that we choose. All header files that depend on a specific .cpp
-/// file being linked at run time should use this macro instead of the
-/// IncludeFile class directly.
-///
-/// For example, foo.h would use:<br/>
-/// <tt>FORCE_DEFINING_FILE_TO_BE_LINKED(foo)</tt><br/>
-///
-/// And, foo.cp would use:<br/>
-/// <tt>DEFINING_FILE_FOR(foo)</tt><br/>
-#ifdef __GNUC__
-// If the `used' attribute is available, use it to create a variable
-// with an initializer that will force the linking of the defining file.
-#define FORCE_DEFINING_FILE_TO_BE_LINKED(name) \
- namespace llvm { \
- extern const char name ## LinkVar; \
- __attribute__((used)) static const char *const name ## LinkObj = \
- &name ## LinkVar; \
- }
-#else
-// Otherwise use a constructor call.
-#define FORCE_DEFINING_FILE_TO_BE_LINKED(name) \
- namespace llvm { \
- extern const char name ## LinkVar; \
- static const IncludeFile name ## LinkObj ( &name ## LinkVar ); \
- }
-#endif
-
-/// This macro is the counterpart to FORCE_DEFINING_FILE_TO_BE_LINKED. It should
-/// be used in a .cpp file to define the name referenced in a header file that
-/// will cause linkage of the .cpp file. It should only be used at extern level.
-#define DEFINING_FILE_FOR(name) \
- namespace llvm { const char name ## LinkVar = 0; }
-
-namespace llvm {
-
-/// This class is used in the implementation of FORCE_DEFINING_FILE_TO_BE_LINKED
-/// macro to make sure that the implementation of a header file is included
-/// into a tool that uses the header. This is solely
-/// to overcome problems linking .a files and not getting the implementation
-/// of compilation units we need. This is commonly an issue with the various
-/// Passes but also occurs elsewhere in LLVM. We like to use .a files because
-/// they link faster and provide the smallest executables. However, sometimes
-/// those executables are too small, if the program doesn't reference something
-/// that might be needed, especially by a loaded share object. This little class
-/// helps to resolve that problem. The basic strategy is to use this class in
-/// a header file and pass the address of a variable to the constructor. If the
-/// variable is defined in the header file's corresponding .cpp file then all
-/// tools/libraries that \#include the header file will require the .cpp as
-/// well.
-/// For example:<br/>
-/// <tt>extern int LinkMyCodeStub;</tt><br/>
-/// <tt>static IncludeFile LinkMyModule(&LinkMyCodeStub);</tt><br/>
-/// @brief Class to ensure linking of corresponding object file.
-struct IncludeFile {
- explicit IncludeFile(const void *);
-};
-
-}
-
-#endif