// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
-//
-// This file defines the interface to the module/file/archive linker.
-//
-//===----------------------------------------------------------------------===//
#ifndef LLVM_LINKER_H
#define LLVM_LINKER_H
#include <vector>
namespace llvm {
- namespace sys { class Path; }
class Module;
class LLVMContext;
/// In this case the Linker still retains ownership of the Module. If the
/// releaseModule() method is used, the ownership of the Module is transferred
/// to the caller and the Linker object is only suitable for destruction.
-/// The Linker can link Modules from memory, bitcode files, or bitcode
-/// archives. It retains a set of search paths in which to find any libraries
-/// presented to it. By default, the linker will generate error and warning
-/// messages to stderr but this capability can be turned off with the
-/// QuietWarnings and QuietErrors flags. It can also be instructed to verbosely
-/// print out the linking actions it is taking with the Verbose flag.
+/// The Linker can link Modules from memory. By default, the linker
+/// will generate error and warning messages to stderr but this capability can
+/// be turned off with the QuietWarnings and QuietErrors flags. It can also be
+/// instructed to verbosely print out the linking actions it is taking with
+/// the Verbose flag.
/// @brief The LLVM Linker.
class Linker {
/// @name Types
/// @{
public:
- /// This type is used to pass the linkage items (libraries and files) to
- /// the LinkItems function. It is composed of string/bool pairs. The string
- /// provides the name of the file or library (as with the -l option). The
- /// bool should be true for libraries and false for files, signifying
- /// "isLibrary".
- /// @brief A list of linkage items
- typedef std::vector<std::pair<std::string,bool> > ItemList;
-
/// This enumeration is used to control various optional features of the
/// linker.
enum ControlFlags {
QuietWarnings = 2, ///< Don't print warnings to stderr.
QuietErrors = 4 ///< Don't print errors to stderr.
};
-
+
enum LinkerMode {
DestroySource = 0, // Allow source module to be destroyed.
PreserveSource = 1 // Preserve the source module.
};
-
+
/// @}
/// @name Constructors
/// @{
/// must arrange for its destruct. After this method is called, the Linker
/// terminates the linking session for the returned Module. It will no
/// longer utilize the returned Module but instead resets itself for
- /// subsequent linking as if the constructor had been called. The Linker's
- /// LibPaths and flags to be reset, and memory will be released.
+ /// subsequent linking as if the constructor had been called.
/// @brief Release the linked/composite module.
Module* releaseModule();
- /// This method gets the list of libraries that form the path that the
- /// Linker will search when it is presented with a library name.
- /// @brief Get the Linkers library path
- const std::vector<sys::Path>& getLibPaths() const { return LibPaths; }
-
/// This method returns an error string suitable for printing to the user.
/// The return value will be empty unless an error occurred in one of the
/// LinkIn* methods. In those cases, the LinkIn* methods will have returned
/// @name Mutators
/// @{
public:
- /// Add a path to the list of paths that the Linker will search. The Linker
- /// accumulates the set of libraries added
- /// library paths for the target platform. The standard libraries will
- /// always be searched last. The added libraries will be searched in the
- /// order added.
- /// @brief Add a path.
- void addPath(const sys::Path& path);
-
- /// Add a set of paths to the list of paths that the linker will search. The
- /// Linker accumulates the set of libraries added. The \p paths will be
- /// added to the end of the Linker's list. Order will be retained.
- /// @brief Add a set of paths.
- void addPaths(const std::vector<std::string>& paths);
-
- /// This method augments the Linker's list of library paths with the system
- /// paths of the host operating system, include LLVM_LIB_SEARCH_PATH.
- /// @brief Add the system paths.
- void addSystemPaths();
-
- /// Control optional linker behavior by setting a group of flags. The flags
- /// are defined in the ControlFlags enumeration.
- /// @see ControlFlags
- /// @brief Set control flags.
- void setFlags(unsigned flags) { Flags = flags; }
-
/// This method links the \p Src module into the Linker's Composite module
- /// by calling LinkModules. All the other LinkIn* methods eventually
- /// result in calling this method to link a Module into the Linker's
- /// composite.
+ /// by calling LinkModules.
/// @see LinkModules
/// @returns True if an error occurs, false otherwise.
/// @brief Link in a module.
bool LinkInModule(
Module* Src, ///< Module linked into \p Dest
std::string* ErrorMsg = 0 /// Error/diagnostic string
- ) {
- return LinkModules(Composite, Src, Linker::DestroySource, ErrorMsg );
+ ) {
+ return LinkModules(Composite, Src, Linker::DestroySource, ErrorMsg);
}
/// This is the heart of the linker. This method will take unconditional
private:
LLVMContext& Context; ///< The context for global information
Module* Composite; ///< The composite module linked together
- std::vector<sys::Path> LibPaths; ///< The library search paths
unsigned Flags; ///< Flags to control optional behavior.
std::string Error; ///< Text of error that occurred.
std::string ProgramName; ///< Name of the program being linked
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