Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 1 | //===- lib/Linker/LinkItems.cpp - Link LLVM objects and libraries ---------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file was developed by Reid Spencer and is distributed under the |
| 6 | // University of Illinois Open Source License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file contains routines to handle linking together LLVM bytecode files, |
| 11 | // and to handle annoying things like static libraries. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
| 15 | #include "llvm/Linker.h" |
| 16 | #include "llvm/Module.h" |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 17 | |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 18 | using namespace llvm; |
| 19 | |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 20 | // LinkItems - preserve link order for an arbitrary set of linkage items. |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 21 | bool |
| 22 | Linker::LinkInItems(const ItemList& Items) { |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 23 | // For each linkage item ... |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 24 | for (ItemList::const_iterator I = Items.begin(), E = Items.end(); |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 25 | I != E; ++I) { |
| 26 | if (I->second) { |
| 27 | // Link in the library suggested. |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 28 | if (LinkInLibrary(I->first)) |
| 29 | return true; |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 30 | } else { |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 31 | if (LinkInFile(sys::Path(I->first))) |
| 32 | return true; |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 33 | } |
| 34 | } |
| 35 | |
| 36 | // At this point we have processed all the link items provided to us. Since |
| 37 | // we have an aggregated module at this point, the dependent libraries in |
| 38 | // that module should also be aggregated with duplicates eliminated. This is |
| 39 | // now the time to process the dependent libraries to resolve any remaining |
| 40 | // symbols. |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 41 | const Module::LibraryListType& DepLibs = Composite->getLibraries(); |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 42 | for (Module::LibraryListType::const_iterator I = DepLibs.begin(), |
| 43 | E = DepLibs.end(); I != E; ++I) { |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 44 | if(LinkInLibrary(*I)) |
| 45 | return true; |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 46 | } |
| 47 | |
Reid Spencer | e84de29 | 2004-12-13 02:59:52 +0000 | [diff] [blame] | 48 | return false; |
Reid Spencer | 4bdf1c9 | 2004-12-05 19:14:55 +0000 | [diff] [blame] | 49 | } |
Chris Lattner | ad988f3 | 2005-03-15 22:51:40 +0000 | [diff] [blame^] | 50 | |
| 51 | |
| 52 | /// LinkInLibrary - links one library into the HeadModule. |
| 53 | /// |
| 54 | bool Linker::LinkInLibrary(const std::string& Lib) { |
| 55 | // Determine where this library lives. |
| 56 | sys::Path Pathname = FindLib(Lib); |
| 57 | if (Pathname.isEmpty()) |
| 58 | return warning("Cannot find library '" + Lib + "'"); |
| 59 | |
| 60 | // If its an archive, try to link it in |
| 61 | if (Pathname.isArchive()) { |
| 62 | if (LinkInArchive(Pathname)) |
| 63 | return error("Cannot link archive '" + Pathname.toString() + "'"); |
| 64 | } else if (Pathname.isBytecodeFile()) { |
| 65 | // LLVM ".so" file. |
| 66 | if (LinkInFile(Pathname)) |
| 67 | return error("Cannot link file '" + Pathname.toString() + "'"); |
| 68 | |
| 69 | } else if (Pathname.isDynamicLibrary()) { |
| 70 | return warning("Library '" + Lib + "' is a native dynamic library."); |
| 71 | } else { |
| 72 | return warning("Supposed library '" + Lib + "' isn't a library."); |
| 73 | } |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | /// LinkLibraries - takes the specified library files and links them into the |
| 78 | /// main bytecode object file. |
| 79 | /// |
| 80 | /// Inputs: |
| 81 | /// Libraries - The list of libraries to link into the module. |
| 82 | /// |
| 83 | /// Return value: |
| 84 | /// FALSE - No error. |
| 85 | /// TRUE - Error. |
| 86 | /// |
| 87 | bool Linker::LinkInLibraries(const std::vector<std::string> &Libraries) { |
| 88 | |
| 89 | // Process the set of libraries we've been provided. |
| 90 | for (unsigned i = 0; i < Libraries.size(); ++i) |
| 91 | if (LinkInLibrary(Libraries[i])) |
| 92 | return true; |
| 93 | |
| 94 | // At this point we have processed all the libraries provided to us. Since |
| 95 | // we have an aggregated module at this point, the dependent libraries in |
| 96 | // that module should also be aggregated with duplicates eliminated. This is |
| 97 | // now the time to process the dependent libraries to resolve any remaining |
| 98 | // symbols. |
| 99 | const Module::LibraryListType& DepLibs = Composite->getLibraries(); |
| 100 | for (Module::LibraryListType::const_iterator I = DepLibs.begin(), |
| 101 | E = DepLibs.end(); I != E; ++I) |
| 102 | if (LinkInLibrary(*I)) |
| 103 | return true; |
| 104 | |
| 105 | return false; |
| 106 | } |