Add new linker

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@780 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 70 insertions, 0 deletions

diff --git a/tools/link/Makefile b/tools/link/Makefile
new file mode 100644
index 0000000000..599d4cb965
--- /dev/null
+++ b/tools/link/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../..
+
+TOOLNAME = link
+USEDLIBS = transforms bcreader bcwriter asmwriter analysis vmcore asmwriter support
+
+include $(LEVEL)/Makefile.common
diff --git a/tools/link/link.cpp b/tools/link/link.cpp
new file mode 100644
index 0000000000..8dbcf4895c
--- /dev/null
+++ b/tools/link/link.cpp
@@ -0,0 +1,64 @@
+//===----------------------------------------------------------------------===//
+// LLVM 'LINK' UTILITY 
+//
+// This utility may be invoked in the following manner:
+//  link a.bc b.bc c.bc -o x.bc
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Linker.h"
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Bytecode/Writer.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Module.h"
+#include "llvm/Method.h"
+#include <fstream.h>
+#include <memory>
+
+
+cl::StringList InputFilenames("", "Load <arg> files, linking them together", 
+			      cl::OneOrMore);
+cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "-");
+cl::Flag   Force         ("f", "Overwrite output files", cl::NoFlags, false);
+
+
+int main(int argc, char **argv) {
+  cl::ParseCommandLineOptions(argc, argv, " llvm linker\n");
+  assert(InputFilenames.size() > 0 && "OneOrMore is not working");
+
+  std::auto_ptr<Module> Composite(ParseBytecodeFile(InputFilenames[0]));
+  if (Composite.get() == 0) {
+    cerr << "Error opening bytecode file: '" << InputFilenames[0] << "'\n";
+    return 1;
+  }
+
+  for (unsigned i = 1; i < InputFilenames.size(); ++i) {
+    auto_ptr<Module> M(ParseBytecodeFile(InputFilenames[i]));
+    if (M.get() == 0) {
+      cerr << "Error opening bytecode file: '" << InputFilenames[i] << "'\n";
+      return 1;
+    }
+    
+    string ErrorMessage;
+    if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
+      cerr << "Error linking in '" << InputFilenames[i] << "': "
+	   << ErrorMessage << endl;
+      return 1;
+    }
+  }
+
+  ostream *Out = &cout;  // Default to printing to stdout...
+  if (OutputFilename != "-") {
+    Out = new ofstream(OutputFilename.c_str(), 
+		       (Force ? 0 : ios::noreplace)|ios::out);
+    if (!Out->good()) {
+      cerr << "Error opening '" << OutputFilename << "'!\n";
+      return 1;
+    }
+  }
+
+  WriteBytecodeToFile(Composite.get(), *Out);
+
+  if (Out != &cout) delete Out;
+  return 0;
+}