Add the clang library to the repo (with some of my changes, too).

1 files changed, 66 insertions, 0 deletions

diff --git a/clang/tools/clang-check/ClangCheck.cpp b/clang/tools/clang-check/ClangCheck.cpp
new file mode 100644
index 0000000..d68e282
--- /dev/null
+++ b/clang/tools/clang-check/ClangCheck.cpp
@@ -0,0 +1,66 @@
+//===- examples/Tooling/ClangCheck.cpp - Clang check tool -----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements a clang-check tool that runs the
+//  clang::SyntaxOnlyAction over a number of translation units.
+//
+//  Usage:
+//  clang-check <cmake-output-dir> <file1> <file2> ...
+//
+//  Where <cmake-output-dir> is a CMake build directory in which a file named
+//  compile_commands.json exists (enable -DCMAKE_EXPORT_COMPILE_COMMANDS in
+//  CMake to get this output).
+//
+//  <file1> ... specify the paths of files in the CMake source tree. This  path
+//  is looked up in the compile command database. If the path of a file is
+//  absolute, it needs to point into CMake's source tree. If the path is
+//  relative, the current working directory needs to be in the CMake source
+//  tree and the file must be in a subdirectory of the current working
+//  directory. "./" prefixes in the relative files will be automatically
+//  removed, but the rest of a relative path must be a suffix of a path in
+//  the compile command line database.
+//
+//  For example, to use clang-check on all files in a subtree of the source
+//  tree, use:
+//
+//    /path/in/subtree $ find . -name '*.cpp'| xargs clang-check /path/to/source
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/CommandLine.h"
+#include "clang/Frontend/FrontendActions.h"
+#include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Tooling/Tooling.h"
+
+using namespace clang::tooling;
+using namespace llvm;
+
+cl::opt<std::string> BuildPath(
+  cl::Positional,
+  cl::desc("<build-path>"));
+
+cl::list<std::string> SourcePaths(
+  cl::Positional,
+  cl::desc("<source0> [... <sourceN>]"),
+  cl::OneOrMore);
+
+int main(int argc, const char **argv) {
+  llvm::OwningPtr<CompilationDatabase> Compilations(
+    FixedCompilationDatabase::loadFromCommandLine(argc, argv));
+  cl::ParseCommandLineOptions(argc, argv);
+  if (!Compilations) {
+    std::string ErrorMessage;
+    Compilations.reset(CompilationDatabase::loadFromDirectory(BuildPath,
+                                                              ErrorMessage));
+    if (!Compilations)
+      llvm::report_fatal_error(ErrorMessage);
+  }
+  ClangTool Tool(*Compilations, SourcePaths);
+  return Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>());
+}