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//===- 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>());
}
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