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//===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Construct a compiler invocation object for command line driver arguments
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/Utils.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/Host.h"
using namespace clang;
using namespace llvm::opt;
/// createInvocationFromCommandLine - Construct a compiler invocation object for
/// a command line argument vector.
///
/// \return A CompilerInvocation, or 0 if none was built for the given
/// argument vector.
CompilerInvocation *
clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList,
IntrusiveRefCntPtr<DiagnosticsEngine> Diags) {
if (!Diags.get()) {
// No diagnostics engine was provided, so create our own diagnostics object
// with the default options.
Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
}
SmallVector<const char *, 16> Args;
Args.push_back("<clang>"); // FIXME: Remove dummy argument.
Args.insert(Args.end(), ArgList.begin(), ArgList.end());
// FIXME: Find a cleaner way to force the driver into restricted modes.
Args.push_back("-fsyntax-only");
// FIXME: We shouldn't have to pass in the path info.
driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(),
*Diags);
// Don't check that inputs exist, they may have been remapped.
TheDriver.setCheckInputsExist(false);
std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
// Just print the cc1 options if -### was present.
if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
C->getJobs().Print(llvm::errs(), "\n", true);
return nullptr;
}
// We expect to get back exactly one command job, if we didn't something
// failed. CUDA compilation is an exception as it creates multiple jobs. If
// that's the case, we proceed with the first job. If caller needs particular
// CUDA job, it should be controlled via --cuda-{host|device}-only option
// passed to the driver.
const driver::JobList &Jobs = C->getJobs();
bool CudaCompilation = false;
if (Jobs.size() > 1) {
for (auto &A : C->getActions())
if (isa<driver::CudaDeviceAction>(A)) {
CudaCompilation = true;
break;
}
}
if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
(Jobs.size() > 1 && !CudaCompilation)) {
SmallString<256> Msg;
llvm::raw_svector_ostream OS(Msg);
Jobs.Print(OS, "; ", true);
Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
return nullptr;
}
const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
if (StringRef(Cmd.getCreator().getName()) != "clang") {
Diags->Report(diag::err_fe_expected_clang_command);
return nullptr;
}
const ArgStringList &CCArgs = Cmd.getArguments();
std::unique_ptr<CompilerInvocation> CI(new CompilerInvocation());
if (!CompilerInvocation::CreateFromArgs(*CI,
const_cast<const char **>(CCArgs.data()),
const_cast<const char **>(CCArgs.data()) +
CCArgs.size(),
*Diags))
return nullptr;
return CI.release();
}
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