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//===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// 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;
std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine(
ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS, bool ShouldRecoverOnErorrs) {
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(ArgList.begin(), ArgList.end());
// FIXME: Find a cleaner way to force the driver into restricted modes.
// FIXME: We shouldn't have to pass in the path info.
driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(),
*Diags, VFS);
// Don't check that inputs exist, they may have been remapped.
std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
if (!C)
return nullptr;
// 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. Offload compilation is an exception as it creates multiple jobs. If
// that's the case, we proceed with the first job. If caller needs a
// particular job, it should be controlled via options (e.g.
// --cuda-{host|device}-only for CUDA) passed to the driver.
const driver::JobList &Jobs = C->getJobs();
bool OffloadCompilation = false;
if (Jobs.size() > 1) {
for (auto &A : C->getActions()){
// On MacOSX real actions may end up being wrapped in BindArchAction
if (isa<driver::BindArchAction>(A))
A = *A->input_begin();
if (isa<driver::OffloadAction>(A)) {
OffloadCompilation = true;
if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
(Jobs.size() > 1 && !OffloadCompilation)) {
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") {
return nullptr;
const ArgStringList &CCArgs = Cmd.getArguments();
auto CI = std::make_unique<CompilerInvocation>();
if (!CompilerInvocation::CreateFromArgs(*CI, CCArgs, *Diags) &&
return nullptr;
return CI;