1 //===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // Construct a compiler invocation object for command line driver arguments
11 //===----------------------------------------------------------------------===//
13 #include "clang/Frontend/Utils.h"
14 #include "clang/Basic/DiagnosticOptions.h"
15 #include "clang/Driver/Compilation.h"
16 #include "clang/Driver/Driver.h"
17 #include "clang/Driver/Action.h"
18 #include "clang/Driver/Options.h"
19 #include "clang/Driver/Tool.h"
20 #include "clang/Frontend/CompilerInstance.h"
21 #include "clang/Frontend/FrontendDiagnostic.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/Support/Host.h"
24 using namespace clang;
25 using namespace llvm::opt;
27 /// createInvocationFromCommandLine - Construct a compiler invocation object for
28 /// a command line argument vector.
30 /// \return A CompilerInvocation, or 0 if none was built for the given
32 std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine(
33 ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
34 IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) {
36 // No diagnostics engine was provided, so create our own diagnostics object
37 // with the default options.
38 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
41 SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end());
43 // FIXME: Find a cleaner way to force the driver into restricted modes.
44 Args.push_back("-fsyntax-only");
46 // FIXME: We shouldn't have to pass in the path info.
47 driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(),
50 // Don't check that inputs exist, they may have been remapped.
51 TheDriver.setCheckInputsExist(false);
53 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
57 // Just print the cc1 options if -### was present.
58 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
59 C->getJobs().Print(llvm::errs(), "\n", true);
63 // We expect to get back exactly one command job, if we didn't something
64 // failed. Offload compilation is an exception as it creates multiple jobs. If
65 // that's the case, we proceed with the first job. If caller needs a
66 // particular job, it should be controlled via options (e.g.
67 // --cuda-{host|device}-only for CUDA) passed to the driver.
68 const driver::JobList &Jobs = C->getJobs();
69 bool OffloadCompilation = false;
70 if (Jobs.size() > 1) {
71 for (auto &A : C->getActions()){
72 // On MacOSX real actions may end up being wrapped in BindArchAction
73 if (isa<driver::BindArchAction>(A))
74 A = *A->input_begin();
75 if (isa<driver::OffloadAction>(A)) {
76 OffloadCompilation = true;
81 if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
82 (Jobs.size() > 1 && !OffloadCompilation)) {
84 llvm::raw_svector_ostream OS(Msg);
85 Jobs.Print(OS, "; ", true);
86 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
90 const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
91 if (StringRef(Cmd.getCreator().getName()) != "clang") {
92 Diags->Report(diag::err_fe_expected_clang_command);
96 const ArgStringList &CCArgs = Cmd.getArguments();
97 auto CI = llvm::make_unique<CompilerInvocation>();
98 if (!CompilerInvocation::CreateFromArgs(*CI,
99 const_cast<const char **>(CCArgs.data()),
100 const_cast<const char **>(CCArgs.data()) +