CreateInvocationFromCommandLine.cpp revision 280031
1221339Sdim//===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==// 2221339Sdim// 3221339Sdim// The LLVM Compiler Infrastructure 4221339Sdim// 5221339Sdim// This file is distributed under the University of Illinois Open Source 6221339Sdim// License. See LICENSE.TXT for details. 7221339Sdim// 8221339Sdim//===----------------------------------------------------------------------===// 9221339Sdim// 10221339Sdim// Construct a compiler invocation object for command line driver arguments 11221339Sdim// 12221339Sdim//===----------------------------------------------------------------------===// 13221339Sdim 14249423Sdim#include "clang/Frontend/Utils.h" 15243830Sdim#include "clang/Basic/DiagnosticOptions.h" 16221339Sdim#include "clang/Driver/Compilation.h" 17221339Sdim#include "clang/Driver/Driver.h" 18221339Sdim#include "clang/Driver/Options.h" 19221339Sdim#include "clang/Driver/Tool.h" 20249423Sdim#include "clang/Frontend/CompilerInstance.h" 21249423Sdim#include "clang/Frontend/FrontendDiagnostic.h" 22261991Sdim#include "llvm/Option/ArgList.h" 23221339Sdim#include "llvm/Support/Host.h" 24221339Sdimusing namespace clang; 25261991Sdimusing namespace llvm::opt; 26221339Sdim 27221339Sdim/// createInvocationFromCommandLine - Construct a compiler invocation object for 28221339Sdim/// a command line argument vector. 29221339Sdim/// 30221339Sdim/// \return A CompilerInvocation, or 0 if none was built for the given 31221339Sdim/// argument vector. 32221339SdimCompilerInvocation * 33226633Sdimclang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList, 34234353Sdim IntrusiveRefCntPtr<DiagnosticsEngine> Diags) { 35276479Sdim if (!Diags.get()) { 36221339Sdim // No diagnostics engine was provided, so create our own diagnostics object 37221339Sdim // with the default options. 38249423Sdim Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 39221339Sdim } 40221339Sdim 41226633Sdim SmallVector<const char *, 16> Args; 42221339Sdim Args.push_back("<clang>"); // FIXME: Remove dummy argument. 43221339Sdim Args.insert(Args.end(), ArgList.begin(), ArgList.end()); 44221339Sdim 45239462Sdim // FIXME: Find a cleaner way to force the driver into restricted modes. 46221339Sdim Args.push_back("-fsyntax-only"); 47221339Sdim 48221339Sdim // FIXME: We shouldn't have to pass in the path info. 49234353Sdim driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(), 50276479Sdim *Diags); 51221339Sdim 52221339Sdim // Don't check that inputs exist, they may have been remapped. 53221339Sdim TheDriver.setCheckInputsExist(false); 54221339Sdim 55276479Sdim std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 56221339Sdim 57221339Sdim // Just print the cc1 options if -### was present. 58221339Sdim if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 59261991Sdim C->getJobs().Print(llvm::errs(), "\n", true); 60276479Sdim return nullptr; 61221339Sdim } 62221339Sdim 63221339Sdim // We expect to get back exactly one command job, if we didn't something 64221339Sdim // failed. 65221339Sdim const driver::JobList &Jobs = C->getJobs(); 66223017Sdim if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) { 67234353Sdim SmallString<256> Msg; 68221339Sdim llvm::raw_svector_ostream OS(Msg); 69261991Sdim Jobs.Print(OS, "; ", true); 70221339Sdim Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 71276479Sdim return nullptr; 72221339Sdim } 73221339Sdim 74280031Sdim const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin()); 75280031Sdim if (StringRef(Cmd.getCreator().getName()) != "clang") { 76221339Sdim Diags->Report(diag::err_fe_expected_clang_command); 77276479Sdim return nullptr; 78221339Sdim } 79221339Sdim 80280031Sdim const ArgStringList &CCArgs = Cmd.getArguments(); 81276479Sdim std::unique_ptr<CompilerInvocation> CI(new CompilerInvocation()); 82234353Sdim if (!CompilerInvocation::CreateFromArgs(*CI, 83221339Sdim const_cast<const char **>(CCArgs.data()), 84221339Sdim const_cast<const char **>(CCArgs.data()) + 85221339Sdim CCArgs.size(), 86234353Sdim *Diags)) 87276479Sdim return nullptr; 88276479Sdim return CI.release(); 89221339Sdim} 90