CreateInvocationFromCommandLine.cpp revision 234353
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 14221339Sdim#include "clang/Frontend/Utils.h" 15221339Sdim#include "clang/Frontend/CompilerInstance.h" 16221339Sdim#include "clang/Frontend/DiagnosticOptions.h" 17221339Sdim#include "clang/Frontend/FrontendDiagnostic.h" 18221339Sdim#include "clang/Driver/Compilation.h" 19221339Sdim#include "clang/Driver/Driver.h" 20221339Sdim#include "clang/Driver/ArgList.h" 21221339Sdim#include "clang/Driver/Options.h" 22221339Sdim#include "clang/Driver/Tool.h" 23221339Sdim#include "llvm/Support/Host.h" 24221339Sdimusing namespace clang; 25221339Sdim 26221339Sdim/// createInvocationFromCommandLine - Construct a compiler invocation object for 27221339Sdim/// a command line argument vector. 28221339Sdim/// 29221339Sdim/// \return A CompilerInvocation, or 0 if none was built for the given 30221339Sdim/// argument vector. 31221339SdimCompilerInvocation * 32226633Sdimclang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList, 33234353Sdim IntrusiveRefCntPtr<DiagnosticsEngine> Diags) { 34221339Sdim if (!Diags.getPtr()) { 35221339Sdim // No diagnostics engine was provided, so create our own diagnostics object 36221339Sdim // with the default options. 37221339Sdim DiagnosticOptions DiagOpts; 38221339Sdim Diags = CompilerInstance::createDiagnostics(DiagOpts, ArgList.size(), 39221339Sdim ArgList.begin()); 40221339Sdim } 41221339Sdim 42226633Sdim SmallVector<const char *, 16> Args; 43221339Sdim Args.push_back("<clang>"); // FIXME: Remove dummy argument. 44221339Sdim Args.insert(Args.end(), ArgList.begin(), ArgList.end()); 45221339Sdim 46221339Sdim // FIXME: Find a cleaner way to force the driver into restricted modes. We 47221339Sdim // also want to force it to use clang. 48221339Sdim Args.push_back("-fsyntax-only"); 49221339Sdim 50221339Sdim // FIXME: We shouldn't have to pass in the path info. 51234353Sdim driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(), 52226633Sdim "a.out", false, *Diags); 53221339Sdim 54221339Sdim // Don't check that inputs exist, they may have been remapped. 55221339Sdim TheDriver.setCheckInputsExist(false); 56221339Sdim 57234353Sdim OwningPtr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 58221339Sdim 59221339Sdim // Just print the cc1 options if -### was present. 60221339Sdim if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 61221339Sdim C->PrintJob(llvm::errs(), C->getJobs(), "\n", true); 62221339Sdim return 0; 63221339Sdim } 64221339Sdim 65221339Sdim // We expect to get back exactly one command job, if we didn't something 66221339Sdim // failed. 67221339Sdim const driver::JobList &Jobs = C->getJobs(); 68223017Sdim if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) { 69234353Sdim SmallString<256> Msg; 70221339Sdim llvm::raw_svector_ostream OS(Msg); 71221339Sdim C->PrintJob(OS, C->getJobs(), "; ", true); 72221339Sdim Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 73221339Sdim return 0; 74221339Sdim } 75221339Sdim 76221339Sdim const driver::Command *Cmd = cast<driver::Command>(*Jobs.begin()); 77226633Sdim if (StringRef(Cmd->getCreator().getName()) != "clang") { 78221339Sdim Diags->Report(diag::err_fe_expected_clang_command); 79221339Sdim return 0; 80221339Sdim } 81221339Sdim 82221339Sdim const driver::ArgStringList &CCArgs = Cmd->getArguments(); 83234353Sdim OwningPtr<CompilerInvocation> CI(new CompilerInvocation()); 84234353Sdim if (!CompilerInvocation::CreateFromArgs(*CI, 85221339Sdim const_cast<const char **>(CCArgs.data()), 86221339Sdim const_cast<const char **>(CCArgs.data()) + 87221339Sdim CCArgs.size(), 88234353Sdim *Diags)) 89234353Sdim return 0; 90234353Sdim return CI.take(); 91221339Sdim} 92