1 //===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Construct a compiler invocation object for command line driver arguments
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Frontend/Utils.h"
15 #include "clang/Frontend/CompilerInstance.h"
16 #include "clang/Frontend/DiagnosticOptions.h"
17 #include "clang/Frontend/FrontendDiagnostic.h"
18 #include "clang/Driver/Compilation.h"
19 #include "clang/Driver/Driver.h"
20 #include "clang/Driver/ArgList.h"
21 #include "clang/Driver/Options.h"
22 #include "clang/Driver/Tool.h"
23 #include "llvm/Support/Host.h"
24 using namespace clang;
25
26 /// createInvocationFromCommandLine - Construct a compiler invocation object for
27 /// a command line argument vector.
28 ///
29 /// \return A CompilerInvocation, or 0 if none was built for the given
30 /// argument vector.
31 CompilerInvocation *
createInvocationFromCommandLine(ArrayRef<const char * > ArgList,IntrusiveRefCntPtr<DiagnosticsEngine> Diags)32 clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList,
33 IntrusiveRefCntPtr<DiagnosticsEngine> Diags) {
34 if (!Diags.getPtr()) {
35 // No diagnostics engine was provided, so create our own diagnostics object
36 // with the default options.
37 DiagnosticOptions DiagOpts;
38 Diags = CompilerInstance::createDiagnostics(DiagOpts, ArgList.size(),
39 ArgList.begin());
40 }
41
42 SmallVector<const char *, 16> Args;
43 Args.push_back("<clang>"); // FIXME: Remove dummy argument.
44 Args.insert(Args.end(), ArgList.begin(), ArgList.end());
45
46 // FIXME: Find a cleaner way to force the driver into restricted modes.
47 Args.push_back("-fsyntax-only");
48
49 // FIXME: We shouldn't have to pass in the path info.
50 driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(),
51 "a.out", false, *Diags);
52 // Force driver to use clang.
53 // FIXME: This seems like a hack. Maybe the "Clang" tool subclass should be
54 // available for using it to get the arguments, thus avoiding the overkill
55 // of using the driver.
56 TheDriver.setForcedClangUse();
57
58 // Don't check that inputs exist, they may have been remapped.
59 TheDriver.setCheckInputsExist(false);
60
61 OwningPtr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
62
63 // Just print the cc1 options if -### was present.
64 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
65 C->PrintJob(llvm::errs(), C->getJobs(), "\n", true);
66 return 0;
67 }
68
69 // We expect to get back exactly one command job, if we didn't something
70 // failed.
71 const driver::JobList &Jobs = C->getJobs();
72 if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) {
73 SmallString<256> Msg;
74 llvm::raw_svector_ostream OS(Msg);
75 C->PrintJob(OS, C->getJobs(), "; ", true);
76 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
77 return 0;
78 }
79
80 const driver::Command *Cmd = cast<driver::Command>(*Jobs.begin());
81 if (StringRef(Cmd->getCreator().getName()) != "clang") {
82 Diags->Report(diag::err_fe_expected_clang_command);
83 return 0;
84 }
85
86 const driver::ArgStringList &CCArgs = Cmd->getArguments();
87 OwningPtr<CompilerInvocation> CI(new CompilerInvocation());
88 if (!CompilerInvocation::CreateFromArgs(*CI,
89 const_cast<const char **>(CCArgs.data()),
90 const_cast<const char **>(CCArgs.data()) +
91 CCArgs.size(),
92 *Diags))
93 return 0;
94 return CI.take();
95 }
96