xref: /llvm-project/flang/lib/Frontend/CompilerInvocation.cpp (revision 7b73ca3043fecfc5fa6bbf5b28edfee61a83ff9f) 
1 //===- CompilerInvocation.cpp ---------------------------------------------===//
2 //
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
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "flang/Frontend/CompilerInvocation.h"
10 #include "flang/Common/Fortran-features.h"
11 #include "flang/Frontend/PreprocessorOptions.h"
12 #include "flang/Semantics/semantics.h"
13 #include "flang/Version.inc"
14 #include "clang/Basic/AllDiagnostics.h"
15 #include "clang/Basic/DiagnosticDriver.h"
16 #include "clang/Basic/DiagnosticOptions.h"
17 #include "clang/Driver/DriverDiagnostic.h"
18 #include "clang/Driver/Options.h"
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/ADT/StringSwitch.h"
21 #include "llvm/Option/Arg.h"
22 #include "llvm/Option/ArgList.h"
23 #include "llvm/Option/OptTable.h"
24 #include "llvm/Support/FileSystem.h"
25 #include "llvm/Support/FileUtilities.h"
26 #include "llvm/Support/Process.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include <memory>
29 
30 using namespace Fortran::frontend;
31 
32 //===----------------------------------------------------------------------===//
33 // Initialization.
34 //===----------------------------------------------------------------------===//
35 CompilerInvocationBase::CompilerInvocationBase()
36     : diagnosticOpts_(new clang::DiagnosticOptions()),
37       preprocessorOpts_(new PreprocessorOptions()) {}
38 
39 CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &x)
40     : diagnosticOpts_(new clang::DiagnosticOptions(x.GetDiagnosticOpts())),
41       preprocessorOpts_(new PreprocessorOptions(x.preprocessorOpts())) {}
42 
43 CompilerInvocationBase::~CompilerInvocationBase() = default;
44 
45 //===----------------------------------------------------------------------===//
46 // Deserialization (from args)
47 //===----------------------------------------------------------------------===//
48 static bool parseShowColorsArgs(
49     const llvm::opt::ArgList &args, bool defaultColor) {
50   // Color diagnostics default to auto ("on" if terminal supports) in the driver
51   // but default to off in cc1, needing an explicit OPT_fdiagnostics_color.
52   // Support both clang's -f[no-]color-diagnostics and gcc's
53   // -f[no-]diagnostics-colors[=never|always|auto].
54   enum {
55     Colors_On,
56     Colors_Off,
57     Colors_Auto
58   } ShowColors = defaultColor ? Colors_Auto : Colors_Off;
59 
60   for (auto *a : args) {
61     const llvm::opt::Option &O = a->getOption();
62     if (O.matches(clang::driver::options::OPT_fcolor_diagnostics) ||
63         O.matches(clang::driver::options::OPT_fdiagnostics_color)) {
64       ShowColors = Colors_On;
65     } else if (O.matches(clang::driver::options::OPT_fno_color_diagnostics) ||
66         O.matches(clang::driver::options::OPT_fno_diagnostics_color)) {
67       ShowColors = Colors_Off;
68     } else if (O.matches(clang::driver::options::OPT_fdiagnostics_color_EQ)) {
69       llvm::StringRef value(a->getValue());
70       if (value == "always")
71         ShowColors = Colors_On;
72       else if (value == "never")
73         ShowColors = Colors_Off;
74       else if (value == "auto")
75         ShowColors = Colors_Auto;
76     }
77   }
78 
79   return ShowColors == Colors_On ||
80       (ShowColors == Colors_Auto && llvm::sys::Process::StandardErrHasColors());
81 }
82 
83 bool Fortran::frontend::ParseDiagnosticArgs(clang::DiagnosticOptions &opts,
84     llvm::opt::ArgList &args, bool defaultDiagColor) {
85   opts.ShowColors = parseShowColorsArgs(args, defaultDiagColor);
86 
87   return true;
88 }
89 
90 // Tweak the frontend configuration based on the frontend action
91 static void setUpFrontendBasedOnAction(FrontendOptions &opts) {
92   assert(opts.programAction != Fortran::frontend::InvalidAction &&
93       "Fortran frontend action not set!");
94 
95   if (opts.programAction == DebugDumpParsingLog)
96     opts.instrumentedParse = true;
97 
98   if (opts.programAction == DebugDumpProvenance ||
99       opts.programAction == Fortran::frontend::GetDefinition)
100     opts.needProvenanceRangeToCharBlockMappings = true;
101 }
102 
103 static bool ParseFrontendArgs(FrontendOptions &opts, llvm::opt::ArgList &args,
104     clang::DiagnosticsEngine &diags) {
105   unsigned numErrorsBefore = diags.getNumErrors();
106 
107   // By default the frontend driver creates a ParseSyntaxOnly action.
108   opts.programAction = ParseSyntaxOnly;
109 
110   // Identify the action (i.e. opts.ProgramAction)
111   if (const llvm::opt::Arg *a =
112           args.getLastArg(clang::driver::options::OPT_Action_Group)) {
113     switch (a->getOption().getID()) {
114     default: {
115       llvm_unreachable("Invalid option in group!");
116     }
117     case clang::driver::options::OPT_test_io:
118       opts.programAction = InputOutputTest;
119       break;
120     case clang::driver::options::OPT_E:
121       opts.programAction = PrintPreprocessedInput;
122       break;
123     case clang::driver::options::OPT_fsyntax_only:
124       opts.programAction = ParseSyntaxOnly;
125       break;
126     case clang::driver::options::OPT_emit_obj:
127       opts.programAction = EmitObj;
128       break;
129     case clang::driver::options::OPT_fdebug_unparse:
130       opts.programAction = DebugUnparse;
131       break;
132     case clang::driver::options::OPT_fdebug_unparse_no_sema:
133       opts.programAction = DebugUnparseNoSema;
134       break;
135     case clang::driver::options::OPT_fdebug_unparse_with_symbols:
136       opts.programAction = DebugUnparseWithSymbols;
137       break;
138     case clang::driver::options::OPT_fdebug_dump_symbols:
139       opts.programAction = DebugDumpSymbols;
140       break;
141     case clang::driver::options::OPT_fdebug_dump_parse_tree:
142       opts.programAction = DebugDumpParseTree;
143       break;
144     case clang::driver::options::OPT_fdebug_dump_all:
145       opts.programAction = DebugDumpAll;
146       break;
147     case clang::driver::options::OPT_fdebug_dump_parse_tree_no_sema:
148       opts.programAction = DebugDumpParseTreeNoSema;
149       break;
150     case clang::driver::options::OPT_fdebug_dump_provenance:
151       opts.programAction = DebugDumpProvenance;
152       break;
153     case clang::driver::options::OPT_fdebug_dump_parsing_log:
154       opts.programAction = DebugDumpParsingLog;
155       break;
156     case clang::driver::options::OPT_fdebug_measure_parse_tree:
157       opts.programAction = DebugMeasureParseTree;
158       break;
159     case clang::driver::options::OPT_fdebug_pre_fir_tree:
160       opts.programAction = DebugPreFIRTree;
161       break;
162     case clang::driver::options::OPT_fget_symbols_sources:
163       opts.programAction = GetSymbolsSources;
164       break;
165     case clang::driver::options::OPT_fget_definition:
166       opts.programAction = GetDefinition;
167       break;
168     case clang::driver::options::OPT_init_only:
169       opts.programAction = InitOnly;
170       break;
171 
172       // TODO:
173       // case clang::driver::options::OPT_emit_llvm:
174       // case clang::driver::options::OPT_emit_llvm_only:
175       // case clang::driver::options::OPT_emit_codegen_only:
176       // case clang::driver::options::OPT_emit_module:
177       // (...)
178     }
179 
180     // Parse the values provided with `-fget-definition` (there should be 3
181     // integers)
182     if (llvm::opt::OptSpecifier(a->getOption().getID()) ==
183         clang::driver::options::OPT_fget_definition) {
184       unsigned optVals[3] = {0, 0, 0};
185 
186       for (unsigned i = 0; i < 3; i++) {
187         llvm::StringRef val = a->getValue(i);
188 
189         if (val.getAsInteger(10, optVals[i])) {
190           // A non-integer was encountered - that's an error.
191           diags.Report(clang::diag::err_drv_invalid_value)
192               << a->getOption().getName() << val;
193           break;
194         }
195       }
196       opts.getDefVals.line = optVals[0];
197       opts.getDefVals.startColumn = optVals[1];
198       opts.getDefVals.endColumn = optVals[2];
199     }
200   }
201 
202   opts.outputFile = args.getLastArgValue(clang::driver::options::OPT_o);
203   opts.showHelp = args.hasArg(clang::driver::options::OPT_help);
204   opts.showVersion = args.hasArg(clang::driver::options::OPT_version);
205 
206   // Get the input kind (from the value passed via `-x`)
207   InputKind dashX(Language::Unknown);
208   if (const llvm::opt::Arg *a =
209           args.getLastArg(clang::driver::options::OPT_x)) {
210     llvm::StringRef XValue = a->getValue();
211     // Principal languages.
212     dashX = llvm::StringSwitch<InputKind>(XValue)
213                 .Case("f90", Language::Fortran)
214                 .Default(Language::Unknown);
215 
216     // Some special cases cannot be combined with suffixes.
217     if (dashX.IsUnknown())
218       dashX = llvm::StringSwitch<InputKind>(XValue)
219                   .Case("ir", Language::LLVM_IR)
220                   .Default(Language::Unknown);
221 
222     if (dashX.IsUnknown())
223       diags.Report(clang::diag::err_drv_invalid_value)
224           << a->getAsString(args) << a->getValue();
225   }
226 
227   // Collect the input files and save them in our instance of FrontendOptions.
228   std::vector<std::string> inputs =
229       args.getAllArgValues(clang::driver::options::OPT_INPUT);
230   opts.inputs.clear();
231   if (inputs.empty())
232     // '-' is the default input if none is given.
233     inputs.push_back("-");
234   for (unsigned i = 0, e = inputs.size(); i != e; ++i) {
235     InputKind ik = dashX;
236     if (ik.IsUnknown()) {
237       ik = FrontendOptions::GetInputKindForExtension(
238           llvm::StringRef(inputs[i]).rsplit('.').second);
239       if (ik.IsUnknown())
240         ik = Language::Unknown;
241       if (i == 0)
242         dashX = ik;
243     }
244 
245     opts.inputs.emplace_back(std::move(inputs[i]), ik);
246   }
247 
248   // Set fortranForm based on options -ffree-form and -ffixed-form.
249   if (const auto *arg = args.getLastArg(clang::driver::options::OPT_ffixed_form,
250           clang::driver::options::OPT_ffree_form)) {
251     opts.fortranForm =
252         arg->getOption().matches(clang::driver::options::OPT_ffixed_form)
253         ? FortranForm::FixedForm
254         : FortranForm::FreeForm;
255   }
256 
257   // Set fixedFormColumns based on -ffixed-line-length=<value>
258   if (const auto *arg =
259           args.getLastArg(clang::driver::options::OPT_ffixed_line_length_EQ)) {
260     llvm::StringRef argValue = llvm::StringRef(arg->getValue());
261     std::int64_t columns = -1;
262     if (argValue == "none") {
263       columns = 0;
264     } else if (argValue.getAsInteger(/*Radix=*/10, columns)) {
265       columns = -1;
266     }
267     if (columns < 0) {
268       diags.Report(clang::diag::err_drv_negative_columns)
269           << arg->getOption().getName() << arg->getValue();
270     } else if (columns == 0) {
271       opts.fixedFormColumns = 1000000;
272     } else if (columns < 7) {
273       diags.Report(clang::diag::err_drv_small_columns)
274           << arg->getOption().getName() << arg->getValue() << "7";
275     } else {
276       opts.fixedFormColumns = columns;
277     }
278   }
279 
280   // -f{no-}implicit-none
281   opts.features.Enable(
282       Fortran::common::LanguageFeature::ImplicitNoneTypeAlways,
283       args.hasFlag(clang::driver::options::OPT_fimplicit_none,
284           clang::driver::options::OPT_fno_implicit_none, false));
285 
286   // -f{no-}backslash
287   opts.features.Enable(Fortran::common::LanguageFeature::BackslashEscapes,
288       args.hasFlag(clang::driver::options::OPT_fbackslash,
289           clang::driver::options::OPT_fno_backslash, false));
290 
291   // -f{no-}logical-abbreviations
292   opts.features.Enable(Fortran::common::LanguageFeature::LogicalAbbreviations,
293       args.hasFlag(clang::driver::options::OPT_flogical_abbreviations,
294           clang::driver::options::OPT_fno_logical_abbreviations, false));
295 
296   // -f{no-}xor-operator
297   opts.features.Enable(Fortran::common::LanguageFeature::XOROperator,
298       args.hasFlag(clang::driver::options::OPT_fxor_operator,
299           clang::driver::options::OPT_fno_xor_operator, false));
300 
301   if (args.hasArg(
302           clang::driver::options::OPT_falternative_parameter_statement)) {
303     opts.features.Enable(Fortran::common::LanguageFeature::OldStyleParameter);
304   }
305   if (const llvm::opt::Arg *arg =
306           args.getLastArg(clang::driver::options::OPT_finput_charset_EQ)) {
307     llvm::StringRef argValue = arg->getValue();
308     if (argValue == "utf-8") {
309       opts.encoding = Fortran::parser::Encoding::UTF_8;
310     } else if (argValue == "latin-1") {
311       opts.encoding = Fortran::parser::Encoding::LATIN_1;
312     } else {
313       diags.Report(clang::diag::err_drv_invalid_value)
314           << arg->getAsString(args) << argValue;
315     }
316   }
317 
318   setUpFrontendBasedOnAction(opts);
319   opts.dashX = dashX;
320 
321   return diags.getNumErrors() == numErrorsBefore;
322 }
323 
324 // Generate the path to look for intrinsic modules
325 static std::string getIntrinsicDir() {
326   // TODO: Find a system independent API
327   llvm::SmallString<128> driverPath;
328   driverPath.assign(llvm::sys::fs::getMainExecutable(nullptr, nullptr));
329   llvm::sys::path::remove_filename(driverPath);
330   driverPath.append("/../include/flang/");
331   return std::string(driverPath);
332 }
333 
334 /// Parses all preprocessor input arguments and populates the preprocessor
335 /// options accordingly.
336 ///
337 /// \param [in] opts The preprocessor options instance
338 /// \param [out] args The list of input arguments
339 static void parsePreprocessorArgs(
340     Fortran::frontend::PreprocessorOptions &opts, llvm::opt::ArgList &args) {
341   // Add macros from the command line.
342   for (const auto *currentArg : args.filtered(
343            clang::driver::options::OPT_D, clang::driver::options::OPT_U)) {
344     if (currentArg->getOption().matches(clang::driver::options::OPT_D)) {
345       opts.addMacroDef(currentArg->getValue());
346     } else {
347       opts.addMacroUndef(currentArg->getValue());
348     }
349   }
350 
351   // Add the ordered list of -I's.
352   for (const auto *currentArg : args.filtered(clang::driver::options::OPT_I))
353     opts.searchDirectoriesFromDashI.emplace_back(currentArg->getValue());
354 
355   // Prepend the ordered list of -intrinsic-modules-path
356   // to the default location to search.
357   for (const auto *currentArg :
358       args.filtered(clang::driver::options::OPT_fintrinsic_modules_path))
359     opts.searchDirectoriesFromIntrModPath.emplace_back(currentArg->getValue());
360 
361   // -cpp/-nocpp
362   if (const auto *currentArg = args.getLastArg(
363           clang::driver::options::OPT_cpp, clang::driver::options::OPT_nocpp))
364     opts.macrosFlag =
365         (currentArg->getOption().matches(clang::driver::options::OPT_cpp))
366         ? PPMacrosFlag::Include
367         : PPMacrosFlag::Exclude;
368 
369   opts.noReformat = args.hasArg(clang::driver::options::OPT_fno_reformat);
370   opts.noLineDirectives = args.hasArg(clang::driver::options::OPT_P);
371 }
372 
373 /// Parses all semantic related arguments and populates the variables
374 /// options accordingly. Returns false if new errors are generated.
375 static bool parseSemaArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
376     clang::DiagnosticsEngine &diags) {
377   unsigned numErrorsBefore = diags.getNumErrors();
378 
379   // -J/module-dir option
380   auto moduleDirList =
381       args.getAllArgValues(clang::driver::options::OPT_module_dir);
382   // User can only specify -J/-module-dir once
383   // https://gcc.gnu.org/onlinedocs/gfortran/Directory-Options.html
384   if (moduleDirList.size() > 1) {
385     const unsigned diagID =
386         diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
387             "Only one '-module-dir/-J' option allowed");
388     diags.Report(diagID);
389   }
390   if (moduleDirList.size() == 1)
391     res.SetModuleDir(moduleDirList[0]);
392 
393   // -fdebug-module-writer option
394   if (args.hasArg(clang::driver::options::OPT_fdebug_module_writer)) {
395     res.SetDebugModuleDir(true);
396   }
397 
398   // -module-suffix
399   if (const auto *moduleSuffix =
400           args.getLastArg(clang::driver::options::OPT_module_suffix)) {
401     res.SetModuleFileSuffix(moduleSuffix->getValue());
402   }
403 
404   // -f{no-}analyzed-objects-for-unparse
405   res.SetUseAnalyzedObjectsForUnparse(
406       args.hasFlag(clang::driver::options::OPT_fanalyzed_objects_for_unparse,
407           clang::driver::options::OPT_fno_analyzed_objects_for_unparse, true));
408 
409   return diags.getNumErrors() == numErrorsBefore;
410 }
411 
412 /// Parses all diagnostics related arguments and populates the variables
413 /// options accordingly. Returns false if new errors are generated.
414 static bool parseDiagArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
415     clang::DiagnosticsEngine &diags) {
416   unsigned numErrorsBefore = diags.getNumErrors();
417 
418   // -Werror option
419   // TODO: Currently throws a Diagnostic for anything other than -W<error>,
420   // this has to change when other -W<opt>'s are supported.
421   if (args.hasArg(clang::driver::options::OPT_W_Joined)) {
422     if (args.getLastArgValue(clang::driver::options::OPT_W_Joined)
423             .equals("error")) {
424       res.SetWarnAsErr(true);
425     } else {
426       const unsigned diagID =
427           diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
428               "Only `-Werror` is supported currently.");
429       diags.Report(diagID);
430     }
431   }
432 
433   return diags.getNumErrors() == numErrorsBefore;
434 }
435 
436 /// Parses all Dialect related arguments and populates the variables
437 /// options accordingly. Returns false if new errors are generated.
438 static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
439     clang::DiagnosticsEngine &diags) {
440   unsigned numErrorsBefore = diags.getNumErrors();
441 
442   // -fdefault* family
443   if (args.hasArg(clang::driver::options::OPT_fdefault_real_8)) {
444     res.defaultKinds().set_defaultRealKind(8);
445     res.defaultKinds().set_doublePrecisionKind(16);
446   }
447   if (args.hasArg(clang::driver::options::OPT_fdefault_integer_8)) {
448     res.defaultKinds().set_defaultIntegerKind(8);
449     res.defaultKinds().set_subscriptIntegerKind(8);
450     res.defaultKinds().set_sizeIntegerKind(8);
451   }
452   if (args.hasArg(clang::driver::options::OPT_fdefault_double_8)) {
453     if (!args.hasArg(clang::driver::options::OPT_fdefault_real_8)) {
454       // -fdefault-double-8 has to be used with -fdefault-real-8
455       // to be compatible with gfortran
456       const unsigned diagID =
457           diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
458               "Use of `-fdefault-double-8` requires `-fdefault-real-8`");
459       diags.Report(diagID);
460     }
461     // https://gcc.gnu.org/onlinedocs/gfortran/Fortran-Dialect-Options.html
462     res.defaultKinds().set_doublePrecisionKind(8);
463   }
464   if (args.hasArg(clang::driver::options::OPT_flarge_sizes))
465     res.defaultKinds().set_sizeIntegerKind(8);
466 
467   // -fopenmp and -fopenacc
468   if (args.hasArg(clang::driver::options::OPT_fopenacc)) {
469     res.frontendOpts().features.Enable(
470         Fortran::common::LanguageFeature::OpenACC);
471   }
472   if (args.hasArg(clang::driver::options::OPT_fopenmp)) {
473     res.frontendOpts().features.Enable(
474         Fortran::common::LanguageFeature::OpenMP);
475   }
476 
477   // -pedantic
478   if (args.hasArg(clang::driver::options::OPT_pedantic)) {
479     res.set_EnableConformanceChecks();
480   }
481   // -std=f2018 (currently this implies -pedantic)
482   // TODO: Set proper options when more fortran standards
483   // are supported.
484   if (args.hasArg(clang::driver::options::OPT_std_EQ)) {
485     auto standard = args.getLastArgValue(clang::driver::options::OPT_std_EQ);
486     // We only allow f2018 as the given standard
487     if (standard.equals("f2018")) {
488       res.set_EnableConformanceChecks();
489     } else {
490       const unsigned diagID =
491           diags.getCustomDiagID(clang::DiagnosticsEngine::Error,
492               "Only -std=f2018 is allowed currently.");
493       diags.Report(diagID);
494     }
495   }
496   return diags.getNumErrors() == numErrorsBefore;
497 }
498 
499 bool CompilerInvocation::CreateFromArgs(CompilerInvocation &res,
500     llvm::ArrayRef<const char *> commandLineArgs,
501     clang::DiagnosticsEngine &diags) {
502 
503   bool success = true;
504 
505   // Parse the arguments
506   const llvm::opt::OptTable &opts = clang::driver::getDriverOptTable();
507   const unsigned includedFlagsBitmask = clang::driver::options::FC1Option;
508   unsigned missingArgIndex, missingArgCount;
509   llvm::opt::InputArgList args = opts.ParseArgs(
510       commandLineArgs, missingArgIndex, missingArgCount, includedFlagsBitmask);
511 
512   // Check for missing argument error.
513   if (missingArgCount) {
514     diags.Report(clang::diag::err_drv_missing_argument)
515         << args.getArgString(missingArgIndex) << missingArgCount;
516     success = false;
517   }
518 
519   // Issue errors on unknown arguments
520   for (const auto *a : args.filtered(clang::driver::options::OPT_UNKNOWN)) {
521     auto argString = a->getAsString(args);
522     std::string nearest;
523     if (opts.findNearest(argString, nearest, includedFlagsBitmask) > 1)
524       diags.Report(clang::diag::err_drv_unknown_argument) << argString;
525     else
526       diags.Report(clang::diag::err_drv_unknown_argument_with_suggestion)
527           << argString << nearest;
528     success = false;
529   }
530 
531   success &= ParseFrontendArgs(res.frontendOpts(), args, diags);
532   parsePreprocessorArgs(res.preprocessorOpts(), args);
533   success &= parseSemaArgs(res, args, diags);
534   success &= parseDialectArgs(res, args, diags);
535   success &= parseDiagArgs(res, args, diags);
536 
537   return success;
538 }
539 
540 void CompilerInvocation::collectMacroDefinitions() {
541   auto &ppOpts = this->preprocessorOpts();
542 
543   for (unsigned i = 0, n = ppOpts.macros.size(); i != n; ++i) {
544     llvm::StringRef macro = ppOpts.macros[i].first;
545     bool isUndef = ppOpts.macros[i].second;
546 
547     std::pair<llvm::StringRef, llvm::StringRef> macroPair = macro.split('=');
548     llvm::StringRef macroName = macroPair.first;
549     llvm::StringRef macroBody = macroPair.second;
550 
551     // For an #undef'd macro, we only care about the name.
552     if (isUndef) {
553       parserOpts_.predefinitions.emplace_back(
554           macroName.str(), std::optional<std::string>{});
555       continue;
556     }
557 
558     // For a #define'd macro, figure out the actual definition.
559     if (macroName.size() == macro.size())
560       macroBody = "1";
561     else {
562       // Note: GCC drops anything following an end-of-line character.
563       llvm::StringRef::size_type End = macroBody.find_first_of("\n\r");
564       macroBody = macroBody.substr(0, End);
565     }
566     parserOpts_.predefinitions.emplace_back(
567         macroName, std::optional<std::string>(macroBody.str()));
568   }
569 }
570 
571 void CompilerInvocation::SetDefaultFortranOpts() {
572   auto &fortranOptions = fortranOpts();
573 
574   std::vector<std::string> searchDirectories{"."s};
575   fortranOptions.searchDirectories = searchDirectories;
576   fortranOptions.isFixedForm = false;
577 }
578 
579 // TODO: When expanding this method, consider creating a dedicated API for
580 // this. Also at some point we will need to differentiate between different
581 // targets and add dedicated predefines for each.
582 void CompilerInvocation::setDefaultPredefinitions() {
583   auto &fortranOptions = fortranOpts();
584   const auto &frontendOptions = frontendOpts();
585 
586   // Populate the macro list with version numbers and other predefinitions.
587   fortranOptions.predefinitions.emplace_back("__flang__", "1");
588   fortranOptions.predefinitions.emplace_back(
589       "__flang_major__", FLANG_VERSION_MAJOR_STRING);
590   fortranOptions.predefinitions.emplace_back(
591       "__flang_minor__", FLANG_VERSION_MINOR_STRING);
592   fortranOptions.predefinitions.emplace_back(
593       "__flang_patchlevel__", FLANG_VERSION_PATCHLEVEL_STRING);
594 
595   // Add predefinitions based on extensions enabled
596   if (frontendOptions.features.IsEnabled(
597           Fortran::common::LanguageFeature::OpenACC)) {
598     fortranOptions.predefinitions.emplace_back("_OPENACC", "202011");
599   }
600   if (frontendOptions.features.IsEnabled(
601           Fortran::common::LanguageFeature::OpenMP)) {
602     fortranOptions.predefinitions.emplace_back("_OPENMP", "201511");
603   }
604 }
605 
606 void CompilerInvocation::setFortranOpts() {
607   auto &fortranOptions = fortranOpts();
608   const auto &frontendOptions = frontendOpts();
609   const auto &preprocessorOptions = preprocessorOpts();
610   auto &moduleDirJ = moduleDir();
611 
612   if (frontendOptions.fortranForm != FortranForm::Unknown) {
613     fortranOptions.isFixedForm =
614         frontendOptions.fortranForm == FortranForm::FixedForm;
615   }
616   fortranOptions.fixedFormColumns = frontendOptions.fixedFormColumns;
617 
618   fortranOptions.features = frontendOptions.features;
619   fortranOptions.encoding = frontendOptions.encoding;
620 
621   // Adding search directories specified by -I
622   fortranOptions.searchDirectories.insert(
623       fortranOptions.searchDirectories.end(),
624       preprocessorOptions.searchDirectoriesFromDashI.begin(),
625       preprocessorOptions.searchDirectoriesFromDashI.end());
626 
627   // Add the ordered list of -intrinsic-modules-path
628   fortranOptions.searchDirectories.insert(
629       fortranOptions.searchDirectories.end(),
630       preprocessorOptions.searchDirectoriesFromIntrModPath.begin(),
631       preprocessorOptions.searchDirectoriesFromIntrModPath.end());
632 
633   //  Add the default intrinsic module directory at the end
634   fortranOptions.searchDirectories.emplace_back(getIntrinsicDir());
635 
636   // Add the directory supplied through -J/-module-dir to the list of search
637   // directories
638   if (moduleDirJ.compare(".") != 0)
639     fortranOptions.searchDirectories.emplace_back(moduleDirJ);
640 
641   if (frontendOptions.instrumentedParse)
642     fortranOptions.instrumentedParse = true;
643 
644   if (frontendOptions.needProvenanceRangeToCharBlockMappings)
645     fortranOptions.needProvenanceRangeToCharBlockMappings = true;
646 
647   if (enableConformanceChecks()) {
648     fortranOptions.features.WarnOnAllNonstandard();
649   }
650 }
651 
652 void CompilerInvocation::setSemanticsOpts(
653     Fortran::parser::AllCookedSources &allCookedSources) {
654   const auto &fortranOptions = fortranOpts();
655 
656   semanticsContext_ = std::make_unique<semantics::SemanticsContext>(
657       defaultKinds(), fortranOptions.features, allCookedSources);
658 
659   semanticsContext_->set_moduleDirectory(moduleDir())
660       .set_searchDirectories(fortranOptions.searchDirectories)
661       .set_warnOnNonstandardUsage(enableConformanceChecks())
662       .set_warningsAreErrors(warnAsErr())
663       .set_moduleFileSuffix(moduleFileSuffix());
664 }
665