bool clang::ProcessWarningOptions(Diagnostic &Diags,
std::vector<std::string> &Warnings,
bool Pedantic, bool PedanticErrors,
bool NoWarnings) {
Diags.setSuppressSystemWarnings(true); // Default to -Wno-system-headers
Diags.setIgnoreAllWarnings(NoWarnings);
// If -pedantic or -pedantic-errors was specified, then we want to map all
// extension diagnostics onto WARNING or ERROR unless the user has futz'd
// around with them explicitly.
if (PedanticErrors)
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Error);
else if (Pedantic)
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Warn);
else
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Ignore);
// FIXME: -Wfatal-errors / -Wfatal-errors=foo
for (unsigned i = 0, e = Warnings.size(); i != e; ++i) {
const std::string &Opt = Warnings[i];
const char *OptStart = &Opt[0];
const char *OptEnd = OptStart+Opt.size();
assert(*OptEnd == 0 && "Expect null termination for lower-bound search");
// Check to see if this warning starts with "no-", if so, this is a negative
// form of the option.
bool isPositive = true;
if (OptEnd-OptStart > 3 && memcmp(OptStart, "no-", 3) == 0) {
isPositive = false;
OptStart += 3;
}
// Figure out how this option affects the warning. If -Wfoo, map the
// diagnostic to a warning, if -Wno-foo, map it to ignore.
diag::Mapping Mapping = isPositive ? diag::MAP_WARNING : diag::MAP_IGNORE;
// -Wsystem-headers is a special case, not driven by the option table. It
// cannot be controlled with -Werror.
if (OptEnd-OptStart == 14 && memcmp(OptStart, "system-headers", 14) == 0) {
Diags.setSuppressSystemWarnings(!isPositive);
continue;
}
// -Werror/-Wno-error is a special case, not controlled by the option table.
// It also has the "specifier" form of -Werror=foo and -Werror-foo.
if (OptEnd-OptStart >= 5 && memcmp(OptStart, "error", 5) == 0) {
const char *Specifier = 0;
if (OptEnd-OptStart != 5) { // Specifier must be present.
if ((OptStart[5] != '=' && OptStart[5] != '-') ||
OptEnd-OptStart == 6) {
fprintf(stderr, "warning: unknown -Werror warning specifier: -W%s\n",
Opt.c_str());
continue;
}
Specifier = OptStart+6;
}
if (Specifier == 0) {
Diags.setWarningsAsErrors(true);
continue;
}
// -Werror=foo maps foo to Error, -Wno-error=foo maps it to Warning.
Mapping = isPositive ? diag::MAP_ERROR : diag::MAP_WARNING_NO_WERROR;
OptStart = Specifier;
}
if (Diags.setDiagnosticGroupMapping(OptStart, Mapping))
fprintf(stderr, "warning: unknown warning option: -W%s\n", Opt.c_str());
}
return false;
}
void clang::ProcessWarningOptions(Diagnostic &Diags,
const DiagnosticOptions &Opts) {
Diags.setSuppressSystemWarnings(true); // Default to -Wno-system-headers
Diags.setIgnoreAllWarnings(Opts.IgnoreWarnings);
Diags.setShowOverloads(
static_cast<Diagnostic::OverloadsShown>(Opts.ShowOverloads));
// Handle -ferror-limit
if (Opts.ErrorLimit)
Diags.setErrorLimit(Opts.ErrorLimit);
if (Opts.TemplateBacktraceLimit)
Diags.setTemplateBacktraceLimit(Opts.TemplateBacktraceLimit);
// If -pedantic or -pedantic-errors was specified, then we want to map all
// extension diagnostics onto WARNING or ERROR unless the user has futz'd
// around with them explicitly.
if (Opts.PedanticErrors)
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Error);
else if (Opts.Pedantic)
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Warn);
else
Diags.setExtensionHandlingBehavior(Diagnostic::Ext_Ignore);
for (unsigned i = 0, e = Opts.Warnings.size(); i != e; ++i) {
llvm::StringRef Opt = Opts.Warnings[i];
// Check to see if this warning starts with "no-", if so, this is a negative
// form of the option.
bool isPositive = true;
if (Opt.startswith("no-")) {
isPositive = false;
Opt = Opt.substr(3);
}
// Figure out how this option affects the warning. If -Wfoo, map the
// diagnostic to a warning, if -Wno-foo, map it to ignore.
diag::Mapping Mapping = isPositive ? diag::MAP_WARNING : diag::MAP_IGNORE;
// -Wsystem-headers is a special case, not driven by the option table. It
// cannot be controlled with -Werror.
if (Opt == "system-headers") {
Diags.setSuppressSystemWarnings(!isPositive);
continue;
}
// -Werror/-Wno-error is a special case, not controlled by the option table.
// It also has the "specifier" form of -Werror=foo and -Werror-foo.
if (Opt.startswith("error")) {
llvm::StringRef Specifier;
if (Opt.size() > 5) { // Specifier must be present.
if ((Opt[5] != '=' && Opt[5] != '-') || Opt.size() == 6) {
Diags.Report(diag::warn_unknown_warning_specifier)
<< "-Werror" << ("-W" + Opt.str());
continue;
}
Specifier = Opt.substr(6);
}
if (Specifier.empty()) {
Diags.setWarningsAsErrors(isPositive);
continue;
}
// -Werror=foo maps foo to Error, -Wno-error=foo maps it to Warning.
Mapping = isPositive ? diag::MAP_ERROR : diag::MAP_WARNING_NO_WERROR;
Opt = Specifier;
}
// -Wfatal-errors is yet another special case.
if (Opt.startswith("fatal-errors")) {
llvm::StringRef Specifier;
if (Opt.size() != 12) {
if ((Opt[12] != '=' && Opt[12] != '-') || Opt.size() == 13) {
Diags.Report(diag::warn_unknown_warning_specifier)
<< "-Wfatal-errors" << ("-W" + Opt.str());
continue;
}
Specifier = Opt.substr(13);
}
if (Specifier.empty()) {
Diags.setErrorsAsFatal(isPositive);
continue;
}
// -Wfatal-errors=foo maps foo to Fatal, -Wno-fatal-errors=foo
// maps it to Error.
Mapping = isPositive ? diag::MAP_FATAL : diag::MAP_ERROR_NO_WFATAL;
Opt = Specifier;
}
if (Diags.setDiagnosticGroupMapping(Opt, Mapping))
Diags.Report(isPositive ? diag::warn_unknown_warning_option :
diag::warn_unknown_negative_warning_option)
<< ("-W" + Opt.str());
}
}
