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Infer -target and --driver-mode from argv[0]

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Fix #511
This commit is contained in:
Fangrui Song 2019-10-31 22:31:03 -07:00
parent 3e04997061
commit 3dd7289141
1 changed files with 14 additions and 0 deletions
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14
src/clang_tu.cc
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@ -7,6 +7,7 @@
#include "platform.hh"
#include <clang/AST/Type.h>
#include <clang/Driver/Driver.h>
#include <clang/Lex/Lexer.h>
#include <llvm/Support/Path.h>
@ -79,6 +80,19 @@ buildCompilerInvocation(const std::string &main, std::vector<const char *> args,
IntrusiveRefCntPtr<DiagnosticsEngine> diags(
CompilerInstance::createDiagnostics(new DiagnosticOptions,
new IgnoringDiagConsumer, true));
// Similar to clang/tools/driver/driver.cpp:insertTargetAndModeArgs but don't
// require llvm::InitializeAllTargetInfos().
driver::Driver d(args[0], llvm::sys::getDefaultTargetTriple(), *diags);
auto target_and_mode =
driver::ToolChain::getTargetAndModeFromProgramName(args[0]);
if (target_and_mode.DriverMode)
args.insert(args.begin() + 1, target_and_mode.DriverMode);
if (!target_and_mode.TargetPrefix.empty()) {
const char *arr[] = {"-target", target_and_mode.TargetPrefix.c_str()};
args.insert(args.begin() + 1, std::begin(arr), std::end(arr));
}
std::unique_ptr<CompilerInvocation> ci =
createInvocationFromCommandLine(args, diags, vfs);
if (ci) {