///\brief Adds standard library -I used by whatever compiler is found in PATH.
static void AddHostCXXIncludes(std::vector<const char*>& args) {
static bool IncludesSet = false;
static std::vector<std::string> HostCXXI;
if (!IncludesSet) {
IncludesSet = true;
static const char *CppInclQuery =
"echo | " LLVM_CXX " -xc++ -E -v - 2>&1 >/dev/null "
"| awk '/^#include </,/^End of search"
"/{if (!/^#include </ && !/^End of search/){ print }}' "
"| grep -E \"(c|g)\\+\\+\"";
if (FILE *pf = ::popen(CppInclQuery, "r")) {
HostCXXI.push_back("-nostdinc++");
char buf[2048];
while (fgets(buf, sizeof(buf), pf) && buf[0]) {
size_t lenbuf = strlen(buf);
buf[lenbuf - 1] = 0; // remove trailing \n
// Skip leading whitespace:
const char* start = buf;
while (start < buf + lenbuf && *start == ' ')
++start;
if (*start) {
HostCXXI.push_back("-I");
HostCXXI.push_back(start);
}
}
::pclose(pf);
}
CheckABICompatibility();
}
for (std::vector<std::string>::const_iterator
I = HostCXXI.begin(), E = HostCXXI.end(); I != E; ++I)
args.push_back(I->c_str());
}
bool
IncrementalParser::Initialize(llvm::SmallVectorImpl<ParseResultTransaction>&
result, bool isChildInterpreter) {
m_TransactionPool.reset(new TransactionPool);
if (hasCodeGenerator())
getCodeGenerator()->Initialize(getCI()->getASTContext());
CompilationOptions CO = m_Interpreter->makeDefaultCompilationOpts();
Transaction* CurT = beginTransaction(CO);
Preprocessor& PP = m_CI->getPreprocessor();
DiagnosticsEngine& Diags = m_CI->getSema().getDiagnostics();
// Pull in PCH.
const std::string& PCHFileName
= m_CI->getInvocation().getPreprocessorOpts().ImplicitPCHInclude;
if (!PCHFileName.empty()) {
Transaction* PchT = beginTransaction(CO);
DiagnosticErrorTrap Trap(Diags);
m_CI->createPCHExternalASTSource(PCHFileName,
true /*DisablePCHValidation*/,
true /*AllowPCHWithCompilerErrors*/,
0 /*DeserializationListener*/,
true /*OwnsDeserializationListener*/);
result.push_back(endTransaction(PchT));
if (Trap.hasErrorOccurred()) {
result.push_back(endTransaction(CurT));
return false;
}
}
addClingPragmas(*m_Interpreter);
// Must happen after attaching the PCH, else PCH elements will end up
// being lexed.
PP.EnterMainSourceFile();
Sema* TheSema = &m_CI->getSema();
m_Parser.reset(new Parser(PP, *TheSema, false /*skipFuncBodies*/));
// Initialize the parser after PP has entered the main source file.
m_Parser->Initialize();
ExternalASTSource *External = TheSema->getASTContext().getExternalSource();
if (External)
External->StartTranslationUnit(m_Consumer);
// Start parsing the "main file" to warm up lexing (enter caching lex mode
// for ParseInternal()'s call EnterSourceFile() to make sense.
while (!m_Parser->ParseTopLevelDecl()) {}
// If I belong to the parent Interpreter, am using C++, and -noruntime
// wasn't given on command line, then #include <new> and check ABI
if (!isChildInterpreter && m_CI->getLangOpts().CPlusPlus &&
!m_Interpreter->getOptions().NoRuntime) {
// <new> is needed by the ValuePrinter so it's a good thing to include it.
// We need to include it to determine the version number of the standard
// library implementation.
ParseInternal("#include <new>");
// That's really C++ ABI compatibility. C has other problems ;-)
CheckABICompatibility(*m_Interpreter);
}
// DO NOT commit the transactions here: static initialization in these
// transactions requires gCling through local_cxa_atexit(), but that has not
// been defined yet!
ParseResultTransaction PRT = endTransaction(CurT);
result.push_back(PRT);
return true;
}