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llvm / llvm-project / clang / a43cea3728d9f90237f4965c7b67f554f58d7a5f / . / Driver / clang.cpp
blob: 8dfbe59f50db5cb99836b06670bac886999fecd1 [file] [log] [blame]
//===--- clang.cpp - C-Language Front-end ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
// clang --help - Output information about command line switches
// clang [options] - Read from stdin.
// clang [options] file - Read from "file".
//
//===----------------------------------------------------------------------===//
//
// TODO: Options to support:
//
// -ffatal-errors
// -ftabstop=width
// -fdollars-in-identifiers
//
//===----------------------------------------------------------------------===//
#include "clang.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceBuffer.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/System/MappedFile.h"
#include "llvm/System/Signals.h"
#include <iostream>
using namespace llvm;
using namespace clang;
//===----------------------------------------------------------------------===//
// Global options.
//===----------------------------------------------------------------------===//
static cl::opt<bool>
Verbose("v", cl::desc("Enable verbose output"));
static cl::opt<bool>
Stats("stats", cl::desc("Print performance metrics and statistics"));
enum ProgActions {
RunPreprocessorOnly, // Just lex, no output.
PrintPreprocessedInput, // -E mode.
DumpTokens // Token dump mode.
};
static cl::opt<ProgActions>
ProgAction(cl::desc("Choose output type:"), cl::ZeroOrMore,cl::init(DumpTokens),
cl::values(
clEnumValN(RunPreprocessorOnly, "Eonly",
"Just run preprocessor, no output (for timings)"),
clEnumValN(PrintPreprocessedInput, "E",
"Run preprocessor, emit preprocessed file"),
clEnumValN(DumpTokens, "dumptokens",
"Run preprocessor, dump internal rep of tokens"),
clEnumValEnd));
//===----------------------------------------------------------------------===//
// Our DiagnosticClient implementation
//===----------------------------------------------------------------------===//
// FIXME: Werror should take a list of things, -Werror=foo,bar
static cl::opt<bool>
WarningsAsErrors("Werror", cl::desc("Treat all warnings as errors"));
static cl::opt<bool>
WarnOnExtensions("pedantic",
cl::desc("Issue a warning on uses of GCC extensions"));
static cl::opt<bool>
ErrorOnExtensions("pedantic-errors",
cl::desc("Issue an error on uses of GCC extensions"));
static cl::opt<bool>
WarnUnusedMacros("Wunused_macros",
cl::desc("Warn for unused macros in the main translation unit"));
/// InitializeDiagnostics - Initialize the diagnostic object, based on the
/// current command line option settings.
static void InitializeDiagnostics(Diagnostic &Diags) {
Diags.setWarningsAsErrors(WarningsAsErrors);
Diags.setWarnOnExtensions(WarnOnExtensions);
Diags.setErrorOnExtensions(ErrorOnExtensions);
// Silence the "macro is not used" warning unless requested.
if (!WarnUnusedMacros)
Diags.setDiagnosticMapping(diag::pp_macro_not_used, diag::MAP_IGNORE);
}
static cl::opt<bool>
NoShowColumn("fno-show-column",
cl::desc("Do not include column number on diagnostics"));
static cl::opt<bool>
NoCaretDiagnostics("fno-caret-diagnostics",
cl::desc("Do not include source line and caret with"
" diagnostics"));
/// DiagnosticPrinterSTDERR - This is a concrete diagnostic client, which prints
/// the diagnostics to standard error.
class DiagnosticPrinterSTDERR : public DiagnosticClient {
SourceManager &SourceMgr;
SourceLocation LastWarningLoc;
public:
DiagnosticPrinterSTDERR(SourceManager &sourceMgr)
: SourceMgr(sourceMgr) {}
void PrintIncludeStack(SourceLocation Pos);
virtual void HandleDiagnostic(Diagnostic::Level DiagLevel,
SourceLocation Pos,
diag::kind ID, const std::string &Msg);
};
void DiagnosticPrinterSTDERR::
PrintIncludeStack(SourceLocation Pos) {
unsigned FileID = Pos.getFileID();
if (FileID == 0) return;
// Print out the other include frames first.
PrintIncludeStack(SourceMgr.getIncludeLoc(FileID));
unsigned LineNo = SourceMgr.getLineNumber(Pos);
const SourceBuffer *Buffer = SourceMgr.getBuffer(FileID);
std::cerr << "In file included from " << Buffer->getBufferIdentifier()
<< ":" << LineNo << ":\n";
}
void DiagnosticPrinterSTDERR::HandleDiagnostic(Diagnostic::Level Level,
SourceLocation Pos,
diag::kind ID,
const std::string &Extra) {
unsigned LineNo = 0, FilePos = 0, FileID = 0, ColNo = 0;
unsigned LineStart = 0, LineEnd = 0;
const SourceBuffer *Buffer = 0;
if (Pos.isValid()) {
LineNo = SourceMgr.getLineNumber(Pos);
FileID = SourceMgr.getLogicalLoc(Pos).getFileID();
// First, if this diagnostic is not in the main file, print out the
// "included from" lines.
if (LastWarningLoc != SourceMgr.getIncludeLoc(FileID)) {
LastWarningLoc = SourceMgr.getIncludeLoc(FileID);
PrintIncludeStack(LastWarningLoc);
}
// Compute the column number. Rewind from the current position to the start
// of the line.
ColNo = SourceMgr.getColumnNumber(Pos);
FilePos = SourceMgr.getSourceFilePos(Pos);
LineStart = FilePos-ColNo+1; // Column # is 1-based
// Compute the line end. Scan forward from the error position to the end of
// the line.
Buffer = SourceMgr.getBuffer(FileID);
const char *Buf = Buffer->getBufferStart();
const char *BufEnd = Buffer->getBufferEnd();
LineEnd = FilePos;
while (Buf+LineEnd != BufEnd &&
Buf[LineEnd] != '\n' && Buf[LineEnd] != '\r')
++LineEnd;
std::cerr << Buffer->getBufferIdentifier()
<< ":" << LineNo << ":";
if (ColNo && !NoShowColumn)
std::cerr << ColNo << ":";
std::cerr << " ";
}
switch (Level) {
default: assert(0 && "Unknown diagnostic type!");
case Diagnostic::Note: std::cerr << "note: "; break;
case Diagnostic::Warning: std::cerr << "warning: "; break;
case Diagnostic::Error: std::cerr << "error: "; break;
case Diagnostic::Fatal: std::cerr << "fatal error: "; break;
case Diagnostic::Sorry: std::cerr << "sorry, unimplemented: "; break;
}
std::string Msg = Diagnostic::getDescription(ID);
// Replace all instances of %s in Msg with 'Extra'.
if (Msg.size() > 1) {
for (unsigned i = 0; i < Msg.size()-1; ++i) {
if (Msg[i] == '%' && Msg[i+1] == 's') {
Msg = std::string(Msg.begin(), Msg.begin()+i) +
Extra +
std::string(Msg.begin()+i+2, Msg.end());
}
}
}
std::cerr << Msg << "\n";
if (!NoCaretDiagnostics && Pos.isValid()) {
// Print out a line of the source file.
const char *Buf = Buffer->getBufferStart();
std::cerr << std::string(Buf+LineStart, Buf+LineEnd) << "\n";
// If the source line contained any tab characters between the start of the
// line and the diagnostic, replace the space we inserted with a tab, so
// that the carat will be indented exactly like the source line.
std::string Indent(ColNo-1, ' ');
for (unsigned i = LineStart; i != FilePos; ++i)
if (Buf[i] == '\t')
Indent[i-LineStart] = '\t';
// Print out the caret itself.
std::cerr << Indent << "^\n";
}
}
//===----------------------------------------------------------------------===//
// Preprocessor Initialization
//===----------------------------------------------------------------------===//
// FIXME: Preprocessor builtins to support.
// -A... - Play with #assertions
// -undef - Undefine all predefined macros
static cl::list<std::string>
D_macros("D", cl::value_desc("macro"), cl::Prefix,
cl::desc("Predefine the specified macro"));
static cl::list<std::string>
U_macros("U", cl::value_desc("macro"), cl::Prefix,
cl::desc("Undefine the specified macro"));
// Append a #define line to Buf for Macro. Macro should be of the form XXX,
// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
// "#define XXX Y z W". To get a #define with no value, use "XXX=".
static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro,
const char *Command = "#define ") {
Buf.insert(Buf.end(), Command, Command+strlen(Command));
if (const char *Equal = strchr(Macro, '=')) {
// Turn the = into ' '.
Buf.insert(Buf.end(), Macro, Equal);
Buf.push_back(' ');
Buf.insert(Buf.end(), Equal+1, Equal+strlen(Equal));
} else {
// Push "macroname 1".
Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
Buf.push_back(' ');
Buf.push_back('1');
}
Buf.push_back('\n');
}
static void InitializePredefinedMacros(Preprocessor &PP,
std::vector<char> &Buf) {
// FIXME: Implement magic like cpp_init_builtins for things like __STDC__
// and __DATE__ etc.
#if 0
/* __STDC__ has the value 1 under normal circumstances.
However, if (a) we are in a system header, (b) the option
stdc_0_in_system_headers is true (set by target config), and
(c) we are not in strictly conforming mode, then it has the
value 0. (b) and (c) are already checked in cpp_init_builtins. */
//case BT_STDC:
if (cpp_in_system_header (pfile))
number = 0;
else
number = 1;
break;
#endif
// FIXME: These should all be defined in the preprocessor according to the
// current language configuration.
DefineBuiltinMacro(Buf, "__STDC__=1");
//DefineBuiltinMacro(Buf, "__cplusplus=1");
//DefineBuiltinMacro(Buf, "__ASSEMBLER__=1");
//DefineBuiltinMacro(Buf, "__STDC_VERSION__=199409L");
DefineBuiltinMacro(Buf, "__STDC_VERSION__=199901L");
DefineBuiltinMacro(Buf, "__STDC_HOSTED__=1");
//DefineBuiltinMacro(Buf, "__OBJC__=1");
// FIXME: This is obviously silly. It should be more like gcc/c-cppbuiltin.c.
// Macros predefined by GCC 4.0.1.
DefineBuiltinMacro(Buf, "_ARCH_PPC=1");
DefineBuiltinMacro(Buf, "_BIG_ENDIAN=1");
DefineBuiltinMacro(Buf, "__APPLE_CC__=5250");
DefineBuiltinMacro(Buf, "__APPLE__=1");
DefineBuiltinMacro(Buf, "__BIG_ENDIAN__=1");
DefineBuiltinMacro(Buf, "__CHAR_BIT__=8");
DefineBuiltinMacro(Buf, "__CONSTANT_CFSTRINGS__=1");
DefineBuiltinMacro(Buf, "__DBL_DENORM_MIN__=4.9406564584124654e-324");
DefineBuiltinMacro(Buf, "__DBL_DIG__=15");
DefineBuiltinMacro(Buf, "__DBL_EPSILON__=2.2204460492503131e-16");
DefineBuiltinMacro(Buf, "__DBL_HAS_INFINITY__=1");
DefineBuiltinMacro(Buf, "__DBL_HAS_QUIET_NAN__=1");
DefineBuiltinMacro(Buf, "__DBL_MANT_DIG__=53");
DefineBuiltinMacro(Buf, "__DBL_MAX_10_EXP__=308");
DefineBuiltinMacro(Buf, "__DBL_MAX_EXP__=1024");
DefineBuiltinMacro(Buf, "__DBL_MAX__=1.7976931348623157e+308");
DefineBuiltinMacro(Buf, "__DBL_MIN_10_EXP__=(-307)");
DefineBuiltinMacro(Buf, "__DBL_MIN_EXP__=(-1021)");
DefineBuiltinMacro(Buf, "__DBL_MIN__=2.2250738585072014e-308");
DefineBuiltinMacro(Buf, "__DECIMAL_DIG__=33");
DefineBuiltinMacro(Buf, "__DYNAMIC__=1");
DefineBuiltinMacro(Buf, "__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__=1030");
DefineBuiltinMacro(Buf, "__FINITE_MATH_ONLY__=0");
DefineBuiltinMacro(Buf, "__FLT_DENORM_MIN__=1.40129846e-45F");
DefineBuiltinMacro(Buf, "__FLT_DIG__=6");
DefineBuiltinMacro(Buf, "__FLT_EPSILON__=1.19209290e-7F");
DefineBuiltinMacro(Buf, "__FLT_EVAL_METHOD__=0");
DefineBuiltinMacro(Buf, "__FLT_HAS_INFINITY__=1");
DefineBuiltinMacro(Buf, "__FLT_HAS_QUIET_NAN__=1");
DefineBuiltinMacro(Buf, "__FLT_MANT_DIG__=24");
DefineBuiltinMacro(Buf, "__FLT_MAX_10_EXP__=38");
DefineBuiltinMacro(Buf, "__FLT_MAX_EXP__=128");
DefineBuiltinMacro(Buf, "__FLT_MAX__=3.40282347e+38F");
DefineBuiltinMacro(Buf, "__FLT_MIN_10_EXP__=(-37)");
DefineBuiltinMacro(Buf, "__FLT_MIN_EXP__=(-125)");
DefineBuiltinMacro(Buf, "__FLT_MIN__=1.17549435e-38F");
DefineBuiltinMacro(Buf, "__FLT_RADIX__=2");
DefineBuiltinMacro(Buf, "__GNUC_MINOR__=0");
DefineBuiltinMacro(Buf, "__GNUC_PATCHLEVEL__=1");
DefineBuiltinMacro(Buf, "__GNUC__=4");
DefineBuiltinMacro(Buf, "__GXX_ABI_VERSION=1002");
DefineBuiltinMacro(Buf, "__INTMAX_MAX__=9223372036854775807LL");
DefineBuiltinMacro(Buf, "__INTMAX_TYPE__=long long int");
DefineBuiltinMacro(Buf, "__INT_MAX__=2147483647");
DefineBuiltinMacro(Buf, "__LDBL_DENORM_MIN__=4.940656458412465441765687"
"92868221e-324L");
DefineBuiltinMacro(Buf, "__LDBL_DIG__=31");
DefineBuiltinMacro(Buf, "__LDBL_EPSILON__=4.9406564584124654417656879286822"
"1e-324L");
DefineBuiltinMacro(Buf, "__LDBL_HAS_INFINITY__=1");
DefineBuiltinMacro(Buf, "__LDBL_HAS_QUIET_NAN__=1");
DefineBuiltinMacro(Buf, "__LDBL_MANT_DIG__=106");
DefineBuiltinMacro(Buf, "__LDBL_MAX_10_EXP__=308");
DefineBuiltinMacro(Buf, "__LDBL_MAX_EXP__=1024");
DefineBuiltinMacro(Buf, "__LDBL_MAX__=1.7976931348623158079372897140"
"5301e+308L");
DefineBuiltinMacro(Buf, "__LDBL_MIN_10_EXP__=(-291)");
DefineBuiltinMacro(Buf, "__LDBL_MIN_EXP__=(-968)");
DefineBuiltinMacro(Buf, "__LDBL_MIN__=2.004168360008972777996108051350"
"16e-292L");
DefineBuiltinMacro(Buf, "__LONG_DOUBLE_128__=1");
DefineBuiltinMacro(Buf, "__LONG_LONG_MAX__=9223372036854775807LL");
DefineBuiltinMacro(Buf, "__LONG_MAX__=2147483647L");
DefineBuiltinMacro(Buf, "__MACH__=1");
DefineBuiltinMacro(Buf, "__NATURAL_ALIGNMENT__=1");
DefineBuiltinMacro(Buf, "__NO_INLINE__=1");
DefineBuiltinMacro(Buf, "__PIC__=1");
DefineBuiltinMacro(Buf, "__POWERPC__=1");
DefineBuiltinMacro(Buf, "__PTRDIFF_TYPE__=int");
DefineBuiltinMacro(Buf, "__REGISTER_PREFIX__");
DefineBuiltinMacro(Buf, "__SCHAR_MAX__=127");
DefineBuiltinMacro(Buf, "__SHRT_MAX__=32767");
DefineBuiltinMacro(Buf, "__SIZE_TYPE__=long unsigned int");
DefineBuiltinMacro(Buf, "__UINTMAX_TYPE__=long long unsigned int");
DefineBuiltinMacro(Buf, "__USER_LABEL_PREFIX__=_");
DefineBuiltinMacro(Buf, "__VERSION__=\"4.0.1 (Apple Computer, Inc. "
"build 5250)\"");
DefineBuiltinMacro(Buf, "__WCHAR_MAX__=2147483647");
DefineBuiltinMacro(Buf, "__WCHAR_TYPE__=int");
DefineBuiltinMacro(Buf, "__WINT_TYPE__=int");
DefineBuiltinMacro(Buf, "__ppc__=1");
DefineBuiltinMacro(Buf, "__strong");
DefineBuiltinMacro(Buf, "__weak");
if (PP.getLangOptions().CPlusPlus) {
DefineBuiltinMacro(Buf, "__DEPRECATED=1");
DefineBuiltinMacro(Buf, "__EXCEPTIONS=1");
DefineBuiltinMacro(Buf, "__GNUG__=4");
DefineBuiltinMacro(Buf, "__GXX_WEAK__=1");
DefineBuiltinMacro(Buf, "__cplusplus=1");
DefineBuiltinMacro(Buf, "__private_extern__=extern");
}
// FIXME: Should emit a #line directive here.
// Add macros from the command line.
// FIXME: Should traverse the #define/#undef lists in parallel.
for (unsigned i = 0, e = D_macros.size(); i != e; ++i)
DefineBuiltinMacro(Buf, D_macros[i].c_str());
for (unsigned i = 0, e = U_macros.size(); i != e; ++i)
DefineBuiltinMacro(Buf, U_macros[i].c_str(), "#undef ");
}
//===----------------------------------------------------------------------===//
// Preprocessor include path information.
//===----------------------------------------------------------------------===//
// This tool exports a large number of command line options to control how the
// preprocessor searches for header files. At root, however, the Preprocessor
// object takes a very simple interface: a list of directories to search for
//
// FIXME: -nostdinc,-nostdinc++
// FIXME: -isysroot,-imultilib
//
// FIXME: -include,-imacros
static cl::opt<bool>
nostdinc("nostdinc", cl::desc("Disable standard #include directories"));
// Various command line options. These four add directories to each chain.
static cl::list<std::string>
I_dirs("I", cl::value_desc("directory"), cl::Prefix,
cl::desc("Add directory to include search path"));
static cl::list<std::string>
idirafter_dirs("idirafter", cl::value_desc("directory"), cl::Prefix,
cl::desc("Add directory to AFTER include search path"));
static cl::list<std::string>
iquote_dirs("iquote", cl::value_desc("directory"), cl::Prefix,
cl::desc("Add directory to QUOTE include search path"));
static cl::list<std::string>
isystem_dirs("isystem", cl::value_desc("directory"), cl::Prefix,
cl::desc("Add directory to SYSTEM include search path"));
// These handle -iprefix/-iwithprefix/-iwithprefixbefore.
static cl::list<std::string>
iprefix_vals("iprefix", cl::value_desc("prefix"), cl::Prefix,
cl::desc("Set the -iwithprefix/-iwithprefixbefore prefix"));
static cl::list<std::string>
iwithprefix_vals("iwithprefix", cl::value_desc("dir"), cl::Prefix,
cl::desc("Set directory to SYSTEM include search path with prefix"));
static cl::list<std::string>
iwithprefixbefore_vals("iwithprefixbefore", cl::value_desc("dir"), cl::Prefix,
cl::desc("Set directory to include search path with prefix"));
// Finally, implement the code that groks the options above.
enum IncludeDirGroup {
Quoted = 0,
Angled,
System,
After
};
static std::vector<DirectoryLookup> IncludeGroup[4];
/// AddPath - Add the specified path to the specified group list.
///
static void AddPath(const std::string &Path, IncludeDirGroup Group,
bool isCXXAware, bool isUserSupplied,
FileManager &FM) {
const DirectoryEntry *DE = FM.getDirectory(Path);
if (DE == 0) {
if (Verbose)
std::cerr << "ignoring nonexistent directory \"" << Path << "\"\n";
return;
}
DirectoryLookup::DirType Type;
if (Group == Quoted || Group == Angled)
Type = DirectoryLookup::NormalHeaderDir;
else if (isCXXAware)
Type = DirectoryLookup::SystemHeaderDir;
else
Type = DirectoryLookup::ExternCSystemHeaderDir;
IncludeGroup[Group].push_back(DirectoryLookup(DE, Type, isUserSupplied));
}
/// RemoveDuplicates - If there are duplicate directory entries in the specified
/// search list, remove the later (dead) ones.
static void RemoveDuplicates(std::vector<DirectoryLookup> &SearchList) {
std::set<const DirectoryEntry *> SeenDirs;
for (unsigned i = 0; i != SearchList.size(); ++i) {
// If this isn't the first time we've seen this dir, remove it.
if (!SeenDirs.insert(SearchList[i].getDir()).second) {
if (Verbose)
std::cerr << "ignoring duplicate directory \""
<< SearchList[i].getDir()->getName() << "\"\n";
SearchList.erase(SearchList.begin()+i);
--i;
}
}
}
// Process the -I options and set them in the preprocessor.
static void InitializeIncludePaths(Preprocessor &PP) {
FileManager &FM = PP.getFileManager();
// Handle -I... options.
for (unsigned i = 0, e = I_dirs.size(); i != e; ++i) {
if (I_dirs[i] == "-") {
// -I- is a deprecated GCC feature.
PP.getDiagnostics().Report(SourceLocation(),
diag::err_pp_I_dash_not_supported);
} else {
AddPath(I_dirs[i], Angled, false, true, FM);
}
}
// Handle -idirafter... options.
for (unsigned i = 0, e = idirafter_dirs.size(); i != e; ++i)
AddPath(idirafter_dirs[i], After, false, true, FM);
// Handle -iquote... options.
for (unsigned i = 0, e = iquote_dirs.size(); i != e; ++i)
AddPath(iquote_dirs[i], Quoted, false, true, FM);
// Handle -isystem... options.
for (unsigned i = 0, e = isystem_dirs.size(); i != e; ++i)
AddPath(isystem_dirs[i], System, false, true, FM);
// Walk the -iprefix/-iwithprefix/-iwithprefixbefore argument lists in
// parallel, processing the values in order of occurance to get the right
// prefixes.
{
std::string Prefix = ""; // FIXME: this isn't the correct default prefix.
unsigned iprefix_idx = 0;
unsigned iwithprefix_idx = 0;
unsigned iwithprefixbefore_idx = 0;
bool iprefix_done = iprefix_vals.empty();
bool iwithprefix_done = iwithprefix_vals.empty();
bool iwithprefixbefore_done = iwithprefixbefore_vals.empty();
while (!iprefix_done || !iwithprefix_done || !iwithprefixbefore_done) {
if (!iprefix_done &&
(iwithprefix_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefix_vals.getPosition(iwithprefix_idx)) &&
(iwithprefixbefore_done ||
iprefix_vals.getPosition(iprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
Prefix = iprefix_vals[iprefix_idx];
++iprefix_idx;
iprefix_done = iprefix_idx == iprefix_vals.size();
} else if (!iwithprefix_done &&
(iwithprefixbefore_done ||
iwithprefix_vals.getPosition(iwithprefix_idx) <
iwithprefixbefore_vals.getPosition(iwithprefixbefore_idx))) {
AddPath(Prefix+iwithprefix_vals[iwithprefix_idx],
System, false, false, FM);
++iwithprefix_idx;
iwithprefix_done = iwithprefix_idx == iwithprefix_vals.size();
} else {
AddPath(Prefix+iwithprefixbefore_vals[iwithprefixbefore_idx],
Angled, false, false, FM);
++iwithprefixbefore_idx;
iwithprefixbefore_done =
iwithprefixbefore_idx == iwithprefixbefore_vals.size();
}
}
}
// FIXME: Add contents of the CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
// OBJC_INCLUDE_PATH, OBJCPLUS_INCLUDE_PATH environment variables.
// FIXME: temporary hack: hard-coded paths.
if (!nostdinc) {
AddPath("/usr/local/include", System, false, false, FM);
AddPath("/usr/lib/gcc/powerpc-apple-darwin8/4.0.1/include",
System, false, false, FM);
AddPath("/usr/lib/gcc/powerpc-apple-darwin8/"
"4.0.1/../../../../powerpc-apple-darwin8/include",
System, false, false, FM);
AddPath("/usr/include", System, false, false, FM);
AddPath("/System/Library/Frameworks", System, false, false, FM);
AddPath("/Library/Frameworks", System, false, false, FM);
}
// Now that we have collected all of the include paths, merge them all
// together and tell the preprocessor about them.
// Concatenate ANGLE+SYSTEM+AFTER chains together into SearchList.
std::vector<DirectoryLookup> SearchList;
SearchList = IncludeGroup[Angled];
SearchList.insert(SearchList.end(), IncludeGroup[System].begin(),
IncludeGroup[System].end());
SearchList.insert(SearchList.end(), IncludeGroup[After].begin(),
IncludeGroup[After].end());
RemoveDuplicates(SearchList);
RemoveDuplicates(IncludeGroup[Quoted]);
// Prepend QUOTED list on the search list.
SearchList.insert(SearchList.begin(), IncludeGroup[Quoted].begin(),
IncludeGroup[Quoted].end());
bool DontSearchCurDir = false; // TODO: set to true if -I- is set?
PP.SetSearchPaths(SearchList, IncludeGroup[Quoted].size(),
DontSearchCurDir);
// If verbose, print the list of directories that will be searched.
if (Verbose) {
std::cerr << "#include \"...\" search starts here:\n";
unsigned QuotedIdx = IncludeGroup[Quoted].size();
for (unsigned i = 0, e = SearchList.size(); i != e; ++i) {
if (i == QuotedIdx)
std::cerr << "#include <...> search starts here:\n";
std::cerr << " " << SearchList[i].getDir()->getName() << "\n";
}
}
}
// Read any files specified by -imacros or -include.
static void ReadPrologFiles(Preprocessor &PP, std::vector<char> &Buf) {
// FIXME: IMPLEMENT
}
//===----------------------------------------------------------------------===//
// Main driver
//===----------------------------------------------------------------------===//
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm cfe\n");
sys::PrintStackTraceOnErrorSignal();
/// Create a SourceManager object. This tracks and owns all the file buffers
/// allocated to the program.
SourceManager SourceMgr;
// Print diagnostics to stderr.
DiagnosticPrinterSTDERR OurDiagnosticClient(SourceMgr);
// Configure our handling of diagnostics.
Diagnostic OurDiagnostics(OurDiagnosticClient);
InitializeDiagnostics(OurDiagnostics);
// Turn all options on.
// FIXME: add -ansi and -std= options.
LangOptions Options;
Options.Trigraphs = 1;
Options.BCPLComment = 1; // Only for C99/C++.
Options.C99 = 1;
Options.DollarIdents = Options.Digraphs = 1;
Options.ObjC1 = Options.ObjC2 = 1;
// Create a file manager object to provide access to and cache the filesystem.
FileManager FileMgr;
// Set up the preprocessor with these options.
Preprocessor PP(OurDiagnostics, Options, FileMgr, SourceMgr);
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
std::vector<char> PrologMacros;
InitializePredefinedMacros(PP, PrologMacros);
// Process the -I options and set them in the preprocessor.
InitializeIncludePaths(PP);
// Read any files specified by -imacros or -include.
ReadPrologFiles(PP, PrologMacros);
// Set up keywords.
PP.AddKeywords();
// Now that we have emitted the predefined macros, #includes, etc into
// PrologMacros, preprocess it to populate the initial preprocessor state.
{
// Memory buffer must end with a null byte!
PrologMacros.push_back(0);
SourceBuffer *SB = SourceBuffer::getMemBuffer(&PrologMacros.front(),
&PrologMacros.back(),
"<predefines>");
assert(SB && "Cannot fail to create predefined source buffer");
unsigned FileID = SourceMgr.createFileIDForMemBuffer(SB);
assert(FileID && "Could not create FileID for predefines?");
// Start parsing the predefines.
PP.EnterSourceFile(FileID, 0);
// Lex the file, which will read all the macros.
LexerToken Tok;
PP.Lex(Tok);
assert(Tok.getKind() == tok::eof && "Didn't read entire file!");
// Once we've read this, we're done.
}
unsigned MainFileID = 0;
if (InputFilename != "-") {
const FileEntry *File = FileMgr.getFile(InputFilename);
if (File) MainFileID = SourceMgr.createFileID(File, SourceLocation());
if (MainFileID == 0) {
std::cerr << "Error reading '" << InputFilename << "'!\n";
return 1;
}
} else {
SourceBuffer *SB = SourceBuffer::getSTDIN();
if (SB) MainFileID = SourceMgr.createFileIDForMemBuffer(SB);
if (MainFileID == 0) {
std::cerr << "Error reading standard input! Empty?\n";
return 1;
}
}
// Start parsing the specified input file.
PP.EnterSourceFile(MainFileID, 0, true);
switch (ProgAction) {
case RunPreprocessorOnly: { // Just lex as fast as we can, no output.
LexerToken Tok;
do {
PP.Lex(Tok);
} while (Tok.getKind() != tok::eof);
break;
}
case PrintPreprocessedInput: // -E mode.
DoPrintPreprocessedInput(PP);
break;
case DumpTokens: { // Token dump mode.
LexerToken Tok;
do {
PP.Lex(Tok);
PP.DumpToken(Tok, true);
std::cerr << "\n";
} while (Tok.getKind() != tok::eof);
break;
}
}
if (Stats) {
// Printed from low-to-high level.
PP.getFileManager().PrintStats();
PP.getSourceManager().PrintStats();
PP.getIdentifierTable().PrintStats();
PP.PrintStats();
std::cerr << "\n";
}
}