[cfe-dev] Tool programming. Where can I get default platform configuration ?
Sean Silva
silvas at purdue.edu
Sat Sep 1 06:19:04 PDT 2012
There is CompilerInvocation::CreateFromArgs and
CompilerInvocation::setLangDefaults.
However, note that this is generally not a "supported" use case. You
can spend months trying to make this work, but at most you will get
something brittle that barely works (I speak directly from
experience). If put to it, I could probably make most of the things
work with the knowledge I have now, but there are some pretty
fundamental things that would need some hacking inside clang. For
example, the builtin header includes (e.g. clang's stddef.h) that are
found is a way that assumes that the program is being invoked from
within a certain filesystem layout, so that you would have to have the
tool sitting in a special directory in order to do it the "correct"
way.
The way to get around this and have all of the compiler configuration
stuff Just Work is to use a plugin
<http://clang.llvm.org/docs/ClangPlugins.html>. If you are already
building the project with Clang and all you need is CompilerInstance
and an ASTConsumer, then a plugin should suit your use case perfectly.
--Sean Silva
On Sat, Sep 1, 2012 at 5:51 AM, Y. Orçun Gökbulut
<orcun.gokbulut at zinekengine.com> wrote:
> Hello everyone,
>
>
>
> I’m trying to develop a tool based on cmake and I have couple of problems.
> I’ll be really happy if anyone would help me. J
>
>
>
> In our project we have a custom c++ reflection library and we are using it
> pretty much everywhere. Our developer uses a simple tool to generate type
> information from header files. It is a very simple tool which requires ugly
> syntax (I’m not fond of it) in source code. Therefore we have decided to
> replaced it with an source to source transformation tool based on cmake. We
> have developed the tool simply by using CompilerInstance and ASTConsumer
> which is pretty neat and simple. :D It works perfectly in our test inputs.
>
>
>
> The tool works perfectly and is going to improve our code quality massively.
> However the problem is when we have tried to use our new tool in our actual
> project code. It produces tremendous amounts of error output in system
> headers. (crtlib, ostream, string) Our main development platform is Windows
> and Visual Studio 2010. When I tried to compile the actual project code in
> clang.exe it compiled the files perfectly fine.
>
>
>
> So I have looked out for a way to make our tool behave more like clang.exe;
>
> · I have tried to set CompilerInstance options manually. I have
> compiled target code with clang.exe –v and tried to match the clangs.exe’s
> default options in the tool’s source code. I have achieved some progress but
> not fully get rid of the errors.
>
> · I have tried tooling library. But I could not get it working.
>
> · I have tried to reverse engineer frondend, driver and clang code.
> But I got stuck.
>
>
>
> So, my question is how can I automatically configure my CompilerInstance for
> my platform ? (Include paths, compiler definitions, compiler options,
> preprocessor options, language options) Is there a way, function, class or
> mechanism that automatically configures CompilerInstance ?
>
>
>
> Here is my actual code;
>
> int main_compiler_instance(int argc, const char** argv)
>
> {
>
> CompilerInstance Compiler;
>
> Compiler.createDiagnostics(0, NULL);
>
>
>
> TargetOptions to;
>
> to.Triple = llvm::sys::getDefaultTargetTriple();
>
> TargetInfo *pti =
> TargetInfo::CreateTargetInfo(Compiler.getDiagnostics(), to);
>
> Compiler.setTarget(pti);
>
>
>
> Compiler.getPreprocessorOpts().UsePredefines = false;
>
>
>
> Compiler.getLangOpts().CPlusPlus = 1;
>
> Compiler.getLangOpts().Bool = 1;
>
> Compiler.getLangOpts().MSCVersion = 1300;
>
> Compiler.getLangOpts().MicrosoftExt = 1;
>
> Compiler.getLangOpts().MicrosoftMode = 1;
>
> Compiler.getLangOpts().CPlusPlus0x = 1;
>
> Compiler.getLangOpts().ShortWChar = 1;
>
> Compiler.getLangOpts().Exceptions = 1;
>
> Compiler.getLangOpts().CXXExceptions = 1;
>
> Compiler.getLangOpts().DelayedTemplateParsing = 1;
>
> Compiler.getLangOpts().MathErrno = 1;
>
> Compiler.getHeaderSearchOpts().ResourceDir =
> "c:/llvm/bin\\..\\lib\\clang\\3.2";
>
>
> Compiler.getHeaderSearchOpts().AddPath("c:/llvm/bin/../lib/clang/3.2/include",
> frontend::System, false, false, true, true);
>
> Compiler.getHeaderSearchOpts().AddPath("C:\\Program Files
> (x86)\\Microsoft SDKs\Windows\v7.0A\Include", frontend::System, false,
> false, true, true);
>
> Compiler.getHeaderSearchOpts().AddPath("C:\\Program Files
> (x86)\\Microsoft Visual Studio 10.0\\VC\\include", frontend::System, false,
> false, true, true);
>
>
> Compiler.getHeaderSearchOpts().AddPath("C:\\Users\\Orcun\\Desktop\\ZEPrototypes\\Source",
> frontend::Quoted, false, false, true);
>
>
> Compiler.getHeaderSearchOpts().AddPath("C:\\Users\\Orcun\\Desktop\\ZEPrototypes\\Source\\ZEFoundation",
> frontend::Quoted, false, false, true);
>
>
> Compiler.getHeaderSearchOpts().AddPath("C:\\Users\\Orcun\\Desktop\\ZEPrototypes\\Source\\ZECodeGenerator",
> frontend::Quoted, false, false, true);
>
>
>
> Compiler.getPreprocessorOpts().addMacroDef("_WIN32");
>
> Compiler.getPreprocessorOpts().addMacroDef("_WINDOWS");
>
> Compiler.getPreprocessorOpts().addMacroDef("_WCHAR_T_DEFINED");
>
>
>
> Compiler.createFileManager();
>
> Compiler.createSourceManager(Compiler.getFileManager());
>
> Compiler.createPreprocessor();
>
> Compiler.setASTConsumer(new ZECodeGeneratorASTConsumer());
>
> Compiler.createASTContext();
>
>
>
> const FileEntry *pFile = Compiler.getFileManager().getFile(argv[1]);
>
> Compiler.getSourceManager().createMainFileID(pFile);
>
>
> Compiler.getDiagnosticClient().BeginSourceFile(Compiler.getLangOpts(),
> &Compiler.getPreprocessor());
>
>
>
> ParseAST(Compiler.getPreprocessor(), &Compiler.getASTConsumer(),
> Compiler.getASTContext(), false, clang::TU_Complete, NULL, true);
>
>
>
> Compiler.getDiagnosticClient().EndSourceFile();
>
>
>
> return 1;
>
> }
>
>
>
> #include "clang/Tooling/Tooling.h"
>
> #include "llvm/Support/CommandLine.h"
>
> #include "clang/Tooling/CompilationDatabase.h"
>
>
>
> using namespace clang::tooling;
>
> using namespace llvm;
>
>
>
> int main_tooling(int argc, const char **argv)
>
> {
>
> FixedCompilationDatabase* Database =
> FixedCompilationDatabase::loadFromCommandLine(argc, argv); //Actually I’m
> not pretty sure what it does.
>
> ClangTool Tool(*Database, Database->getAllFiles());
>
> return
> Tool.run(newFrontendActionFactory<ZECodeGeneratorFrontendAction>());
>
> }
>
>
>
> int main(int argc, const char** argv)
>
> {
>
> /* Select one of them */
>
> //main_compiler_instance(argc, argv);
>
> //main_tooling(argc, argv);
>
> }
>
>
>
> And here is the command line options that I use: ZEMeta.cpp -I
> ..\ZEFoundation -I ..
>
>
>
> “main_tooling” function does not work because
> “FixedCompilationDatabase::loadFromCommandLine(argc, argv);” function return
> NULL.
>
>
>
> I have appended output log of “main_compiler_instance” function at the end
> of this email. Output log is very big (256+ KB) so I have removed some of
> the errors. When compiling the ZEMeta.cpp with clang.exe It does not
> produces these errors.
>
>
>
> Thanks to anyone has read this long email and have a nice day,
>
> Orcun.
>
>
>
> Note: My native language is not English. Therefore, I’m sorry if I could not
> express myself clearly or correctly.
>
>
>
> --- Output Log ---
>
> In file included from ZEMeta.h:2:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEDS/ZEArray.h:66:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEError.h:41:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZELog.h:5:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZEDS/ZEString.h:40:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\string:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\istream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ostream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ios:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocnum:10:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\streambuf:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xiosbase:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocale:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\stdexcept:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\exception:38:
>
> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\eh.h:58:53:
> error: unknown type name 'type_info'
>
> _CRTIMP int __cdecl _is_exception_typeof(_In_ const type_info &_Type, _In_
> struct _EXCEPTION_POINTERS * _ExceptionPtr);
>
>
>
> In file included from ZEMeta.h:2:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEDS/ZEArray.h:66:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEError.h:41:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZELog.h:5:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZEDS/ZEString.h:40:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\string:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\istream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ostream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ios:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocnum:10:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\streambuf:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xiosbase:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocale:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\stdexcept:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\exception:39:
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\malloc.h:187:40: error: use of undeclared identifier
> '_ALLOCA_S_MARKER_SIZE'
>
> _STATIC_ASSERT(sizeof(unsigned int) <= _ALLOCA_S_MARKER_SIZE);
>
> ^
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\malloc.h:43:63: note: expanded from macro '_STATIC_ASSERT'
>
> #define _STATIC_ASSERT(expr) typedef char __static_assert_t[ (expr) ]
>
>
>
> In file included from ZEMeta.h:2:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEDS/ZEArray.h:66:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEError.h:41:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZELog.h:5:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZEDS/ZEString.h:40:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\string:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\istream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ostream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ios:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocnum:10:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\streambuf:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xiosbase:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocale:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\stdexcept:7:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xstring:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xmemory:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xutility:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\utility:9:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\type_traits:6:
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\limits:182:22: error: use of undeclared identifier
> '__FLT_RADIX__'
>
> _STCONS(int, radix, FLT_RADIX);
>
>
>
> In file included from ZEMeta.h:2:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEDS/ZEArray.h:66:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation\ZEError.h:41:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZELog.h:5:
>
> In file included from
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZEDS/ZEString.h:40:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\string:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\istream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ostream:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\ios:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocnum:10:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\streambuf:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xiosbase:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xlocale:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\stdexcept:7:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xstring:6:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xmemory:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\xutility:8:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\utility:9:
>
> In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\type_traits:6:
>
> C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\limits:27:61:
> note: expanded from macro '_STCONS'
>
> #define _STCONS(ty, name, val) static const ty name = (ty)(val)
>
> ^
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\limits:240:23: error: use of undeclared identifier
> '__CHAR_BIT__'
>
> _STCONS(int, digits, CHAR_BIT - (CHAR_MIN != 0 ? 1 : 0));
>
>
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\limits:1467:15: error: default initialization of an object
> of const type 'const int'
>
> _STCONS(int, digits, CHAR_BIT);
>
>
>
> C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\include\limits:1490:15: error: no member named 'digits10' in
> 'std::numeric_limits<unsigned short>'
>
> _STCONS(int, digits10, (CHAR_BIT * sizeof (unsigned short) - 1)
>
>
>
> C:\Users\Orcun\Desktop\ZEPrototypes\Source\ZEFoundation/ZEDS/ZEString.h:233:74:
> error: expected expression
>
> static ZEString FromUInt64(ZEUInt64
> Value, const char* Format = NULL);
>
>
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